440 



Couihouy^s Description of a new species 



•ART. XXL— DESCRIPTION OF A NEW SPECIES OF THE 

 GENUS MARGINELLA (LAM.), WITH SOME OBSERVA- 

 TIONS UPON THE SAME. By Joseph P. Couthouy. Read 

 Oct. 5. 1836. 



In examining a box of shells recently received from the 

 Spanish Main, I was struck by the singular aspect of two 

 shells of the genus Marginella which were among them ; 

 and subsequently, a careful examination of such as have 

 been already described, has resulted in the conviction that 

 they belong to a new species. I have described it as 

 follows : 



Marginella Storerta. 



Pate IX, Fig. 1.2. 



M. testa parvd, ovat^, nitida, cineracei vel cinereo-albescenle, 

 sffipe faaciis duabas obscuris cmct4,spiri obtus^, lievis; labro crasso, 

 albidissimo, intus castaneo, laevique ; margine supra aureo-fusces- 

 cente fimbriate. Columella, plicis quatuor latis instruct^, super 

 ventrem valde extensig. 



Shell 



^ ^ ,, , — ^y — , ^^ — ^ 



color, back sometimes crossed by two indistinct bands, 

 the successive growth of the shell indicated by white lon- 

 gitudinal lines. Spire slightly prominent, smooth, under 



• l 11^* _ !•- "I 



very 



^ j^ — ■ - ./ 



strongly developed, its upper edge marked with a dark or- 



an ere 



umella furnished with four strong plaits or folds, which ex- 

 tend much farther than usual upon the belly of the shell, 

 and form its chief distinction. The two upper are nearly 

 transverse, the two lower very obhque, and a slight in- 



groove 



