98 A". J. Bush — Marine Gastropods referred to 



These inadequate descriptions and want of knowledge of the 

 operculum, animal and odontophore of the type, together with the. 

 fact that Marry att stated that Flelix depressa and Ilelix serjndoides 

 were referable to the same genus, have doubtless led to the greater 

 part of the confusion into which the genus has fallen. 



As its true position cannot at present be decided, it seems best to 

 follow the authors who have studied similar species. S. P. Wood- 

 ward (1851-6) placed the genus in the family Turbinidae, with Liotia 

 Gray (1850), and Gollonia Gray (1850), as subgenera of Delpjhinula 

 (Roissy) Lam. The figure he gives as cancellata, however, does 

 not agree very closely with those of Marryatt and the locality of 

 the species is given as the Philippines. H. and A. Adams (1858) 

 placed it next Liotia in the family Liotiinte and added two sub- 

 genera, Cynisca H. and A. Adams and Serpularia Romer, 1843 

 (? Spira Brown, 1838), See pages 10*7, 108. The original figure that is 

 given as cancellata, however, represents a very different species, as 

 do also those given by Chenu in his Manual, and by A. Adams in 

 Sowerby's Thes. Conch., copied by Tryon. 



The following extract from a letter from Mr. E. A. Smith, of the 

 British Museum, under the date of May 7th, corroborates this 

 opinion. 



" The shell figured by H. and A. Adams (Gen. Rec. Moll, pi. xlv, 

 f. 6«. and in Sowerby's Thesaurus, iii, pi. 255, figs. 5, 6), in my 

 opinion is perfectly distinct from Marryatt's Cyclostrema cancellata, 

 and I have long ago noted this. 



Kiener's Delphinida cancellata (Icon. Coq. Viv., p. 10, pi. iv, f. 10) 

 = Kieneri Phil, is, I consider, Marryatt's species. It is curious that 

 both employed the same specific name. I do not know that the 

 shell figured by Adams has been renamed," etc. 



The only reference that I have found regarding this difference is 

 in Trj'on's Manual, x, p. 89, 1888, where it is suggested that the 

 Philippine specimens, as figured by Sowerby, may prove to be iden- 

 tical with Cyclostrema eburnea Nevill, from the Bay of Bengal. 

 The figures 27-30, as given on pi. 31, look very unlike, and I very 

 much doubt the accuracy of such a combination. For the species 

 figured as C. cancellata by H. and A. Adams and copied by Chenu, 

 I propose the specific name jyseudocancellata. I very seriously ques- 

 tion its rightful reference to the genus Cyclostrema, however, but 

 such a question must be left to the future study of the authentic 

 specimens. Whether or not the description given by A. Adams, 

 P. Z. S., p. 41, February, 1850, refers to the same species that is 



