LEIOSTRACA. 



Plate III. 



Species 13. (Fig. a, h, Mus. Cuming.) 



Leiostr.4c.\ VYKAMiDALis. Lei. tesld breviusculd, pyfa- 

 midali, subpeUucidd, albidu, in medio anfractuum pal- 

 lide fuscn-purpiirasceide ; anfractibm sepiem, curtis, 

 rectis, idtiiiio siihitiigidato ; aperlnrd ovali. 



The pyramidal Leiostuaca. Sbell rather sliort, py- 

 ramidal, subpellucid, wiiitisli, pale purplish-brown in 

 the uiidtlle of the whorls; whorls seven, short, straight, 

 the last slightly angular; aperture oval. 



SOWERBY. 



Hab. ? 



This species rather resembles Lciostraca acicidala, but 

 is shorter and more angular. 



Species 14. (Mus. Cuming.) 



Leiostraca stenostoma. Lei. iedd leiwi, semlpellitcidd, 

 subfusifonii ; anfractibm vix inflalis, tiUimo obloiigo, 

 in medio sabangulato ; apertura anguslatd, colmnelld 

 elongald, lahru snbaiigidato. 



The narrow-mouthed Leiostraca. Shell thin, white, 

 semipelkicid, subfusiform ; whorls extremely little in- 

 flated, the last oblong, subangukitcd in the middle ; 

 apei'ture narrow, columella long, outer lip angular. 



Jeffreys. 



llab. Norway. 



Species 15. (Mus. Cuming.) 



Leiostraca distorta. Lei. lestd parvd, albd,peUucidd, 

 curtd, medio unbarcnnid, depressd, apice iiiciirvo ; an- 

 fractibii.i paucis ; iiperturd siiblrigoud, i)ifru inbex- 

 paiisd. 



The distorted Leiostraca. Shell small, white, pel- 

 lucid, short, somewhat arched and depressed in the 

 middle, apex bent forward ; whorls few ; aperture 

 somewhat trigonal, rather expanded at the lower 

 part. 



Pease. 



Hab. Sandwich Islands. 



The depression of the centre of the body .whorl, which 



is characteristic of several species of this genus, is in this 

 case exaggerated, and extends to one or two whorls above, 

 so that the apex is bent forward, as if some pressure had 

 been placed on the centre of tiie shell wdien in a soft state. 



Species 16. (Mus. Cuming.) 



Leiostraca nivea. Lei. tedd curtd, alba, seiuipellucidd, 

 subpyramidatd ; arifractibns citrlis, pa.nlo iiijlatis, xii- 

 turd diili//c(d ; aperlnrd ovali, columella suhlortud, 

 tenni, labro lennissimo. 



The snowy Leiostraca. Shell short, white, semi- 

 pellucid, subpyramidal ; wdiorls short, a little swelled, 

 suture distinct ; aperture oval, columella subtortuous, 

 thin, outer lip very thin. 



A. iVoAMS. 



Hab. Japan. 



Species 17. (Mus. Cunung.) 



Leiostraca pura. Lei. testa pyramidali, albd,pelhwidd ; 

 anfractibns itnmerosis, curtia, reclii ; aperlnrd angadd, 

 colmnelld snbtortnd. 



The pure Leio.straca. Shell pyramidal, white, pel- 

 lucid; whorls numerous, short, straight; aperture 

 narrow, columella rather tortuous. 



A. Adams. 



Hab. Japan. 



A narrower shell than Leiodraca nivea, with the sides 

 much more straight. 



Species 18. (Mus. Cuming.) 



Leiostraca subventricosa. Lei. testa albd, brevi,sub^ 

 solidd, subovali ; anfractibns paucis, inflalis ; aperlnrd 

 ovali, brevi, labro tenui. 



The subventricose Leiostraca. Shell white, short, 

 rather solid, rather oval ; whorls few, inflated ; aper- 

 ture oval, short, outer lip thiu. 



Sowerby. 



Hab. ? 



May, 1S6G. 



