NEW LANDSilELlvS FROM THE SMITHSONIAN 

 AFRICAN EXPEDITION 



Bv VVirjJAM IIKALEY DALL 



The landshells collected by the Smithsonian African Expedition, 

 under the direction of Col. Theodore Roosevelt, were chiefly of the 

 characteristic East African types, LAmicoJaria and the like, which 

 will take a good deal of careful study to work out, since the species 

 are variable and many names have been applied to them. It ap- 

 pears, however, that there are three species which are undc- 

 scribed and sufficiently well marked to render descriptions desirable 

 in advance of the proposed general report on the collection. Two 

 of these belong to a special group mnler BnJ'nuinus (senso lato). and 

 the other is a Limicolaria. 



Fig. I 

 BULIMINUS ROOSEVELTI. new species (Fig. i) 



Shell short, stout, solid, the last whorl much the largest, the color 

 varying from a vinose purple-brown to opaque white ; nucleus of 

 about three whorls, smooth and polished, merging, without marked 

 interruption, into the sculpture of the four subsequent whorls ; these 

 have minute retractive wrinkles, feebly fascictilated, stronger and 

 more distant on the early whorls, closer and finer on the later ones, 

 with an obscure tendency toward minute puckering at the suture; 

 these axial wrinkles are broken into granules or segments on the 

 last two whorls by spiral depressed lines, to which are added on the 

 last h;ilf of the last whorl more or less irregular, sometmies angular. 



Smithsonian Miscellaneous Collections, Vol. 56, No. 10 



