OSTRACODA—CHAPMAN, 389 
Observations. —This widely distributed species is common and typical in the: 
present collections—ranging from the polar seas to the Tasmanian area. 
Occurrence.—No. 29 (14th February, 1912‘, 125 fathoms. No. 30 (15th 
February, 1912), 182 fathoms. No. 31 (15th February, 1912), 220 fathoms. No. 59 
(12th December, 1912), 1,320 fathoms. 
Genus SCLEROCHILUS G. O. Sars. 
SCLEROCHILUS ConToRTUS Norman sp. 
Cythere contorta Norman, 1862, Ann. Mag. Nat. Hist., vol. IX, p. 48, pl. IL, 
fig. 15. Trans. Tyneside Nat. F.C., vol. V, p. 150, pl. IT, fig. 15. 
Sclerochilus contortus Norman sp., Sars, 1865, Oversigt Norges marine Ostrac..,. 
p. 90. Brady, 1868, Trans. Linn. Soc. Lond., vol. XXVI, p. 455, pl. XXXIV, figs. 
5-10, pl. XLI, fig. 7. Brady, Crosskey and Robertson, 1874, Mon. Pal. Soc., vol.. 
XXVIII, p. 212, pl. X, figs. 33-35. Brady, 1880, Rep. Chall. Zool., vol. I, pt. IIL, 
p- 147, pl. XX XV, figs, 8a,b. Brady and Norman, 1889, Trans. R. Dubl. Soc., ser. 2,. 
vol. 4, p. 225. 
Observations.—This species is widely scattered, its habitat embracing the North 
Sea, Bay of Biscay, Mediterranean and the Southern Ocean. The “ Challenger”’ 
examples came from Kerguelen Island, Heard Island, and Wellington Harbour, New 
Zealand. 
Occurrence.—No. 29 (14th February, 1912), 125 fathoms. No. 31 (15th 
February, 1912), 220 fathoms. No. 60 (12th December, 1912), 1,300 fathoms. No-~ 
139 (27th January, 1914), 328 fathoms. 
SCLEROCHILUS LINEATUS sp.nov. Plate XXII, figs. 9, 9a, b. . 
Description.—Carapace, long-ovate; attenuate at extremities. Seen from side, 
dorsal border straight in median area, obliquely truncated to anterior and concavely 
rounded to posterior; ventral border concave in anterior third, gently convex in lower 
half; anterior extremity bluntly rounded, posterior subacuminately rounded; margins. 
depressed anteriorly and on the post-ventral edges. Surface steeply arched dorsally 
and gently sloping to the ventral border. Surface of valve relieved with fine and 
widely spaced lineation. 
Dimensions. —Length, :856 mm.; height, -327 mm.; width of carapace, -3 mm. 
Occurrence.—No. 30 (15th February, 1912), 182 fathoms. 
Genus Xipuicuitus Brady. 
XIPHICHILUS AaRCcUATUS G. S. Brady. 
(?) Xiphichilus arcuatus G. 8. Brady, 1880, Rep. Chall. Zool., vol. I, pt. I, 
p. 148, pl. XXXV, figs. 2a-d. 
