66* "endeavour" scientific results. 



it is now advanced for admission. Tlie anatomical details 

 given by Parker and Haswell 1 for Triton nodiferus refer to 

 ( 'haronia rubicunda. 



From a depth of a hundred fathoms in the Great Australian 

 Bight, Dr. Verco has recorded a form of Cymatium rubicundum, 

 Perry, 2 representatives from there and from further west 

 prompted the present enquiry. 1 regard these shells as a variety 

 not of C. rubicunda but of G. nodifera. The Australian 

 outlier is rather nearer the Japanese C. saulice, Reeve, than 

 the European expression of the species. Compared with 

 specimens from Marseilles, the West Australian variety has 

 stronger wrinkles on the arch of the inner lip, but weaker 

 transverse folds on the base of the columella near the canal, it is 

 more slender especially as regards the spire, and the nodules are 

 closer and more prominent. From C. saidire, as figured by 

 Lischke, 3 the Australian shells differ by more slender form, by 

 smaller, closer and more prominent nodules, but agree generally 

 in the armature of the aperture. The example here figured is 

 22 centimm. long and half as broad, and for this West Australian 

 variety I now propose the name of C. nodifera var. euclia. 

 Since writing the above a series has been received from the 

 " Endeavour," trawled off the South East Coast. 



Reviewing the whole group, Dr. W. H. Dall separated from 

 the other Tritons, a genus Septa, distinguished by an operculum 

 with a subcentral internal nucleus and by a laterally extended 

 rachidiaii tooth with a median inflection in front, but without 

 basal plates. Recently Mathews and Iredale 4 have shown that 

 Septa, Perry origiually had for its type, Septa scarlatina, Perry 

 (=Murex rubectda, Linn.) and not Triton, tritonis, as was 

 generally supposed. Commenting on this discovery, Dr. Dall 

 remarks 5 that " the first name available for the group typified by 

 Murex tritonis, L., seems to be Nyctiloehits of Gistel, L848." 

 On further investigation Iredale found Nyctilochus to apply to 

 Cymatium or Fusus and recommended Charonia, Gistel, as pro- 

 posed for Murex tritonis, L. alone 6 This name is accordingly 

 here adopted. 



1 Parker and Haswell — Textbook of Zoology, i, 1910, pp. 721-732, 

 figs. 608-618. 



2 Verco— Trans. Roy. Soc. S. Austi-., xxxvi., 1912, p. 218. 



3 Lischke — Jap. Mar. Conch., ii., 1871, p. 33, pis. i. & ii. 

 •1 Mathews and Iredale — Vict. Nat., xxix., 1912, p. 9. 



5 Dall. — Nautilus, xxvi., 1912, p. 58. 



6 Iredale — Nautilus, xxvii., 1913. p. 55. 



