42, AUSTRALASIAN ANTARCTIC EXPEDITION. 
Famity CYTHERELLIDA, 
Genus CYTHERELLA Rupert Jones. 
CYTHERELLA IRREGULARIS G.S. Brady, var.; DEBILIS var.nov. Plate XXII, figs. 11, 1la. 
Ref. to type—Cytherella irregularis G. 8. Brady, 1880, Rep. Chall. Zool., vol. L, 
pt. III, p. 178, pl. XLII, figs. 3a-c. 
Observations —Three valves of what appear to be a weakly-sculptured variety 
of the above species occur in the Tasmanian area. The central raised portion of the 
valve is not so conspicuously pinched up nor is the pitting so marked, as in C. irregularas. 
The type species occurred off Bermudas. 
Occurrence.—No. 59 (12th December, 1912), 1,320 fathoms. 
CYTHERELLA PUNCTATA (. S. Brady. 
Cytherella punctata G. S. Brady, 1866, Trans. Zool. Soc. Lond., vol. V, p. 362,. 
pl. LVII, figs. 2a,6. Idem, 1880, Rep. Chall. Zool., vol. I, pt. III, p. 174, pl. XXXVI, 
figs. 6a, b; pl. XLIV, figs. 4a-g. Egger, 1901, Abhandl. d. k. bayer. Ak. Wiss., vol. XX, 
pt. Il, p. 469, pl. IV, figs. 34, 35. Chapman, 1914, Proc. R. Soc. Vict., vol. XXVII 
(NS.), pt. I, p. 51, pl. IX, fig. 47. 
Observations —The present occurrences are from the Tasmanian area. Its. 
range extends from the Ki Islands to the Southern Ocean, and is known also from the 
Straits of Magellan. It occurs as a fossil in the Miocene or Lower Pliocene of the Mallee 
Bores in Victoria. 
Occurrence—No. 58 (11th December, 1912), 1,180 fathoms. No. 60 (12th 
December, 1912), 1,300 fathoms. 
