274 



243. Kachisellus bengalensis, Lamarck. 



Bulimus bengalensis, Lamarck, Anim. sans Vert, vi, part 2, 1822, 



p. 124; Deshayes, ibid., ed. 2, viii, 1838, p. 233; Delessert, 



Recueil Coq. 1841, pi. 28, fig. 4 ; Pfeiffer, Mon. Helic. Viv. ii, 



1848, p. 194; Reeve, Conch. Icon, v, 1848, Bulimus, pi. 45, 



fig. 289 ; Hanley & Theobald, Conch. Ind. 1874, pi. 80, fig. 7 ; 



ibid., 1875, pi. 148, fig. 6. 

 Bulimus (Mesembrinus) bengalensis, Pfeiffer, Malak. Blatt. ii, 1856, 



p. 158. 

 Bulimus (Rhachis) bengalensis, von Martens, Die Heliceen, ed. 2, 



1860, p. 231. 

 Buliminus (Rhachis) bengalensis, Nevill, Hand List, i, 1878, p. 130); 



Kobelt, Conch.-Cab., Fam. Buliminidae, 1900, p. 668, pi. 102, 



figs. 8, 9. 

 Bulimina (Rachis) bengalensis, Pfeiffer & Clessin, Nomencl. Helic. 



Viv. 1881, p. 285. 

 Buliminus (Rachis) bengalensis, Jousseaume, M6m. Soc. Zool. 



France, vii, 1894, p. 296 ; Peile, Journ. Bombay Nat. Hist. Soc. 



xi, 1908, p. 131. 

 Rhachis bengalensis, Kobelt & Mollendorff, Nachr. Deuts. Malak. 



Ges. 1903, p. 37. 



" H. testa ovato-acuta, perforata, tenui, diaphana, glabra, albo- 

 lutescente, fusco-fasciata, ultimo anfractu subventricoso, bifasciato; 

 suturis linea nigra marginalia ; labro subreflexo." (Deshayes.) 



Long. 10 lin. 



Hob. India : Bengal (Deshayes) ; Bombay (Peile) Chittagong 

 (Eaban) ; Raneegunge (Stoliczka) ; Chaudernagore, Calcutta, 

 Barrackpore (Nevill, Maimvaring) ; Bengal and Anamullays 

 {Beddome). 



The foregoing brief description may be supplemented as 

 follows : 



Shell perforated, ovate - acute, thin, diaphanous, smooth, 

 yellowish-white, usually encircled by two, rarely three, bands, 

 one bordering the suture. Spire conical, apex acute, black. 

 Whorls 6, slightly flattened, the last convex, about equalling the 

 remainder of the shell in height. Aperture spacious, oval ; peri- 

 stome simple, acute, columellar margin dilated. 



Long. 22, diam. 10 mm. 



The present species may be distinguished from its nearest ally 

 R. prceter missus by its broader base and more conoid spire. It 

 is, besides, usually paler in colour and is furnished with dense 

 minute spirals, a feature I have not observed in the other species. 

 It is thinner in texture than either E. pulcher or E. adumbratus. 

 The third and fourth bands are most persistent, but many speci- 

 mens have the second band represented by a thin line. Seven 

 specimens from the Anamullays, in the Beddome collection, 

 labelled prcetermissa, I refer to bengalensis. The Theobald 

 collection contains six specimens, labelled Bengal, three of which 

 are immature and possess four bands ; three others have three 

 bands interrupted transversely, the third becoming entire towards 

 the aperture. 



