NO. lO NIvW r.AND S?TRLLS FROM KAST AFRICA DAfJ, 



Frr.. 3 

 LIMICOLARIA CATHARIA, new species ( 1' ig. ^) 



Shell slender, tliin, polished, smooth, with a very thin yellowish 

 periostracum (which is usually lost), milky white with narrow, 

 more or less undulated, brown axial lines, with much wider inter- 

 spaces, usually about fifteen or sixteen in number to the whorl ; 

 nucleus glassy, of two or three microscopically punctate whorls, 

 rather blunt at the apex ; followed by five or six subsequent slightly 

 convex whorls ; suture distinct, not deep ; surface apt to be pitted 

 by weathering, but normally smooth or very faintly, locally, obso- 

 letely wrinkled ; the individuals vary somewhat in stoutness ; aper- 

 ture com])aratively small, a thin glaze on the body, outer lip sharp 

 and thin ; pillar short, straight, really white, but frequently having 

 a blackish a|)i)carance from dirt being included in the narrow axial 

 perforation which is not quite covered by the reflected j)illar. Dimen- 

 sions of two contrasted individuals in millimeters : 



Collected by Lt. Col. E. A. Mearns on the Kapiti plains. Uganda 

 Railway, British East Africa. U. S. N. Mus. No. 214,301. 



A large number of this species was collected, and the jicculiar 

 whiteness of the shell, even when not bleached by the sun, is un- 

 usual in the group, and hardly obscm-ed by the delicate perios- 

 tracum. 



Tn general outline the species is not unlike L. conncctens Martens, 

 of German East Africa, which has, however, a more or less grann- 

 lose sculpture. 



