some of the Land Shells of Ciiha. 491 



Shell very slender and delicate, fusiform, translucent, some- 

 what enlarged at tip ; surface faintly tessellated with subquad- 

 rate spots of opaque white : whorls about twenty-four, about 

 eight of which are usually broken from the summit ; the 

 others are very slightly convex, smooth ; the last whorl is dis- 

 joined from the penultimate, and stretched out so as to take 

 nearh the direction of the axis of the shell, and to brins: the 

 plane of the aperture nearly at right angles with it ; this last 

 whorl is also covered with minute, close-set ribs ; aperture 

 circular, with the peristome broadly and roundly everted. 

 Length, } inch ; breadth, tJ^t inch. 



This is the most interesting of the group to which it belongs. 

 There is probably no land shell so slender, and made up of so 

 many whorls. In fresh specimens it is beautifully flecked 

 with spots of opaque white. It is most nearly allied to Cy- 

 lind. crispula, Pfeiffer. Found at the Retiro, at the edge of 

 woods, on a limestone knob, under a shelving rock. 



Pupa (Siphonostoma) lactaria, Gould. Plate xxiv. fig. 13. 



Testa fusiformi, apice truncatd, tenui, albida, sursum fuscescente, rivulis 

 lacteis longitudinaliter undique notata : anfr. superstitibus 10, convexiusculis, 

 concinne striatis ; ultimo carinato ; apertura circular!, amplo, expanse j 

 peristomate albo, modice everso : collo brevi. 



Shell fusiform, truncated at tip, thin and translucent, yel- 

 lowish white, becoming dusky towards apex, and variegated 

 with flexuous, milk-white, longitudinal lines. Remaining 

 whorls about ten, slightly convex, elegantly sculptured by 

 delicate, oblique, longitudinal striae, of a uniform size on all 

 the whorls ; the last whorl has a distinct keel skirting the re- 

 gion of the umbilicus. 



Separation of the last whorl short, forming a large, rounded, 

 trumpet-shaped aperture, turning outwards to form a narrow, 

 white lip. The aperture stands at an angle of 45° with the 

 axis of the shell. Length, f inch ; breadth, 5^7 inch. 



In shape this species resembles C. clegans, Pf. ; though more 

 nearly like Clausilia siibida 1 Ferus. in size and sculpture, but 

 it is more ventricose, has fewer whorls, a shorter neck, larger 

 aperture, and less broadly reflected lip. 



