263 



together with two other new species of North American 



Shells. 



Physa vinosa. Testa tenui, ovato-globosa, badia, 

 spiraliter minutissime striata, epidermide tenui in- 

 duta : spira obtusa, anfr. 4, ultimo per-magno : 

 apertura ovato-lunata, {' longitudinis roquante, he- 

 patica ; columella recta, tenui. Long, f , lat. -j- poll. 

 Brought by Dr. C. T. Jackson from the Lake Superior region. 



A remarkably inflated species, most like P. ancillaria, but is 

 not shouldered, nor widest behind the middle, nor tapering ante- 

 riorly. It is well distinguished by its thin structure, striated sur- 

 face, wine-red color externally, and liver-brown internally. 



Pupa decora. Testa minuta, cylindracea, 

 tenui, nitida, lucida, vinosa, tennuissime striata, 

 perforata ; spira anfr. 5-6 ventricosis, apice ro- 

 tundata ; sutura profunda : apertura circulari, 

 postice truncata, dentibus 4 armata, quorum uno 

 postice, uno ad columellam, duobus ad labrum 

 positis ; perislomate vix reflexo. Long. -^^, 

 lat. 2-V poll- Brought by Mr. T. R. Button from 

 the region of Lake Superior. 



It is rather larger, more cylindrical, and darker colored than 

 P. corticaria. Its aperture is smaller and differently armed. In 

 form, color and armature it is more like P. Goiddii, Binney, 

 which is not more than half its size. 



Natica fossata. Testa depressa, orbiculato-conica, solida, 

 tenuissime striata, cinereo-albida, prope suturam purpurascente 

 subtus pallescente : spira anfr. 5 convexis, decliventibus, ad 

 peripheriam subangulatis : apertura semilunari, fauce hepatico, 

 callo columellari regionem umbilicalem semi-obtegente, castaneo • 

 umbilico magno, profundo, canali profundo, precipiti, epidermide 

 stramineo induto, circumacto. Lat. If, alt. 1^ poll. Hab. Flor- 

 ida Coast. 



This would not at first sight be distinguished from N. duplicata. 

 Say, which it precisely resembles in form and coloring. But the 

 umbilical region is entirely different ; and the deep, wide chan- 

 nel leading to the umbilicus and covered with epidermis is in 

 striking contrast with the pale, polished region adjacent. In this 

 aspect it is like N. Lamarckiana. 



