248 ZOOLOGICAL RESEARCHES 



whorl rounded, with only a slight indication of an angle. 

 Aperture nearly semicircular, a little effused beneath. Colu- 

 mella nearly straight, forming an obtuse angle with the 

 under margin. Interior of the aperture bluish white, with 

 a black margin all around. 



Alt. 24, lat. 19; alt. of aperture 15, lat. 10 mill. 



Found on rocks in the St. Paul's River near Bavia. 



Of this shell there is only one good specimen , the others 

 are more or less bleached or broken. They give however a 

 good idea of the species , which is remarkable by the angle 

 of the under part of the aperture. 



13. Melania nigritina Mor. — A few specimens of a 

 rather small form , with the spiral striae not much develo- 

 ped , but sufficiently visible , after having been well cleaned, 

 to distinguish it from the allied Guineensis Reeve. — Found 

 near Hill-town. 



14. Melania Sancti-Pauli, n. sp. — Shell cylindrically 

 turreted , with numerous lines of growth decussated by spi- 

 ral ridges which vary much in number (from 1 — 6 on 

 the penultimate whorl), nearly wanting in some speci- 

 mens; the upper whorls obscurely carinated, and the shell 

 often a little granulated ; colour dark olive green , with 

 a brownish tint and in some specimens with a dark band. 

 Spire much decollated, persisting whorls about 4, much 

 inflated, but little increasing in height and breadth, su- 

 ture deep , last whorl still more inflated , rounded. Aperture 

 small , ovately oblong, angular above, effused beneath. Colu- 

 mella arched; interior of the aperture bluish white, outer 

 margin, in the adult, with a black rim. Operculum pau- 

 cispiral. 



Alt. 22, lat. 9^2 ; alt. of aperture 7, lat. 5 mill. 



Found on rocks in the St. Paul's River near Bavia. 



This species differs from the following and from M. ni- 

 gritina Mor. chiefly by the inflated whorls and the cylin- 

 drical shape, from M. decoUata by the effused aperture. 



15. Melania Liheriensis , n. sp. — Shell oblong, conical, 

 sculpture and colour very similar to that of the preceding 



J^otes from tlie Leyden Miuseuxn , Vol. X. 



