MOLLUSCA FROM EI-'UriY FATHOMS — IIKDLEY. 299 



This species is already known from Tasmania, Soutli Australia 

 and Victoria. Two individuals in the present haul extend the 

 known ran:;e t<J this State. 



Cavolinia lonctIKOSTrih, Li'sueur, var. stkanuulata, var nov. 



(Plate liv., fig. 1.3). 



This differs from the typical form by sudden lateral contraction 

 of the rostrum, which distally expands in a spout. In the typical 

 form the rostrum is produced more gradually from the anterior 

 dorsal margin than in the variety. In var. straiujidata the pos- 

 terior lateral angles are less developed. Nearest stands the var. 

 aiujiiJdtd, 8ouleyet,'^^ which has the rostrum not spread distally, 

 and contracted from back to front instead of from side to side, it 

 also agrees in the diminutive posterior angles. Boas states" that 

 he has traced amjuhifa through a series of transitions into Joutji- 

 rosti'is. But this should not reduce a well-marked variety to an 

 absolute synonym. 8ouleyet's form also occurs on the coast 

 of M. S. Wales. 



I have not met this variety alive, and only know it from dead 

 specimens di-edged from the bottom. Besides the present station 

 it has occurred at sixteen miles east of Wollongojig, and twenty- 

 three miles east of Sydney. Exain^ijles from the neighbourhood of 

 th.e Great Barrier Island, New Zealand, are i-eferred to'-'* as a vari- 

 ation of ('. Jomiirostris. Y-av stiruKjithifa seems a southern form. 

 Though typical ('. loinjirostris has occurred to me plentifully 

 along tlie Queensland Coast, as at the Palm Islands, Green 

 Islanfl and Thursday Island, I have not seen the variety fi'om 

 the north nor the typical form from tlie south of Sydney. 



()xy(;yrus keraudkenii, Lesueur, sp. 



Afhriitd, k''ratidreuii, Lesueur, Journ. de Phys., Ixxxv., LSI 7, p. 

 391, pi. ii. Oxi/(/i/n(s kerandrfniii, Smith, Chall. Rep., Zool., 

 xxiii., 1888, p. 16. 



Two imperfect specimens were taken on this trip. Previously 

 the " Thetis'" had obtaiaed fragmsnts of it off Port Kemblain G.i- 

 75 fathoms, and, in company with Mr. W. F. Petterd, I dredged 

 another broken shell, twenty-three miles east of Sydney. The 

 genus seems to be unknown hitherto from Australian waters. 



21 Soulevct Zool. Boiiite., ii , 1H.52, p. 1.j2, pi. v., f. 1-6. 



'" Boas— Spolia Atlantica, IsHC, p. 211. 



"^ Hedley -Trans. X. Z. Inst., xxxviii., 1906, j). 76. 



