PLEUROTOMA. 



Plate XXXIV. 



Species 306, (Mus. Taylor.) 

 (Magnified to twice its natural length.) 



Pleurotoma viridula. Pleur. testa ovatd, subventricosd, 

 tenui, semipellucidd, lavigatd, aut traiisversim ntinu- 

 tissime iinpresso-striatd ; alba, nitidd, 



The greenish Pleurotoma. Shell ovate, somewhat 

 ventricose, thin, semi-transparent, smooth or trans- 

 versely very minutely impressly striated ; white, 

 shining. 

 Defrancia viridula, Moller. 



Hah. Greenland. 



A smooth semi-transparent greenish white shell. 



Species 307. (Mus. Hankey.) 

 (Natural size.) 



Pleurotoma sinuosa. Pleur. testa pi/ramidali-ovatd, 

 solidd, bast truncatd, avfractibus superne coiicavis, in- 

 fra fortiter tuberculato-costatis, costis oblique sinuosis, 

 traiisversim fortissime crebrislriatis ; dorso gibboso ; 

 shut amplo, rotundato ; alba, fascia uuicd fuscesceute 

 indislinctd. 



The sinuous Pleurotoma. Shell pyramidally ovate, 

 solid, truncated at the base, whorls concave round the 

 upper part, tubercularly ribbed beneath, ribs obliquely 

 sinuous, transversely very strongly closely striated ; 

 back gibbous, sinus large, rounded ; white, encircled 

 with an indistinct brown band. 



Gray, MSS. (private cabinet). 



Eab. ? 



A solid white shell, very faintly banded, remarkably 

 strongly ribbed and striated. 



Species 308. (Mus. Belcher.) 



Pleurotoma amabilis. Pleur. lestd ovatd, turritd, pal- 

 lida auranliacd ; anfractibus septenis, subrotundis, cos- 

 tulatis, traiisversim striatis ; coslulis rotundatis, sub- 

 dhtaiitibus ; suturd maculis albis ornatd ; anfractu 

 ■ultimo fascia alba angustd ciucto. 



The lovely Pleurotoma. Shell ovate, turreted, pale 

 orange; whorls seven in number, somewhat round, 

 ribbed, transversely striated ; ribs rounded, rather 



distant ; suture ornamented with white spots ; last 

 whorl encircled with a narrow white band. 



Clavatula amabilis, Hinds, Moll.Voy. Sulph., p. 21. pi. 7. f-3. 



Hab. Straits of Malacca (from seventeen fathoms mud) ; 

 Hinds. 



A pretty Scalaria-]ikc species. 



Species 309. (Mus. Gray.) 

 (Magnified to twice its natural length.) 



Pleurotoma affinis. Pleur. testa pyramidali-oblongd, 

 anfractibus superne coiicavis, leiinissime striatis, infra 

 longitudinaUter costatis, traiisversim liratis, aperturd 

 parviusculd, lutescente. 



The allied Pleurotoma. Shell pyramidally oblong, 

 whorls hollow round the upper part, very finely stria- 

 ted, longitudinally ribbed and transversely ridged 

 beneath, aperture rather small, yellowish. 



Gray, MSS. (private cabinet.) 



Hab. Island of St. Vincent, West Indies ; Guilding. 



Of a peculiar yellow tinge. 



Species 310. (Mus. Cuming.) 



Pleurotoma delicata. Pleur. testa svhulatd, tenui, ////- 

 alind, traiisversim minute et creberrhne elevato-striatd, 

 aperturd brevi ; pellucido-albd, auranlio pallidissimi 

 maculatd. 



The delicate Pleurotoma. Shell subulate, thin, hya- 

 line, transversely minutely and very closely elevatelj 

 striated, aperture short ; transparent white, very palely 

 spotted with orange. 



Eab. Lord Hood's Island, Pacific Ocean ; Cuming. 



An elongated transparent bulimoid shell. 



Species 311. (Mus. Cuming.) 



Pleurotoma axis. Pleur. testa recto-acuminatd, mferne 

 contract,!, anfractibus superne biearinatis, infra trans- 

 oersim exiliter lira/is. aperturd oblongd, sinn profun- 

 da, albidd, auraiitio-fusco subindisUncte liuctd. 



The axle Pleurotoma. Shell straight ly acuminated, 

 contracted at the upper part, whorls two-keeled round 



January 1846. 



