392 BULLETIN OF THE 



Lippistes amabilis n. s. 



Plate XXXII. Figs. 9, 13 



Shell small, yellowish white, planorboid, of about four whorls, including a 

 minute smooth nucleus. Whorls rounded, barely touching, not constantly 

 contiguous but normally enrolled. Spiral sculpture of on the upper side six, 

 on the periphery four, and on the base six rounded threads, the peripheral ones 

 rather larger than the others, all with narrower interspaces; radiating sculpture 

 comprising, first, fine elevated lamellae covering the whole shell evenly and 

 giving it a slightly spongy aspect; secondly, on the last whorl, about ten ele- 

 vations, not perceptibly continuous over the top of the shell but prominent, 

 over the periphery and reflected backward like incomplete varices. The outer 

 whorl is coiled over these so that the whorl inside only touches the outer one 

 by these prominences. They are not continuous over the base, but within the 

 ample umbilicus are two rows of small prominences corresponding in number 

 to those on the periphery. Aperture circular, with a complete circular varix 

 which is radiately crenulated. The apex is sunk below the top of the last 

 whorl. Max. diain., 5.0; min. diam., 3.0; alt. (or diameter of terminal varix), 

 2.0 mm. 



Habitat. Off Havana, in 80 fms., Sigsbee. 



This most lovely and very remarkable little shell is like nothing else which 

 has been described as far as I know, and is so distinct as to need no com- 

 parisons. 



Family CYCLOSTREMATID^. 



Genus VITRINELLA C. B. Adams. 



Vitrinella Holmesii Dall. 



Cuchliulepis parasiticus Holmes, Post Pliocene Foss. S. Car., p. 93, pi. xiv, figs. 9, 9 a, b, 

 1860. Not of Stimpson, 1858. 



I have already called attention to this species. 



Vitrinella (EpiscyniaV) multicarinata n. s. 

 Vitrinella multicarinata Stimpson, MS., in U. S. Nat. Mus. 



Shell small, depressed, translucent whitish, polished, four or five whorled, 

 carinated. Radiating sculpture of flexuous incremental lines, faint above, more 

 strongly marked on the base; a sharp peripheral thread or carina (below 

 which tbe suture is applied) is microscopically serrate by the lines of growth; 

 above and below this are two or more carinas, faint angulations of the surface, 

 conspicuous in the fresh shell as the epidermis is produced into a fringe upon 

 them, though not on the peripheral thread. Whorls moderately rounded 



