356 OYCLOPHOEIDJE. 



Shell narrowly umbilicated or perforate, turreted or globose- 

 turbinate, keeled around the umbilical perforation ; aperture ovate, 

 peristome not continuous, straight or slightly reflected. Oper- 

 culum thin, corneous, paucispiral, subovate, angular; nucleus 

 excentric. 



548. Omphalotropis andersoni, Blanfonl. 



Mealia (Omphalotropis) andersoni, Blanford, J. A. S. B. xlix, 



part 2, 1880, p. 210, pi. 2, fig. 18. 

 Onip/ialotropis (Euri/tropns) andersoni, Kobelt & Mcillendorff, 



Naclir. Dents. 3Iaiak. Ges. xxx, 1898, p. 148 ; id., Cat. Pneum. 



1809, p. G8. 



Original description : — " Shell perforate, ovately conical, thin, 

 reddish brown in colour, smooth, not polished, obliquely striated. 

 Spire conical, \\itlt sides nearly straight, apex acute, suture slightly 

 impressed. Whorls 7, rather flat ; the last with a hair-like keel 

 at the periphery (the keel sometimes appearing on the upper 

 whorls just above the suture), convex, smooth, and radiately 

 striated below, and furnished with an obtuse, subobsolete keel 

 around the umbilicus, the space inside the umbilical keel being 

 smooth, not ribbed. Aperture ovate, oblique, nearly diagonal, 

 a little shorter than the spire. Peristome obtuse, the margins 

 approaching each other, and joined by a thin callus ; outer edge 

 straight, basal expanded, columellar expanded below, but emarginate 

 and cut away into a re-entering angle near the perforation. 

 Operculum ? 



"Len"-th 7, diam. 5; length of aperture 3j, breadth 2| mm." 

 {Blanford.) 



Hah. Andaman Is. {Anderson). 



This species is stated closely to resemble 0. rid>ens of Mauritius 

 in form, but to differ in sculpture, the shape of the whorls, etc. 

 The umbilical keel is but faintly marked. 



549. Omphalotropis aurantiaca, Deslunjes. 



Cyclostoma anrnntiaca, Deshayes, in Eelanger, Voy. lud. Orient. 

 'Zoologie, 18M2, p. 410, pi. 1, figs. 10, 17 : id., in Lamarck, Hist. 



Nat. Anim. s. vert. Ed. 2, viii, 1838, p. 373. 

 Ci/clostoma helanf/eri, Pfeiffer, Zeits. Malak. iii, 1840, p. 82; id., 



' Conch.-Cab., Cyclostomaceen, 1849, p. 181, pi. 30, figs. 1-3. 

 ITi/drocena hidangeri, Pfeiffer, Zeits. Malak. iv, 1847, p. 112. 

 Realia belangeri, (^iray, Nomencl. Moll. Brit. Mus. part 1, 



Cyclophorida^, 18-50, p. 03. 

 Omphalotropis aurantiaca, Pfeiffer, Zeits. Malak. viii, IS.^l, p. 177 ; 



id., Proc. Zool. Soc. 18o2, p. 151 ; id., Mon. Pneuni. 1852, p. 309 ; 



Adams, ({en. Piec. Moll, ii, 1854, p. 300 ; Pease, Journ. Conchyl. 



xvii, 1809, p. 143 ; Theobakl, Cat. Shells Brit. India, 1870, p. 15. 

 RcaJia aurantiaca. Gray, Cat. Phaneropn. Brit. Mus. 1852, p. 220. 

 Hi/drocena (Onijihalofropis) aiiranfiaca, PfeifTer, Proc. Zool. Soc. 



1854, p. 307: id., Mon. Pncnm. Suppl. 1, 1858, p. 107. 

 liea/ia {Omphalotropis) aiirnniiaca, Pfeiffer, Mon. Pneum. Suppl. 3, 



1875, p. 231. 



