HEMISINUS.— Plate I. 



The bulging out of the last whorl of this species gives 

 it a Succinwm-\ike outline, while the columella is more 

 callous and twisted than usual. It is interruptedly fil- 

 leted throughout with unevenly faint reddish lines. 



Species 4. (Fig. a, Mus. V. d. Busch. Fig. b, Mus. 

 Cuming.) 



Hemisinus lineolatiis. Hem. testa subulato-lurbinatd, 

 solidiusculd, luteo-oUvaced, cinereo-cceruleo latifas- 

 ciald, lineis rv.fipuncta.tw undique cingulata, anfracti- 

 bus octo, plano-convexis, ultimo gibboso-rotuudato ; 

 aperturd ovatd,fance rufo-castaned, columella calloso- 

 arcuatd. 



The finely-lineated Hemisinus. Shell subulately tur- 

 binated, rather solid, yellowish-olive, broadly banded 

 with ash-blue, and encircled throughout with red- 

 dotted lines, whorls eight, flatly convex, the last gib- 

 bously rounded ; aperture ovate, reddish-chestnut 

 within, columella callously arched. 



Melania lineolata, Gray, Griffith's Cuvier's Anim. King, 

 pi. 13. f. 4. 



Hub. Venezuela. 



Closely typically allied to the preceding species, though 

 of very different specific character. It has the same en- 

 circling painting of red-dotted lines. 



Species 5. (Pig. a, b, Mus. Cuming.) 



Hemisinds Brasiliensis. Hem. testa turriculatd, soli- 

 diusculd, olivaced, fasciis tribus caslaneis punctisque 

 rufis linearibus transversis cingulata, anfractibus octo, 

 undique confertim spiraliter lineari-sulcatis ; aperturd 

 subanguste ovatd, columella rigide arcuatd. 



The Brazilian Hemisinus. Shell turriculated, rather 

 solid, olive, encircled with three chestnut bands, and 

 with transverse, linear, red dots, whorls eight, closely 

 spirally linearly grooved throughout; aperture rather 

 narrowly ovate, columella rigidly arched. 



Afelanopsis Brasiliensis, Moricand, Mem. Soc. Hist. Nat. 

 de Geneve, vol. vii. p. 38. pi. 3. f. 12, 13. 



Hab. Brazil. 



Rather solid and erect, grooved and banded throughout, 

 and freely encircled with the transverse red dots which 

 are typical of most of the species of the locality. 



