New Species of Shells, published March nth, 1841, 

 by S. S. HALDEMAN. 



Paludina rufa. I propose this name for Paludina, PI. 3, fig. 1, of 

 this work. Fig. 4 of the same plate is the P. integra of Say. P. 

 rufa is distinguished by the reddish color and entire apex, but it 

 may be a variety of P. decisa. 



Anculosa fusca. Shell subglobular, spire more than half the 

 length of the aperture, with the apex rounded: whirls 3 to 4, slight- 

 ly convex: suture rendered distinct by a slight shoulder on the 

 whirls: body whirl with a slight tendency to obtuse carination: 

 aperture globose-pyriform, rendered obtuse posteriorly by the slight 

 shoulder on the whirls: labium slightly arcuated, and thick in sub- 

 stance: labrum thin and sharp. Color: outside fuscous, livid when 

 worn; labium white; inside with a tinge of pink. Length inch. 

 HAB. Oregon, Mr. Nuttall. OBS. Shell not slender like Anc. 

 virens, nor is the aperture round, as in Anc. Nuttaliaria. 



Ancylus (Velletea) Nuttattii. Shell fuscous, oval, elevated, apex 

 one-fourth of the entire length from one end. Length i^-, breadth 

 |, height | inch. HAB. Oregon, Mr. Nuttall. 



Ancylus diaphanus. Shell translucent, very pale, regularly oval, 

 very wide, depressed; apex subcentral. Length T 3 ^- inch. HAB. 

 Ohio, Mr. Anthony. 



Limnea ferruginea. Shell slender, thin, conical, and diaphanous: 

 whirls 4, convex: suture deep: aperture oval, about as long as the 

 spire: colurnella arcuated, with a distinct fold. \ inch long. HAE. 

 Oregon, Mr. Nuttall. OBS. More slender than L. humilis. 



Pkysa (Diaslrophii) integra. Shell oval, composed of 5 very con- 

 vex whirls: apex pointed: suture very deep: aperture oval, wide 

 posteriorly; peritreme continuous; no columellar fold. Color pale, 

 with white varicose bands. 5 inch long. HAB. Indiana, Mrs. Say. 

 OBS. Larger than P. Diastropha distorta. Hal., and not distorted. 



Melania varicosa, Ward. Shell olivaceous, conical, with 7 convex 

 whirls, flattened at the apex: later whirls marked with thick vari- 

 cose lines: aperture elliptic. Length f inch. HAB. Ohio. OES. 

 Allied to, but less slender than M. exilis. It may prove to be a 

 variety of M. rufula, Hal. 



"Bulimus vermetus, Anthony. Shell turriculated, livid brown: 

 whirls5, striated longitudinally: suture deeply indented: apex entire: 

 body whirl a little more than equal to the spire: spire 2^ times the 

 length of the aperture: length 3, width \\ lines: aperture obliquely 

 ovate: length of the aperture equal to the width of the body whirl. 

 HAB. Ohio near Cincinnati. OBS. Distinguished by its peculiar 

 mouth, which is turned in a regular curve from right to left, con- 

 tracted at the upper angle, and spreading below: the whirls are also 

 very deeply indented and twisted, as they are in Succinea vermeta." 

 J. G. Anthony. 



Melania injlata. Shell conical, with 3 to 4 flat turns: apex trun- 

 cate-eroded: middle of the body whirl slightly carinated: lines of 

 growth undeviating: aperture as long as the spire, very narrow, 

 elliptic, slightly produced, and turned to the left anteriorly. Color 

 brown or green, inside banded with reddish. Length \ inch. HAB. 

 Alabama, R., Mr. Conrad. OBS. Allied to M. stygia. 



Melania curta. Shell short, conical, smooth; spire plane, nearly 

 twice as long as the aperture, which is narrow and quadrate, with a 

 narrow anterior sinus. Color green or chesnut. Length f inch. 

 HAB. Ohio river. OBS. Resembles M. conica, Sayi, but the whirls 

 increase more rapidly in size. 



Physa concolor. Shell oval, spire produced, with the apex point- 

 ed: whirls 4, convex: aperture oval, narrow; columellar fold dis- 

 tinct. Color honey-yellow. Length 0.23 in. HAB. Oregon, Mr. 

 Nuttall. 



Anculosa. {Mudalia) qffinis. I propose this name for a shell allied 

 to "Paludina dissimilis," Say; but which differs from it in having 

 a slight tooth upon the columella. HAB. Ohio, Mrs. Say. 



