202 



not shouldered nor widest behind the middle, nor tapering anteriorly. 

 It is well distinguished by its thin structure, striated surface, wine-red 

 color externally, and liver-brown internally. 



Pupa decora. T. minuta, cylindracea, tenuis, nitida, lucida, 

 vinosa, tenuissime striata, perforata; spirS anfr. 5—6 ventricosis, apice 

 rotundata; sutura profunda: apertura circularis, postice truncata, 

 dentibus I armata quorum xuio ad columellam, duobus ad labrum 

 positis ; peristomate vix reflexo. 



Long. £$ ; lat. ,} r , poll. Brought by Mr. T. R. Dutton from the 

 region of Lake Superior. 



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

 corticaria, Say. Its aperture is smaller and differently armed. In 

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

 not more than half its size. 



Natica fossata. T. depressa, orbiculato-conica, solida, tenuis- 

 sime striata, cinereo-albida, prope suturam purpurascens, subtus pal- 

 Lescens ; spira anfr. 5 convexis, decliventibus, ultimo ad peripheriam 

 subangulato : apertura semilunaris; fauce hepatica; callo columellari 

 regionem umbilicalem semi-implente, eastaneo ; uinbilico magno, canali 

 profundo, praecipiti, epidermide stramineo spiraliter striato induto, cir- 

 cumacto. Lat. 1| ; alt. 1| poll. Ilab. Florida. 



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

 Say, which it greatly resembles in form and coloring, but the umbilical 

 region is entirely different ; and the deep wide channel leading to 

 the umbilicus bordered by an acute ridge, and covered by a spirally 

 striated epidermis is in striking contrast with the pale polished region 

 adjacent. In this respect it is like N. Lamarckiana. 



[T7=- Vol. iii. 37, (June, 1848.) 

 Specimens collected by Mr. J. Bartlett. 



SUCCINEA LUTKOLA. T. variabili, ovato-turrita, solidiuscula, laxe 

 striata, extus alba vcl cornea, sed plerumque lutescente, intus lutea ; 

 anfr. I, supernis rotundatis, ultimo conico-ovato ; apertura modica, 

 ovata, partem dimidiam longitudinis vix superante ; columella nor- 

 maliter arcuata, hand plicata, ad regionem umbilicalem reflexiuscula. 



Long, i ; lat. .} poll. Hab. Texas. 



Very variable in its proportions as well as in coloring. Short 

 specimen-; resemble S. campestris of the South, but want its columel- 

 larfold. The elongated specimens are like S. amphibia ; ami in the 

 diminutive size of the aperture it is like S. vermeta. Fresh specimens 

 are well characterized by their golden yellow color. It may possibly 

 be Say's S. undulata. 



Sri i inka ( oncordialis. T. tcnui, lucida, oblique ovatS,, acumi- 

 nata, reflexa, cerea et ad apicem rubicunda, lev iter striata et Lineis 



