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depth, 64—74 in.; grey clay with gravel and stones; temperature at the bottom + 1,65° C:
4 mature females and 14 larvae; R. M. S. 137. S. A. E., Station 24, off Grytviken, lat.
54° 22’ S., long. 36° 27’ W.; 20. V. 1902; depth, 95 m.; clay: 2 juvenes; R. M. S. 138. S. A. E.,
Station 30, Morän Fiord, lat. 54° 24’ S., long. 36° 26’ W.; 26. V. 1902; depth, 125 m.; clay with
scattered stones; temperature at the bottom — 0,25° C: 1 mature female; R. M. S., on slides.
Tvpe-specimen, on slides, R. M. S.
Sub-genus Scleroconcha n. sub-gen.
Philomedes (p art.), a u t o r u m.
Diagnosis: — See above p. 380.
Remark: — For the number of species see above, p. 380. .
Sub-genotype is Ph. (Sei.) Appellöf i n. sp.
Ph. (Scleroconcha) Appellöfi* n. sp.
Description: — Female: —
Shell: — Length, 3,3—3,6 mm.; length : height about 1,5 : 1; length : breadth about
2:1. Seen from the side (fig. 1) it varies, though only slightly, in shape. It is somewhat
sub-rhomboidal with its greatest height at about the middle. The dorsal and ventral margins
are boldly arched. The former is somewhat irregulär, its posterior part is sometimes more
flattened than is shown in the accompanying figure and with a distinct corner marked off from
the posterior margin of the shell. The ventral margin, is uniformly curved, passing without
any corner into the posterior margin of the shell. The posterior part of the shell is drawn out
into a strongly projecting, rounded beak-like process somewhat ventrally of half the height
of the shell. The rostrum has a strongly projecting, rounded anterior corner; when the shell
is seen from the side, the ventral margin of the rostrum is covered by a strongly projecting,
powerful process, somewhat rounded distally (cf. fig. 3). The incisur is broad. almost
rectangular, and is marked off from the ventral margin of the shell by a rather large and
somewhat bifurcated protubérance. Seen from beneath (fig. 2) the shell has almost parallel
sides anteriorly and posteriorly converging irregularly and suddenly towards the anterior and
posterior points. The surface of the shell has a powerful, décorative sculpture: partly four
strongly projecting longitudinal ridges, and also mimerous irregulär foveolae of moderate depth
and size, situated close together. Of the four ridges two, one dorsal one and one ventral one, run
close to the margin of the shell, which they cover to a great extent when the shell is seen from
the side; the dorsal one splits about half-way along the shell into two ridges running close to each
* This specie s is called after my esteemed teacher, Professor A. Appcllöf.
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