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five or six were observed in a distinct lower row and one near the main bristle b. The end claw
is strong, but rather short; it is about as long as the anterior side of the second endopodite joint
to the main bristle c.
Maxilla (fig. 5): —Protopo dit e: Contrary to what is the case in ail the other
known species of this genus, the distal endite, like the proximal one, is armed witli four bristles,
three rather long, subequal ones and one quite short one. The dorso-proximal bristle is rather
short. There is one moderately long ventral bristle and two subequal dorso-distal bristles,
which are about as long as the dorso-proximal bristle; one of these is situated so me what
prox-imally of the other. (The dorso-distal bristles were found on only one of the two specimens
investigated; the other was defective in this character.) The short ventero-distal bristle is
developed.
S i X t h 1 i m b: — This is of the same type as in A. Grimaldi; I was unable to ascertain
exactly the number of ventral bristles, but it is probably about the same as in the
above-mentioned species.
The s e v e n t h 1 i m b is of the same type as that of A. Grimaldi.
The f urca has eight (nine?) claws, of which the six anterior ones may be denoted as
main claws; they are of about the same type as is reproduced for the female of A. Grimaldi.
i. e. with a moderately strong bend on the anterior claws. The two anterior claws have no
ventero-proximal spines. The two posterior ones, the secondary claws, are annulated. The equipment
of all these claws is the typical one for males of this genus.
Remarks: — The description given above is based on investigations of two specimens
from Trincomalee, Ceylon, which were kindly placed at my disposai by the Zoological
Museum o f Copenhagen and which were termed type specimens by Professor
Cf. 8. Bh A DY. Unfortunately, however, the description is, as is seen, very incomplete; this
is due to the exceedingly bad condition of the specimens — mixed with dirt, breaking easily
and with many of their bristles broken. Still 1 hope that this re-description has made the
systematic position of this species more certain.
The direct deviations from G. S. Bkady’s original description that occur are probably
due to the exceedingly superficial method of investigation employed by this writer. I may
mention here: Shell: „antennal notch rather wide and shallow“, „posterior extremity . . . .
bearing two fascieles of hairs, one near the dorsal, the other near the ventral end“. Man dible:
„there is no toothed process on the basal joint“. F u rca: the absence of „distinct pectinated
armature“ on the claws.
As is seen above, I have written A. oculata G. S. Brady (part.) as a synonym of this species.
The reason for this is that there did not seem to be sufficient reasons for grouping the female
described by G. S. Brady 1902 a, p. 180 under this name together with the male discussed above.
So far in the literature there is only one statement to the eSect that mature males of this
genus have been reared from larvae in aquariums, namelv G. \V. MÜI.i.lu’s statement, 1894.
p. 13, about A. oblonga (E. Grvre). As the male in the last larval stage is very like the mature
female, there seems to be no doubt that the male larvae with which G. W. Müller experimented
Material.
Differences from the
original description.
Synonymi/.
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