278 THE VOYAGE OF H.M.S. CHALLENGER. 



This is a more fragile species than the northern Crenclla decussata of Montagu, moi-f 

 shouldered above, more finely sculptured, and different in its hinge, but not sufficiently so 

 to warrant a generic separation. 



Modiolaria, Beck. 



Modiolaria lanigera (Dunker). \ 



Litlwdonius laniger, (Dunker MS.), Eeeve, Conch. Icon., vol. .x. pi. v. fig. .30. 



Lithodomus harbatus, Reeve, loc. cit., fig. 27. 



Modiolaria harhata, Angas, Proc. Zool. Soe. Lond., 1867, p. 911, pi. sliv. tig. 12. 



Habitat. — Port Jackson, in 2 to 10 fathoms (Challenger) ; Sydney (Reeve) ; Botany 

 Bay, New South Wales (Angas). 



I fail to appreciate the diiferences between the above species. Angus was evidently 

 misled by Reeve having described this shell as a Lithodomus. 



Modiolaria cumingiana, Dunker. 



Modiola cumingiana, (Dunker M.S.), Reeve, Conch. Icon., vol. x. pi. ix. figs. 6.3, a, h, sp. 50. 

 Crenella {Modiolaria) ciuinnijiana, Angas, Proc. Zool. Soc. Lond., 18G.5, p. 6.53. 



Habitat. — Port Jackson, Sydney, in 2 to 10 fathoms. 



This species has also been found at Moreton Bay on the east coast of Australia (Reeve), 

 at Swan River on the west coast (British Museum), and at St. Vincent's Gulf, on the south 

 coast, amongst Zostera, in 1 to 3 fathoms (Angas), and finally in Mr. Cuming's collection 

 there is a pretty pink variety labelled as having come from the Red Sea. 



Modiolaria varicosa, Gould. 



Modiolaria varicosa, Gould, Proc. Boston Soc. Nat. Hist., 1861, vol. viii. p. 37 ; Otia Conch., 



p. 176. 

 Modiolaria varicosa. Smith, Report on "Alert" Collections, p. 109, pi. vii. tigs. M, M'. 

 Modiola strigata, (Young) Reeve, Conch. Icon., vol. x. pi. xi. fig. 83. 



Habitat. — Port Jackson, Sydney, 2 to 10 fathoms. 



This species has not, I believe, been as yet noticed from any other than the Sydney 

 district. 



Modiolaria cuneata, Gould (PI. XVI. figs. 7~7a). 



Modiolaria cuneata, Gould, Proc. Boston Soc. Nat. Hist., 1861, vol. viii. p. 38 ; Otia Conch., 

 p. 176. 



Habitat. — Port Jackson, Sydney, in 6 to 15 fathoms (Challenger); False Bay, Cape 

 of Good Hope (Gould). 



