with descriptions of some new species. 271 



5. Cyclostoma Wahlbergiy nobis, n. s. 



Testa mediocriter umbilicata, depresso-turbinata, scabre et acute ra- 

 diato-striata, luteo-glauca, epidermide fusca; spira vix elevata, 

 acutiuscula ; anfractibus 4 convexis, ultimo rotundato ; apertura 

 ampla, alta, rotundata, peristomate acuto ; umbilico aperto, pro- 

 fundo. f 



Diam. major 14, minor 11, axis 7 mill. / \ (■ ;■ ^ ■:-■ ^ i^ 



This is probably the species which Wahlberg got at Natal, and 

 which, by some misconception, was attributed to the fauna of 

 South Africa, by Krauss, as C. translucidum, a South American 

 shell possessed of a calcareous operculum ; whereas that of the 

 present species is thin and horny. The example described was 

 collected at Natal, with Bulimus Kraussi, and transmitted to 

 Mr. S. Stevens with other specimens of a smaller size. 



Cyclostoma Phcenotopicum, Benson, Annals, vol. viii. p. 190. 



The following characters require to be added to the previous 

 description of the shell, of which I have received an adult speci- 

 men from Darjiling : — 



Peristomate verticali, integro, expansiusculo, subreflexo, supeme du- 

 plicate, lamella exteriori ibidem subangulata. 

 Diam. major 13, minor 10, axis 6\ mill. 



Besides the figure of C. spiraculum, Sowerby, No. 272 of the 

 ' Thesaurus,' which is Pterocyclos hispidus [Spiraculum hispidum 

 of Pearson), Sowerby added No. 273, a figure of a small shell, 

 also from India, which he referred to the same species. It was, 

 however, destitute of the spiracle and with a different aperture, 

 and was so clearly distinct that it has been referred by several 

 authors to other species. In the 'Conchylien Cabinet' Pfeiffer 

 assigned it, at first, with a mark of doubt, as well as C. Papua, 

 Quoy, to C. helicinum, Chemnitz; although he afterwards saw 

 reason to distinguish C. helicinum from C. Papua y which he now 

 refers, together with C. Distomella, Sowerby (a very different 

 shell ?), to C. Hebraicum, Lesson. Gray also attributes fig. 273 

 of the * Thesaurus,' with a mark of doubt, to C. Papua, A glance 

 at the figure. Conch. Cab. pi. 28. f. 14-15, would at once dis- 

 pose of this reference ; while I have no hesitation in referring 

 the stray form in the ' Thesaurus ' to an uncoated specimen of 

 C. Phanotopicum, with which its size, form, zigzag markings, 

 and conformation of the mouth exactly agree. 



Cyclostoma constrictum, Benson, Annals, vol. viii. p. 188. 



Another specimen of this shell from Darjiling confirms an ad- 

 ditional character for this species, tending still further to show 



