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6
Expedition i Biscayerbugteii gjort opmærksom herpaa" og
tillige paapeget, at den lier omhandlede Form slutter sig
meget nær til den af Stimpson1 under Benævnelsen Scyra
umbonata kortelig characteriserede Krabbe fra Havet om
Florida. Milne Edwards foreslaar at oprette for begge disse
Former en ny Slægt under ovenstaaende Navn.
Angaaende denne Slægts systematiske Stilling og
Forhold til de ovrige bekjendte Oxyrhyncher, synes det efter
Øjenhulernes Bygning og andre Characterer klart, at den
maa henfores til Familien Majidæ, i den Begrændsning
hvori denne Familie for Tiden ialmindeliglied opfattes,
altsaa temmelig fjernt saavel fra Slægten Amathia som fra
Scyra, hvoraf den første tilhører Familien Inachidæ, og den
sidste Familien Periceridæ. ifølge den nylig af E. Miers givne
Bevision af Oxyrhyncherne.i Blandt Majiderne igjen
tilhorer den utvivlsomt Underfamilien Majinæ og slutter sig,
som det synes, nærmest til Slægten Hyastenus White, hvis
Arter væsentlig stammer fra den nordlige Del af det stille
Ocean.
Bay of Biscay, first drew attention to this fact, and also
alluded to the form in question very closely approximating
the crab occurring oft’ the coast of Florida and briefly
characterized by Stimpson1 under the name of Scyra
umbonata. Milne Edwards suggests establishing a new genus
for both these forms, under the aforesaid designation.
As regards the systematic position and relation of
this genus to the other known Oxyrhynclia, it should
certainly. from the structure of the orbita and other characters,
be classed under the family Majidæ, within the limits at
present usually assigned to that family, — hence
comparatively remote alike from the genus Amathia and from the
genus Scyra, the first of which belongs to the family
Inachidæ and the latter to the family Periceridæ, according,
to the revision of the Oxyrhynclia- lately published by
E. Miers. Again, among the Majidæ it unquestionably
belongs to the sub-family Majinæ, and would seem to
approximate closest the genus Hyastenus, White, chiefly
represented in the northern part of the Pacific Ocean.
• I. Scyramathia Carpenteri, (Norman).
(Pl. I, Fig. 1—7).
Svu: Amatliia Carpenteri, Norman, i Wyville Thomson’s: "The Depths
of the Sea", pg. 175, Fig. 35.
Artseharaeteristie. Legemet overalt tæt og kort
laaddent. Bygskjoldet noget længere end bredt, bagtil i
Midten udbuet, oventil stærkt hvælvet samt forsynet med
VI stumpe Forhøininger. hvoraf de 3 tilhører Maveregionen,
1 Hjerteregionen. 2 hver Gjelleregion og 1 Tarmregionen.
Deu laterale Fortsats paa Gjelleregionen stor. skarpt
tilspidset, lige udadrettet, Hepaticaltornen triangulær, begge
overragende Siderne af Bygskjoldet, ovenfra seet.
Pandehornets Grene af Bygskjoldets halve Længde, lige, stærkt
divergerende, sylformigt tilspidsede. Præorbitaltornen
triangulær, Postorbitaltornen stump; Indtnittet mellem begge
i Bunden afrundet. Øineue meget smaa, med lyst Pigment.
Fangarmene uden tydelige Torner, smalt cylindriske, med
Haanden neppe fortykket. Fingrene simple ikke forcipate,
og kortere end Palmen. 1ste Par Gangfødder en halv Gang
til saa lange som Fangarmene og ligesom de følgende Par
simpelt cylindriske; Endekloen forlænget med Spidsen nøgen,
hornfarvet. Hunnens Bagkrop stor og bred, næsten
cir-kelformig, med en stump Kjøl efter Midten. Farven
ensformig skidden graabrun. Spandvidde indtil 250""".
1 Preliminary Report on the Crustacea dredged in the Gulf
Stream. Part I. Brachyura.
2 "On the classification of the Majoid Crustacea" i Linnean
Society’s Journal. Zool., Vol. XIV.
1. Scyramathia Carpenteri. (Norman).
I Pl. I, figs. 1—7.)
Syn. Amathia Carpenteri, Norman, in Wvville Thomson’s: "The Depths
of the Sea," p. 175, fig. 35.
Specific Character. — Body covered over the whole
surface with a close, velvety pubescence. Carapax somewhat
longer than broad, posteriorly arched in the middle, above
extremely arcuate and furnished with 9 obtuse
protuberances, of which 3 belong to the gastric region, 1 to the cardiac
region. 2 to each of the branchial regions, and 1 to the
intestinal region. Lateral process on the branchial region
large, very acute, and pointing straight outwards, hepatic
spine triangular, both projecting beyond the sides of the
carapax when viewed from above. Branches of the rostrum
half the length of the carapax, straight, widely diverging,
styliform, acuminate. Preorbital spine triangular, postorbital
obtuse; the incision between rounded at the bottom. Eyes
exceedingly small, with a light-coloured pigment. Chelipeds
without distinct spines, slender cylindric. hand exhibiting
scarcely any inspissation. dactyli simple, not forcipate, and
shorter than the palm. First pair of ambulatory legs half
again the length of the chelipeds, and, like the following
pairs, simple cylindric; terminal claw produced, with the
point naked, and of a horny colour. In females, the abdo-
1 Preliminary Report on the Crustacea dredged in the Gulf
Stream, Part I. Brachyura.
- "On the classification of the Majoid Crustacea," in the Linnean
Society’s Journal. Zool.. Vol. XIV.
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