TRICHOTROPIS.— Plate II. 



Species 10. (Mus. Erit.) 



Teichotropis CLATiinATA. Tri. testa fusiformi, epkler- 

 mide tenui, pallida indutd, coslis, spiralihus suh- 

 moniliformibus, et costellis interstitialibus regulaiihus 

 concentricis cancellatd ; spird acuminata, anfrac- 

 tihus superne angulatis, carinatis ; apertiird sub- 

 trigond, antice acuminata ; umbilico angusto. 



The latticed Teichotropis. Shell fusiform, covered 

 with a thin, pale epidermis, cancellated with 

 slightly beaded spiral ribs, and interstitial regidar 

 small concentric ribs; spire acuminated, whorls 

 angular, carinated above ; aperture subtrigonal, 

 anteriorly acuminated ; umbilicus narrow. 



A. Adams, MS. 



Hob. New Zealand. 



Species 11. (Mus. Brit.) 

 Trichotropis inermis. Tri. testd subfusiformi, epider- 

 mide stramineo indutd, costis spiralibus submonili- 

 formibus, rotimdis, crassiilsculis crebris et interstitiis 

 angustis striatis sculptd ; anfractibus angulatis, 

 supra suturam bicostatis ; umbilico mediocri; apier- 

 turd stibovatd, antice acuminata. 



The unarmed Trichotropis. Shell somewhat fusiform, 

 covered with a straw-coloured epidermis, sculp- 

 tured with slightly beaded, rounded, rather thick, 

 close, spiral ribs, and narrow, striated interstices ; 

 whorls angular, two-ribbed above the suture ; 

 umbilicus middle-sized; aperture rather ovate, 

 anteriorly acuminated. 



HmDS. Voyage of the Sulphur, voLiL, figs. 13, 14. 



Hab. N.W. America. 



The spiral ribs in this species are rounded and near 

 together. 



Species 12. (Mus. Brit.) 



Trichotropis conica. Tri. testa pyramidatd, stramined, 

 vix umbilicatd ; spird conicd, elevatd ; anfractibus 

 tricarinatis, lateribiis declivibus ; columelld angusld, 

 torlud ; aperturd subquadratd ; antice planatd. 



The conical Trichotropis. Shell pyramidal, straw- 

 coloured, scarcely umbilicated ; spire conical, 

 elevated ; whorls three-keeled with sloped sides ; 

 columella narrow, tortuous ; aperture rather 

 square, flattened anteriorly. 



MiJLLER. 



Hab. GreenLand. 



Species 13. (Mus. Brit.) 



Trichotropis costellata. Tii. testd fusifoi~mi, subtur- 

 binatd, tenui, costellis tribus supericrihus majoribus, 

 tribus quatuor inferioribus hirsutis, cinctd, anguste 

 umbilicatd ; aperturd subtrigond, antice acwninatd. 



The SMALL-RIBBED Trichotropis. Shell fusiform, sub- 

 turbinate, thin, encircled with three upper, larger, 

 and four lower, smaller, hairy ribs ; narrowly 

 umbilicated ; aperture subtrigonal, anteriorly 

 acuminated. 



Couthoy. Boston Journal, 



Hab. N. America. 



In Trichotropis Borealis the ribs are thick and equal. 

 In this species, otherwise much resembling it, the three 

 upper ribs are thin, and the four lower ones still thinner. 

 The entire shell is also thinner, and the umbilicus 

 narrow. 



*168I«* 



