PROCEEDINGS OF THE ACADEMY OF [Feb., 



NEW MARINE MOLLUSKS. 

 BY EDWARD G. VANATTA. 



The species herein described were encountered in determining 

 material for the collection of the Academy of Natural Sciences of 

 Philadelphia. 

 Haminea zanzibarica n. sp. PI. V, fig. 12. 



Shell large, subglobose, thin, shining, translucent, pinkish 

 white, slightly orange-tinted at the vertex and the base. The sur- 

 face is covered with very close microscopic wavy spiral striae, 

 longitudinally irregularly coarsely wrinkled, sometimes with several 

 angular spiral ridges caused by spiral malleation. Vertex im- 

 pressed, imperforate, whitened by an internal thickening of the 

 shell. The aperture is narrow above, ample below. The right lip 

 rises from the left side of the apical depression. Parietal callus 

 very thin. The columellar lip is evenly concave, broadly reflexed, 

 and the edge is not adnate except at the upper end, forming a 

 crescent-shaped free plate over the axial region. 



Alt. 20, diam. 14 mm. 



Alt. 21, diam. 15.5 mm. 



Locality. Zanzibar. 



The type is in the collection of the Academy of Natural Sciences 

 of Philadelphia, No. 57,552. 



This species may easily be distinguished from H. zelandice Gray 

 by its less globular form, less convex parietal wall and the micro- 

 scopic waved spiral stride and free edge of the columellar callus. 

 This species is larger than H. natalensis Krauss, and the right lip 

 does not rise so high above the vertex. The spiral malleation is 

 similar to that of Limncea palustris. 

 Haminea sucoinea var. solidior n. PI. V, fig. 8. 



Shell solid, imperforate, finely wave striate, color waxen white. 



This variety may be easily distinguished from the typical H. 

 succinea Conr. by being heavier and smaller. 



Alt. 7, diam. 3 mm. 



