REPORT ON THE GASTEROPODA. 51 



2. Trochus (Clanculus) clangulus, Wood. 



Trochus clangulus, Wood, 1828, Intl. Test. Suppl. (ed. Hanley), p. 221, pi. v. fig. 31. 



„ „ Philippi in Conch. Cab. (ed. Kiister), p. 239, sp. 304, pi. xxxvi. fig. 8. 



Trochus floridus, Philippi in Menke's Zeitschr., 1849, p. 156, and in Conch. Cab. (ed Kiister), p. 243, 



pi. 36, fig. 15. 

 Clanculus floridus, A. Adams, Monog. Trochid., Proc. Zool. Soc. Lond., 1851, p. 158, sp. 5. 

 Trochus clangulus, Fischer in Kiener's Iconog., p. 234, No. 123, pi. lxxxi. fig, 1. 



April 17-18, 1874. Port Jackson, Sydney. 2 to 10 fathoms. 

 May 1874. Port Jackson, Sydney. 6 to 7 fathoms. 



Habitat. — Australia, New South Wales (Fischer), Tasmania (Brit. Mus.) 



That this species, which is conical, fairly angulated, and has a pervious umbilicus, should be 

 classed by Adams as a Clanculus, of which he says in his diagnosis that the " shell is conoidal or 

 turbinate, axis imperforate " while the " columella forms a false umbilicus," is a fact somewhat striking, 

 but far from unexampled in the history of generic subdivision. For myself, I simply quote Adams 

 here as elsewhere for these sub-genera, leaving the responsibility of them on those who admire them. 

 Dr Fischer quotes Mr Angas as having supplied him with numerous specimens of this species from 

 New South Wales, but I have failed to find the species in any of that author's Australian lists. 



3. Trochus [Clanculus) hornalomphalus, A. Adams. 



Clanculus omalomphalus, A. Ad., Monog. Trochid., Proc. Zool. Soc. Lond., 1851, p. 162, sp. 44. 



„ „ Adams, Genera, vol. i. p. 416. 



„ „ Angas, Port Jackson Moll., Proc. ZooL Soc. Lond., 1867, p. 214, No. 178. 



Trochus hornalomphalus, Fischer in Kiener's Iconog., p. 235, sp. 124, pi. lxxxi. fig. 2. 



April 17-18, 1874. Port Jackson, Sydney. 2 to 10 fathoms. 

 April 23, 1874. Port Jackson, Sydney. 6 to 15 fathoms. 

 May 1874. Port Jackson, Sydney. 6 to 7 fathoms. 



Habitat. — Port Jackson, Sydney (Angas). 



The spelling of this name as given by Fischer probably represents what Adams meant to convey, 

 viz., the smoothness of the umbilicus, a feature one would hardly expect in a genus defined by the 

 Messrs Adams (see Genera, voL i. p. 415) as having the "axis imperforate" and the columella 

 " forming a false umbilicus with a crenate margin." The periphery, too, so far from being rounded, 

 is very sharply angulated, and the shell is distinctly conical. In this and other cases I simply follow 

 the classification, which some persons seem to find useful, however little so it seems to myself. 



4. Trochus (Clanculus) maugeri, Wood. 



Trochus Maugeri, Wood, Ind. Test. Suppl. (ed. Hanley), p. 220, pi. v. fig. 27. 



„ „ Philippi in Conch. Cab. (ed. Kiister), p. 240, sp. 305, pi. xxxvi. fig. 9. 



Clanculus Maugeri, A. Adams, Monog. Trochid., Proc. Zool. Soc. Lond., 1851, p. 158, sp. 4. 



Angas, Port Jackson Moll., Proc. Zool. Soc. Lond., 1867, p. 214, No. 176. 

 Trochus Maugeri, Fischer in Kiener's Iconog., p. 218, sp. 113, pi. lxxii. fig. 1. 



April 17-18, 1874. Port Jackson, Sydney. 2 to 10 fathoms. 



