IN LIBERIA. 249 



species, but little decollated, whorls rather flat, sloping, 

 sometimes a little scalariform ; suture, except iii the last 

 case, not deep; the whorls are more or less carinated , their 

 number amounts to 7, last whorl a little inflated, obscurely 

 carinated. Aperture elongate ovate , angular above , efi'used 

 beneath. Interior of the aperture bluish white , outer mar- 

 gin, in the adult, with a black rim. Columella arched. Oper- 

 culum paucispiral. 



Alt. 25, lat. 9^2 ; alt. of apert. 8, lat. 5 mill. 



On rocks in the St. Paul's River 'near Bavia. 



Allied to the preceding species, but recognisable by the 

 conical shape and flatter whorls. It may be distinguished 

 from decollata and nigritina by the shape of the aperture. 



16. Melania Büitikoferi, n. sp. — Shell small, rather 

 shortly conical , decollated , colour yellowish olive , with a 

 broad blackish band at the periphery and another round 

 the base, (one specimen, larger than the others but rather 

 defect , is blackish) , sculpture : numerous thread-like lines 

 of growth and spiral cords, of which there are about 10 

 on the last whorl and 4 on the penultimate one, these 

 cords are all or partially darker than the rest; whorls about 

 3 in number, rather inflated, with a well marked suture. 

 Aperture ovately oblong , angular above , more or less efi'used 

 beneath. Columella tortile. Interior of the aperture bluish 

 white. 



Alt. 13, lat. 8; alt. of aperture 7, lat. 4^/4 mill.; of 

 the large specimen 12:9^/2; 8:5^/3. 



On rocks in the St. Paul's River near Bavia. 



Easily distinguished from the two preceding species , by 

 the short, conical shape and the regular spiral cords. 



It is on the authority of Dr. Brot , that I have ventured 

 to describe these three forms as new. 



17. Claviger auritus Miill. — One specimen without ex- 

 act locality, and another collected by Stampfli on the Junk 

 River. 



18. Claviger Matoni Gray, var. loricata Reeve. — Several 

 specimens from Grand Cape Mount. 



Notes from the Leyden IMuseuin, ~Vol. X. 



