80 



Ranella caudata. — Shell pale reddish-brown, cancellate, with 

 eleven robust costa to the body whirl, and several revolving filiform 

 lines passing over them, which are more prominent upon the varice 

 of the aperture, terminate at its inner edge, and there alternate 

 with the raised lines of the fauces ; volutions flattened at their 

 summits, abruptly declining to the suture ; canal coarctate, rather 

 longer than the spire ; beak rectilinear, reflected at the tip. 



Length one inch. Inhabits the coast of the United States. 

 Cabinet of the Academy and Philadelphia Museum. A rather 

 common species. 



This generic name I think objectionable, inasmuch as it borders 

 too closely upon Renilla, which designates a genus of the class 

 Polypi of Lamarck. Montfort's appellation Buffo is not preferable 

 for a similar reason, as it would be liable to be confounded with 

 Buffo, a genus of Reptilia. 



FuLGUR PYRULOIDES. — Shell with spiral strise alternately larger; 

 whirls white, transversely lineated with ferruginous lines, inter- 

 rupted or obsolete on the middle ; above flattened, unarmed ; spirt 

 short ; suture profoundly canaliculate. 



Seha, Vol S,pl QS,ffg. 19, 20 ? 



Lister, Conch.pl. 877 ? 



Length three inches and four-fifths. Breadth one inch and 

 one-tenth. Inhabits the Southern coast. Cabinet of the Academy 

 and Philadelphia Museum. 



At first sight this species would be referred to the genus PyrtUa, 

 but upon inspection it will be observed to have a fold on the colu- 

 mella. I formerly mistook the young shells for those of F. canicu- 

 lata or gramim, which they much resemble in form, in the grooved 

 sutures, and in the spiral striae ; but they difi"er from them in 

 having a much less elevated spire, by being entirely destitute of 

 armature, either of spines or tubercles, upon the angulated ridge 

 of the volutions, and by being marked with colored lines. In this 

 last character they approach F. perversus, but they will not be mis- 

 taken for that species. 



As the shell advances in growth, the acute edge of the depressed 

 top of the whirls becomes obtuse, and in the adult shell it is 

 nearly obsolete ; in which state the almost regular curve of the 

 whirl is very like that of Pyrula. 



Seba's figures above quoted, are probably intended for this 



