LEIOSTEACA.— Plate I. 



Species 5. (Fig. a, h, Mus. Cuming.) 

 Leiostraca Metcalfei. Lei. testa siibfiisi/ormi, com- 

 pressd, suhpellucidd, alba, cinguld nifd interruptd et 

 lincis undulatis obliquiter lotiffitndiualibus ornald ; 

 anfractibus 2)erpaucis, ultimo magno, ovali ,■ apertiird 

 nubtrigond, infra lata. 

 Metcalfe's Leiostiiaca. Sliell subfusiform, com- 

 pressed, subpelluciil, white, ornamented with <in in- 

 terrupted red band and undulating obliquely longi- 

 tudinal lines ; whorls very few, the last large, oval ; 

 apertm'e subtrigonal, wide beneath. 

 A. Adams, Sowerby's Thesaurus, Leiostraca, sp. 1. pi. 

 170, f. 13, 13. 



Hab. ? 



This pretty little shell is very difterent in form from all 

 the other species, and exhibits, in a strong degree, the 

 peculiar compressed character of the body-whorl in front. 



Species 6. (Fig. a, b, Mus. Cuming.) 



Leiostraca bivittata. Lei. testa elongatd, attenuatn, 

 pallida, fasciis liiiearib/is, spiralibiis duabus in medio 

 aiifractuitm. cinctd ; anfractibus rectis, moderate ob- 

 luiigis; apertiird august a, pyrifond. 



The double-banded Leiostraca. Shell elongate, at- 

 tenuate, pale, girt with two linear spiral bands in the 

 middle of tlie whorls; whorls straight, moderately 

 oblong ; aperture narrow, pyriform. 



H. and A. Adams, Genera of Recent MoUusca. 

 Eulima biUneata, Adams and Reeve. 



Hab. ? 



It is difficult to distinguish this species from Lei. va- 

 rians. The two thin bands in the centre of the whorls 

 give it a different aspect, and it is narrower, with shorter 

 whorls. Tiie aperture is somewhat less spread at the 

 lower part. 



