344 Mr. E. A. Smitli on Species o/'Bullidse. 



posed to be deficient. I communicated my suspicion to Dr. 

 Giintlier, Avho had the kindness to examine the conditions more 

 closely, by clearing away the soft parts, and confirmed my 

 conjecture. As regards the toothlessness of the palate, there- 

 fore, there is no difference between these two genera. 



XXXVI. — Remarks on several Species of BuUidse, with De- 

 scriptions of some hitherto undescribed Forms^ and of a nevj 

 Species of Planaxis. By Edgar A. Smith, Zoological 

 Department, British Museum. 



In comparing the specimens belonging to the family Bullidse 

 contained in the collection of the British Museum with the 

 monograph by A. Adams in the ' Thesaurus Conchyliorum,' 

 vol. ii., and with the monographs by Sowerby of various 

 genera included in this family in the ' Conchologia Iconica,' 

 vols. xvi. & xvii., I have met with some errors, chiefly in the 

 latter work, some of wliich I am enabled to correct, since the 

 typical specimens of many of the species described in these 

 publications are in the Cumingian collection, now in the 

 British Museum. 



A tys ferruginosa. 



Adams (Thes. Conch, ii. p. 585, pi. 124. f. 110) describes 

 and figures a shell from Cuming's collection, which he con- 

 siders the same as that figured by Martini, Conch. -Cab. i. 

 pi. 22. f. 209, 210, and assigns to it the name A. ferruginosa 

 of ChemnitZj which should be of Gmelin^ Syst. Nat. p. 3432. 



This is certainly an error ; for, as Dillwyn (Cat. Rec. Shells, 

 i. p. 477) has long ago intimated, the figure of Martini is 

 doubtless that of an immature Cyprcea. 



On careful examination of Adams's type, which only differs 

 from A. naucum in possessing longitudinal irregular brown 

 stripes, it proves to be but a small example of that species, 

 which has retained the epidermis, the whole of which might 

 be removed, and with it the markings, for they are only epi- 

 dermal. 



Atys cylindrica. 



Bulla cylindrica, Helblings, Chemn. Concli,-Cab. x. pi. 146. f. 1356-7. 



= Bulla solida, Brug. Enc. Meth. pi. 360. f. 2. 



= Atys elonyata, A. Ad. Thes. Concli. ii. p. 587, pi. 125. f. 121. 



These three forms are figured by Adams in the last-named 

 work. The latter two must be considered varieties of cy- 

 lindrica^ and, as their names imply, are respectively, the one 

 more solid and somewhat shorter than it, and the other more 



