CYCr.OTOPSIS.— OMPHALOTROl'IS. 355 



suture very slightly channeled ; aperture circular; peritreme thin, 

 whitish, slightly reflected, and spreading a little posteriorly over 

 the last volution ; uinhilicus very large, showing the four volutions 

 within." (Sotverhy.) 



Major diam. 17, uiin. 13 ; alt. 1U"5 mm. 



Fig. 40. — Ci/dotopi'is Mihdhcoidea. 



Ilah. S. ludia. 



The specimen here illustrated is in the British Museum. 



547. Cyclotopsis trailli, Pfelffer. 



Ci/clotus trailli, Pfeitfer, Proc. Zool. Soc. 1S62, p. 110, pi. li>, fio-.'4 ; 



Peeve, Conch. Icon, xiv, 1863, Cyc/(>?(/s, pi. 9, fiu-. o(i ;. Pfeitfer, 



Men. Pneum. Suppl. 2, I860, p. i>9. 

 Cifclostoma {Cyclotopsis) trailli, Nevill, Hand List, i, 1878, p. SOS 



(as synonym of C. subdiscoide.um). 

 Cyclotopsis trailli, Kobelt ifc Mullendorff, Nachr. Deuts. Malak. Ges. 



XXX, 1898, p. 157 ; id., Cat. Pneum, 1899, p. 77. 



Orir/iiial description: — "T. suhlateuinhilicata,depresso-turbinata, 

 solidula, liris confertis, subtus minoribus scnlpta, carneo-albida, 

 fusciilo-variegata, et fascia 1 rufa infraperipherica notata ; spira 

 breviter turbinata, acutiuscula ; anfr. 4i couvexi, celeriter accres- 

 centes, juxta suturam hTDvigati,ultimus teres, autice vix desceudens; 

 apertura obliqua, subangulato-circularis ; perist. tenue, vix expan- 

 siusculuni, ad anfr. contiguum subinterruptum.— Operc. Cycloti 

 subdiscoidei. 



" Diam. maj. 14, min. 12, alt. 10| mill." (Pfeiffer.) 



Ilnh. India: Eussel-Canda, Madras (T>Ya7/). 



Allied to C. siuhdiscoidea, !So\verby, but smaller, with a narrower 

 umbilicus, a higher spire, and the last whorl smooth near the 

 suture. 



Genus OMPHALOTROPIS, rfeiffer. 



Omphalotropis, Pfeifter, Zeits. Malak. viii, 1851, p. 176 ; id., Proc. 



Zool. Soc. 1852, p. 151 ; id., Men. Pneum. 1852, p. 300 ; id., cp. cit. 



Suppl. 2, 180-3, p. 175; Blanford, A. M. N. II. ser. 4, iii, 1869, 



p. 340 (radula) ; id., J. A. S. B. xliv, part 'I, 1875, p. 40; Fischer, 



IMan. Conchyl. 1885, p. 748. 

 Ilydrocena {Omphalotropis), Pfeiffer, Men. Pneum. Suppl. 1, 1858, 



p. 155. 

 Realia [Omphalotropiis) , Pfeiffer, Mod. Pneum. Suppl. 3, 1879, p. 209, 



Type (1st species), Cyclostoma auranliaca, Deshayes. 



Range. Mascarene Is., Andaman and Xicobar Is., S. India, 

 Malaysia, Polynesia. 



2 v 2 



