162 AURICULACEA. 



conic, terminating in an acute transparent point ; suture 

 simple ; whorls 10, the upper ones flattened and narrow, 

 the last one tapering towards the base, and equalling about 

 the length of the shell; aperture hardly oblique, very 

 narrow, divided at its base by a stout, sharp, columellar 

 fold, which ascends and winds obliquely into the aperture ; 

 peristome simple, acute, armed within with from 6 to 8 

 elongated laminae, not quite reaching the edge of the lip, 

 the lower one being most fully developed. 



Length of the specimen before me, 11 ; breadth, 5 ; 

 length of aperture, 6 millimetres. 



Geographical Distribution. The only American speci- 

 men of this species I have seen, was collected in Florida 

 by Mr. Bartlett. The species is also found in Cuba, Ja- 

 maica, and Porto Rico. 



Remarks. This is one of the species common to the 

 peninsula of Florida and some of the West Indian 

 Islands. It is well known that very many marine shells 

 are also common to the same localities, so that it is easier 

 to account for its presence than that of some strictly ter- 

 restrial species. 



The shell cannot readily be confounded with any other 

 known American species. It is readily distinguished by 

 its elongated form, and peculiar enamel-like surface, which 

 reminds one of the highly polished Olivce. 



The figure referred to is copied from Orbigny's Mollusca 

 of De la Sagra's Cuba. 



MELAMPUS COFFEA LINN^US. 



PLATE LXXV. FIGURES 21, 25. 



Testa imperforata, coniea, solidissima, laevigata, nitens, lineis volventi- 

 bus microscopicis, et rugis laevigatis increment! notata ; sub epiderme 

 grisea, livida, fasciis 3-4 albis, una ad carinam obtusam lata, alteris an- 

 gustioribus, cineta ; sutura mediocris, spira brevis, coniea, apice nigra, 

 acuta, nitente; anfr. 9-10, super! planiusculi, ultimus obtuse-subcarinatus, 

 -1.7. long, testa? asquans ; apertura subverticalis, longa, angusta, infra la- 



