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ON THE GENUS TOMIGERUS, SPIX, WITH DESCRIPTIONS OF 

 NEW SPECIES. 



By Dr. H. von Ihering. 



Read Wth November, 1904. 



During last year I received some small but interesting collections 

 of land and fresh-water shells found by Mr. Francisco Dias da Eocha 

 at Fortaleza, Ceara. As I propose to deal more fully with the matter 

 again in another place, I have here only given descriptions of the new 

 species and added some remarks on the subdivision of the genus 

 Tomigerus. 



I. SPECIES COLLECTED BY MR. DIAS DA ROCHA. 



ToMiGEEUs LiEVis, n.sp. Fig. 2. 



Shell subglobose, not much distorted, with a straightened umbilical 

 suture, which is bordered with yellowish-brown, the rest of the shell 

 being white, shining, and somewhat transparent. Surface smooth, 

 sculptured only with faint growth-striae. Spire shortly conical ; 

 whorls 4^, convex, separated by a deep suture, the last distorted, 

 excavated behind the columellar lip, and having an oblique groove 



behind the outer lip. Aperture vertical, subtriangular, with three 

 small parietal lamellfe, of which the uppermost is bifid, and the 

 middle one very minute, almost obsolete. The baso-columellar margin 

 has three lamellae, and the outer lip a large obliquely-entering plate- 

 like fold within the outer margin, its upper end being bifid. Peristome 

 expanded, white. Alt. 10 mm. ; greater diam. 13, lesser diam. 9 mm. 



Tomigerus Rochai, n.sp. Fig. 1. 

 ^ Shell compressed-ovate, distorted as if by pressure on the apertural 

 side, imperforate, with a long straightened umbilical suture. Surface 

 sculptured with faint spiral impressed lines and with somewhat 

 irregular riblets, except on the last half- whorl, which is strono-ly 

 corrugated. Spire conic ; apex white ; whorls 5, nearly flat, the 

 last distorted, excavated behind the columellar lip, and havino- an 



