H EMIS INUS. 



Plate III. 



Species 9. (Mils. Cuming.) 



Hemisinus dermestoidea. Hem. testa oblongo-cylin- 

 dracea, laevigata, tenebroso-castaned, ad sit! urns luteold 

 anfractibus sex, plano-convesds : aperturd ovatd, colu- 

 mella arcuato-contortd. 



The Dermestes-like Hemisinus. Shell oblong cylin- 

 drical, smooth, dark-chestnut, yellowish at the su- 

 tures, whorls six, flatly convex; aperture ovate, co- 

 lumella arcuately twisted. 



Melauia dermestoidea, Lea, Pro. Zool. Soc. 1850, p. 181. 



Hab, Seychelle Islands. 



Mr. Lea observes of this little cylindrical species, " the 

 most marked character is the notched channel of the base." 

 It is this which gives it a claim to a place in the genus 

 Hemisinus. 



Species 10. (Fig. a, b, Mus. Cuming.) 



Hemisinus aspersus. Hem. testa ovatd, subventricosd, 

 semipellucido-o! ivaced, castaneo trifasciatd, punctis 

 rufis linearibus undique teeiiiald, anfractibus quinque, 

 obsolete sulco-striatis, ultimo subinfiato ; aperturd 

 ovatd, vix canalieulatd. 



The sprinkled Hemisinus. Shell ovate, slightly ven- 

 tricose, semi-transparent, olive, encircled with three 

 chestnut bands, filleted throughout with linear red 

 dots, whorls five, obsoletely groove-striated, the last 

 somewhat inflated ; aperture ovate, scarcely chan- 

 nelled. 



Hob. Brazil. 



This little species possesses the generic basal channelling 

 of Hemisinus, but only in a very slight degree. 



Species 11. (Pig. a, Mus. Cuming, 

 Fig. b, Mus. V. d. Busch.) 



Hemisinus strigilatus. Hem. testa elongato-turritd, 



teuebroso-oli raced, anfractibus onto ad decern, declivi- 

 planatis, lavibus, obscure crispato-striatis, ultimo 

 convexo ; aperturd lunari-ocald, ad basin truueatd, 

 columella tenue contortd. 

 The channelled Hemisinus. Shell elongately tur- 

 reted, dark-olive, whorls eight to ten, slopingly flat- 

 tened, smooth, obscurely crisp-striated, last whorl 



convex ; aperture lunar-ovate, truncated at the base, 



columella thinly twisted. 

 Melania strigilata, Huuker, Philippi, Abbild. und Besch. 



Conch, pi. 2. f. 14. 

 Hab. Brazil. 



The aperture is more than usually truncated at the 

 base, and the columella is peculiar in not showing any 

 callous contortion except at the basal extremity. 



Species 12. (Fig. a, b, Mus. Cuming.) 



Hemisinus olivaceus. Hem. testa ovato-turriculatd, 

 subobtusd, so/idd, luteo-olivaced, fasciis duabus latin 

 tenebroso-castaneis cingulatd, anfractibus panels, sub- 

 planulatis, undiqui rude tuberculato-granatis ; aper- 

 turd anguste ocatd, columella tenue contortd. 



The olive Hemisinus. Shell ovately turriculaled, ra- 

 ther obtuse, solid, yellowish-olive, encircled with two 

 broad dark-chestnut bands, whorls few, somewhat 

 flattened, rudely tubercularly grained throughout ; 

 aperture narrowly ovate, columella thinly twisted. 



Behn, MS. in Mus. Cuming. 



Hab. Pernambuco. 



The only species of the genus which has so rough an 

 armature of tubercular grains. 



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



Hemisinus ruginosa. Hem. testa turriculatd, cinereo- 

 olivaced, semipellucidd, liris purpureo-fuscis opacis 

 undique cingulatd, anfractibus septem ad octo, con- 

 vexis ; aperturd ovatd, columella tenue rejlexd. 



The wrinkled Hemisinus. Shell turriculated, ash- 

 olive, semi-transparent, encircled* throughout with 

 opaque purple-brown ridges, whorls seven to eight, 

 convex ; aperture ovate, columella thinly reflected. 



Behn, MS. in Mus. Cumingv 



Hab. Brazil. 



In this species the transverse red colouring is not in 

 dots, but in decided ridges, giving the shell an appearance 

 of being encircled with rings. 



Species 14. (Mus. V. d. Busch.) 

 Hemisinus Esperi. Hem. testa ovato-conicd, fuscescenle, 



January, 18G0. 



