OSTRACODA—CHAPMAN, 37 
CYTHEROPTERON FIMBRIATUM Chapman. 
Cytheropteron fimbriatum Chapman, 1915, Sci. Res. “ Endeavour,” vol. III, 
pt. I, p. 48, pl. IU, figs. 3a, b. 
Observations —The single right valve found in the present soundings off Kaiser 
Wilhelm II Land, essentially agrees with the form described from the east of Tasmania 
at 777 fathoms. The valve is slightly higher than in the figured type and the extreme 
margin of the alar process is bordered with a series of small depressions. 
Occurrence —No. 139 (27th January, 1914), 328 fathoms. 
CYTHEROPTERON UMBONATUM Williamson sp., var. ACANTHOPTERA Marsson var. 
Plate XXII, figs. 5, 5a. 
Cythere acanthoptera Marsson, 1880, Mitth. naturw. Neu-Vorpommern und 
Riigen, p. 45, pl. II, figs. 14a-c. | 
Cytheropteron umbonatum Williamson sp., var. acanthoptera Marsson var. Jones- 
and Hinde, 1890, Pal. Soc. Mon., vol. XLIII p- 41, pl. I, figs. 11-13; pl. IV, figs. 
22-29. Chapman, 1898, Ann. Mag. Nat. Hist., ser. 7, vol. XI, p. 342. Idem, 1900,. 
Proc. Geol, Assoc., vol. XVI, p. 268. 
Cytheropteron acanthopteron Marsson sp., Egger, 1901, Abhandl. d. k. bayer. Ak. 
Wiss., vol. XXI, pt. I, p. 460, pl. IV, figs. 46-48. 
Observations —It is extremely interesting to again record this Cretaceous variety 
as a living form. Dr. Egger’s discovery of it in recent soundings was made in “‘ Gazelle ’”” 
dredgings, off Australia in 357 metres. 
The present example has a well-developed boss on the dorsal area, above the 
dorso-median sulcus. The surface of the valve is spinose, as in the fossil examples. 
Occurrence.—No. 29 (14th February, 1912), 125 fathoms. Off Kaiser Wilhelm IT 
Land. 
CYTHEROPTERON WELLINGTONIENSE G. S. Brady. Plate XXII, figs. 6, 6a. 
Cytheropteron wellingtoniense G. 8. Brady, 1880, Rep. Chall. Zool., vol. I, pt. III, 
p- 186, pl. XXXIV, figs. 4a-d. Chapman, 1910, Journ. Linn. Soc. Lond. Zool., vol. 
XXX, p. 436. 
Observations —As in the specimens from Funafuti (1,050 fathoms), the present 
example has a more evenly rounded anterior margin. 
Previously found in Wellington Harbour, New Zealand. Occurrence.—No. 59: 
(12th December, 1912), 1,320 fathoms. 
.Genus BytHocyTHERE G. O. Sars. 
ByTHOCYTHERE ILEX sp. nov. Plate XXII, fig. 7, 7a. 
Description —Carapace elongately ovate, compressed at the extremities. Seen 
from the side, highest in the middle; anteriorly broad and depressed, posteriorly 
