38 AUSTRALASIAN ANTARCTIC EXPEDITION. 
attenuate. Dorsal border straight and long. Surface sloping rapidly from the region 
of the high alar process of the ventral, towards the antero-dorsal region. A short, 
Spinous process in the central dorsal area. The ventral process is very pronounced. 
Both processes beset with numerous prickles, whilst there are a-few scattered along 
the anterior border. General surface smooth and undulate, with two curved parallel 
sulci in front of the median area. 
Dimensions.—Length, -846 mm.; height, -48 mm.; width of carapace, -65 mm. 
Observations.—This species is nearly related to B. tuberculata’ from Funafuti, 
but is anteriorly higher and does not show the dorsal tubercle of that species. 
Occurrence.—No. 59 (12th December, 1912), 1,320 fathoms. 
BYTHOCYTHERE MAWSONI sp. nov. Plate XXII, figs. 8, 8a. 
Description.—Carapace elongate, subovate, depressed. Seen from the side, 
broad anteriorly, narrowing posteriorly and ending acuminately. Dorsal border gently 
curved, ventral border longer and straight. Anterior margin depressed, behind which 
is a rounded ridge and sulcus, from which rises the median convexity of the valve, 
steeply towards the postero-ventral area. General surface covered with a minute, 
regularly polygonal pitting with raised borders to the pits. 
Dimensions.—Length, -46 mm.; height, -23 mm.; width of carapace, -27 mm. 
Observations.—This species links certain forms of Bythocypris with Cytherura. 
‘The oblique posterior extremity shows its greater affinity with the latter genus. In 
general shape it is like B, retiolata Chapman? from Funafuti, but differs in having an 
evenly sloping ventral crest and less attenuated posterior. 
Occurrence——No. 58 (11th December, 1912), 1,180 fathoms. Off Kaiser 
Wilhelm IT Land. 
Genus PsEUDOCYTHERE G. O. Sars. 
PsEUDOCYTHERE CAUDATA G.O. Sars. 
Pseudocythere caudata Sars, 1865, Oversigt Norges marine Ostrac., p. 88. G.S. 
Brady, 1868, Mon. Rec. Ostracoda, Trans. Linn. Soc. Lond., vol. XXVI, p. 453, pl. 
XXXIV, figs. 49-52; pl. XLI, fig. 6. Brady, Crosskey and Robertson, 1875, Mon. 
Pal. Soc., vol. XXVIII, p. 210, pl. UH, fig. 9. G.S. Brady, 1880, Rep. Chall. Zool., vol. 
I, pt. III, p. 144, pl. I, fig. 6a-d. Brady and Norman, 1889, Sci. Trans. R. Dubl. Soc., 
ser. 2, vol. IV, p. 225. Egger, 1901, Abhandl. d. k. bayer. Ak. Wiss., vol. XXI, pt. II, 
p. 463, pl. VIII, figs. 38, 34. Chapman, 1910, Proc. Linn. Soc. Lond. Zool., vol. XXX, 
p- 438. Idem, 1915, Sci. Res. “ Endeavour,” vol. III, pt. I, p. 50. 
1 Chapman, Journ. Linn. Soc. Lond. Zool., vol. XXX, 1910, p. 437, pl. lvii, figs. 27a, b. 
*Tom. supra cit., p. 437, pl. lvii, figs. 26a, b. 
