Catalogue of the Marine Shells of Victoria. 197 



Family Columbellid^. 

 Genus Columbella, Lamarck, 1799. 

 CoLUMBELLA SEMicoNVEXA, Lamarck. 



1822. Buccinum semiconvexum, Lamarck. Anim. S. 



Vert., 2nd ed., vol. x., p. 171. 

 1847. Columbella semiconvexa, Sowerby. Thes. Conch., 

 vol. i., pi. 38, f. 103, 104. 



1858. Columbella semiconvexa, Reeve. Conch. Icon., 



vol. xi., pi. 18, f. 95a. b. 



1859. Columbella strigata, Reeve. Id., pi. 25, f. 154. 

 1859. Columbella rosacea, Reeve. M, pi. 29, f. 183. 

 1865. Columbella yorkensis, Crosse. Jour. d. Conch., 



p. 55, pi. 2, f. 6. 

 1883. Columbella semiconvexa, Tryon. Man. Conch., 



vol. v., p. 125, pi 48, f. 87-89. 

 1883. Columbella broderipii, Tryon (non Sowerby). Id., 



p. 114, pi. 46, f. 26. 

 1892. Columbella (Mitrella) semiconvexa, Kobelt. Conch. 

 Cab. (ed. Kuster), p. 81-83, pi. 11, f. 10-18 

 (not f. 13). 

 Hab. — Coast generally. 



Obs. — The commonest species found on our shores. It differs 

 greatly in size; in length from 21 nmi. to 8 mm., and in breadth 

 from 7 mm. to 3 mm. ; specimens measuring 16 mm. in length 

 sometimes are met with that attain to the maximum of 7 ram. in 

 breadth ; and the shell varies in colour, from a uniform white to 

 brown with darker markings. This species in South Australia 

 is generally somewhat narrower in form, and in New South 

 Wales does not attain to such a large size as elsewhere. 



We cannot follow G. F. Angas (P.Z.S. Lond., 1867, p. 194) in 

 accepting C. saccharata. Reeve, Conch. Icon., vol. xi., pi. 29, f. 

 187, as a synonym, as the figure of that species is of a more 

 acuminate shell than is exhibited by any specimen of the many 

 hundreds that we have examined from Victoria, New South 

 Wales or South Australia. 



We refer to C. rosacea as a synonym, but the specimen figured 

 is an unusually small one of C. semiconvexa, and the figure shows 

 an abnormal development of the upper denticle. 



