HELICIXA.— Plate III. 



Helicina (2nd) PL III. f. 109, 110. 

 Hah. Cuba. 



Shl'ttleworth. Sowerby's Thpsaunis Conchyliorura. j The very large Helicin.\. Shell broad, siibcom- 



pressed, smooth, white ; spire a little elevated, 

 last -whorl compressed, rounded; ventral callus 

 expanded, columella short; aperture semilunar, 

 outer lip expanded, reflected. 



SowERBV. Proc.Zool. Soc. 1842. Thes. Conch., pi. i. f. 2. 



Hah. Jamaica. 



A very pretty 

 group. 



iple of the 



Species 20. (Mus. • 



•?) 



Helicina sinuosa. Hel. testd solidd, alba, subtrochi/onni, 

 superne conicd, in/erne rotundato-siihconve.rd, spi- 

 raliter striata, medio avfractuum siibcarinatd ; 

 aperturd snbauriformi, labio externa rotunda, su- 

 perne sinuatim depresso, prope j^incturam anticmn 

 sinuato ; labio interna antice in columellam tortuam, 

 postice in plicam callosam terminanti. 



The sinuous Helicina. Shell solid, white, somewliat 

 trochiform, conical above, rounded and a little 

 compressed beneath, spirally striated, slightly 

 keeled in the middle of the whorls, aperture 

 somewhat auriform, outer lip round, sinuously 

 depressed above, sinuated near the anterior junc- 

 tion, inner lip terminating anteriorly in a tortuous 

 columella, posteriorly in a callous fold. 



Pfeiffer. Zeitsch. fur Malak. 1830. 



Hab. Mexico. 



The aperture of this species is most curiously 

 formed, a sinuous depression in the upper part of the 

 outer lip and a callous semicircular plait on the inner 

 lip near the junction, forming together a kind of loop. 



Species 21. (Mus. Brit.) 



Helicina maxima. Hel. testd laid, suhcompressd, Icevi 

 gatd, alba ; spird paulo elevatd, anfractu ultimo 

 compresso-rotundaia, callo ventrali expanso, colu- 

 mella hrevi ; apei-turd semilunari, labio extcrno 

 expanso, rejlexo. 



Species 22. (Fig. a, h, Mus. Brit.) 



Helicina excavata. Hel. testd trochiformi, fulvd, spi- 

 raliter striata ; spird moderate elevatd, acuminata ; 

 apice mua-onata ; ultimo anfractu rotundato-suh- 

 depresso ; aperturd subrotundd. intils aured; labia 

 externa tenui, planulato, rejlexa, calumelld subtri- 

 gond, excavata. 



The exc.wated Helicina. Shell trochiform. fulvous, 

 spirally striated ; spire moderately elevated, acu- 

 minated ; apex mucronated ; last whorl rounded, 

 subdepressed ; aperture rather rounded, golden 

 within ; outer lip thin, flattened, reflected ; colu- 

 mella subtrigonal, excavated. 



Pfeiffer. Proc. ZooL Soc. 183.J. 



Hab. ? 



Species 23. (Fig. a, h, Mus. Brit.) 



Helicina Adamsiana. Hel. testd jjarvd, rubescenti, len- 

 tiailar-i, loevigatd ; spird convexa-depressd, oblique 

 leviter striata, labio externa alba superne depresso, 

 iufrd prope juncturam tumidiuscido, suJiflexuoso, 

 calumelld brevissimd, arcuatd. 



The Adamsian Helicina. Shell small, reddi.sh, len- 

 ticular, smooth, spire convexly depressed, obliquely 

 .slightly striated, outer lip white, depressed above, 

 rather swelled below near the junction, sub- 

 flexuous, columella very short, curved. 



Pfeiffer. Proc. Zool. Soc. 1842. Soweiby's The- 

 saurus, fig. 71, 72. 



Hab. Jamaica. 



