36 AUSTRALASIAN ANTARCTIC EXPEDITION. 
Australia (The Great Bight), and from west of Tasmania. A related form is the recently 
described Lower Pliocene fossil, C. prwantarcticum from the Mallee Bores in Victoria’; 
this has a heavier carapace with broader and less sharply pointed alar process. 
Occurrence—Additional Sample (8rd September, 1912), 706 fathoms. No. 59 
(12th December, 1912), 1,320 fathoms. No. 60 (12th December, 1912), 1,300: 
fathoms. 
CYTHEROPTERON ARMATUM Chapman sp., var. SPINOSA nov. Plate XXII, figs. 4, 4a. 
Description.—In. general characters this variety agrees with the type form from 
Funafut® with the exception that in the present example the anterior extremity is. 
narrower, whilst the raised area between the pittings is finely spinose. 
Observations —Both, the type form and the variety are related to Cytheropteron. 
pedatum Marsson sp.* from the Chalk of England, Ireland and Riigen, and which Dr.. 
Egger has already recorded? off Australia at 357 metres. 
Occurrence.—No. 30 (15th February, 1912), 182 fathoms. 
CYTHEROPTERON ASSIMILE G. S. Brady. 
Cytheropteron assimile G. 8. Brady, 1880, Rep. Chall. Zool., vol. I, pt. III, p. 138,. 
pl. XXXIV, figs. 3a-d. Chapman, 1902, Journ. Linn. Soc. Lond, Zool., vol. XXVIII, 
p. 431. | 
Observations.—This species is nearly related to C. abyssorum. A variety has. 
been described from Funafuti dredgings in which the alar beak is produced into a sharp 
spine. 
The habitat of the above species is practically confined to the Southern Ocean. 
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. No. 60 (12th December, 1912), 1,300 fathoms.. 
No. 139 (27th January, 1914), 328 fathoms. 
CYTHEROPTERON COCCOIDES G. S. Brady. 
Cytheropteron coccoides G. S. Brady, 1890, Trans. R. Soc. Edin., vol. XXXV,. 
p- 510, pl. III, figs. 20, 21. Chapman, 1915, Sci. Res. “ Endeavour,” vol. III, pt. 1, 
p 47. - 
Observations.—Previously found in sand from the fringing reef of Mango Island, 
Fiji, and East of Tasmania (777 fathoms). The present specimen, a complete carapace, 
was taken near the Ice-barrier. 
Occurrence.—No. 30 (15th February, 1912), 182 fathoms. 
1Chapman, Proc, Roy. Soc, Vict., vol. XXVII (N.S.), pt. I, 1914, p. 47, pl. IX, figs. 39a, b, 
2Journ. Linn. Soc. Lond. Zool., vol XXX, 1910 p. 432, pl. XX XVII, figs. 6a, b. 
’Cythere pedata Marsson. Mittheil. Naturw. Ver. Neu-Pommern und Riigen, Jahrg. XII (1880), p. 46, pl. III;. 
figs ae Cytheropteron pedatum Marsson sp., Jones and Hinde, Pal. Soc. Mon., vol. XLIII, 1890, p. 38, pl. IV,. 
igs. 33-35. 
sAbhandl, d. k, bayer. Akad, Wiss., vol. XXI, pt. II, 1901, p. 462, pl. VII, figs. 10-12. 
