HEMISINUS. 



Plate IV. 



Species 15. (Fig. a, b, Mus. Cuming.) 



Hemisinus pulcher. Hem. testa globoso-turbinatd, 



uslulato-olivaced, subpellucidd, rdgro oblique strigatd, 

 anfractibus paucis, undique couferlirn spirt/liter liratis, 

 superne marginatis, sutiiris anguste canaliculars, an- 

 fractii ultimo ventricoso ; aperturd late ocatd, colu- 

 mella late calloso-contortd. 



The beautiful Hemisinus. Shell globosely turbina- 

 ted, brownish-olive, somewhat transparent, obliquely 

 streaked with black, whorls few, closely spirally 

 ridged throughout, margin at the upper part with 

 the sutures narrowly channelled, last whorl ventri- 

 cose ; aperture broadly ovate, columella broadly cal- 

 lously twisted. 



Rob. Pernambuco. 



A bright-coloured, swarthy, yellowish-olive shell, ob- 

 liquely streaked with black, but chiefly characterized by its 

 elegant, shortly turbinated convolution, and close spirally 

 ridged sculpture. 



Fig. 16. (Fig. 16 a, b, Mus. Cuming.) 



Hemisinus crenocakina. Hem. testa globoso-conoided, 

 solidd, nigrescente-castaned, anfractibus quinque, longi- 

 tudinaliter plicato-undatis, ultimo ventricoao-fotflato, 

 superne late angulatis, undique spiraliter liratis, lira 

 ad angulum creuo-cariuatd ; aperturd subquadrato- 

 oblongd, ampld, fauce fused, columella calloso-con- 

 tortd. 



The crenated-keel Hemisinus. Shell globosely co- 

 noid, solid, blackish-chestnut, whorls five, longitudi- 

 nally plicately waved, the last veutricosely inflated, 

 broadly angled at the upper part, spirally ridged 

 throughout, ridge on the angle crenately keeled; aper- 

 ture somewhat squarely oblong, large, fuscous in the 

 interior, columella callously twisted. 



Melanopsis creno-cariua, Moricand, Mem. Soc. d'Hist. Nat. 

 Geneve, vol. ix. p. 61. 

 Melania cingulata, Jonas. 

 Melania creno-carina, Philippi. 



Hob. Brazil. 



This very striking globosely turbinated species differs 

 remarkably in general aspect from any other species of the 

 genus. 



Species 17. (Fig. a, b, Mus. Cuming.) 



Hemisinus obesus. Hem. testa ovato-turbinatd, obesd, 

 solidd, uslulato-brunned, immaculatd, anfractibus pau- 

 cis, rotundatis, obsolete spiraliter liratis, suturis cana- 

 Uculatis ; aperturd oblongo-ovatd, columella calloso- 

 contortd. 



The stout Hemisinus. Shell ovately turbinated, stout, 

 solid, burnt brown, unspotted, whorls few, rounded 

 obsoletely spirally ridged, sutures channelled ; aper- 

 ture oblong-ovate, columella callously twisted. 



Uab. Brazil. 



A shell of stout solid growth covered with a rich swarthy 

 epidermis, only very obsoletely ridged, and devoid of any 

 marking. 



Species 18. (Fig. 15, c, d, Mus. Cuming.) 



Hemisinus zebra. Hem. testa subgloboso-ovatd, solidius- 

 culd, obesd, ustulalo-luted, casianeo-nigro conspicue 

 longitudinaliter strigatd, anfractibus paucis, lievigatis, 

 superne obtuse angulatis, deinde plano-convexis, ultimo 

 ad basin sulcata; aperturd oblongo-ovatd, labro superne 

 sinuato, columella calloso-contortd. 



The zebra Hemisinus. Shell subglobosely ovate, rather 

 solid, stout, swarthy yellow, conspicuously longitudi- 

 nally striped with chestnut-black, whorls few, smooth, 

 obtusely angled round the upper part, then flatly 

 convex, last whorl grooved at the base ; aperture 

 oblong-ovate, lip siuuated at the upper part, columella 

 callously twisted. 



Hab. Brazil. 



The species here described is the very characteristic 

 zebra-striped shell represented at Fig. 15 c, d, which it 

 will be seen is quite distinct from that at Fig. 15 a, b. 

 The shell represented at Fig. 18 a, b, proves not to be a 

 Hemisinus, but a specimen of Melania sip/tonata described 

 at Plate XX. Fig. 143. 



January, 1860. 



