*12 LAND AND FRESH-AVATER SHELLS OF N. A. [I'AHT II. 



Limnxa p/icata, Lea, meutioued by name Only in tlie Canadian (Jeologi- 



cal Report for 1858, by Mr. D'Urban, is, I suppose, L. plica, L«;i. 

 Limnxa fossaria is quoted without description from Canada, &c., liy .1. 

 DE C. SowERBY in Ricliardsou's Fauna Boreali-Americana, III, 31 G 

 (183G). 

 Limnxa merostoma, Rav. Cat. p. 11, err. typ. for macrostoma. 

 Limnxa platystoina, Haldeman. — Shell thin, transparent, and globose ; 

 composed of four whirls, the last of which constitutes nearly the 

 entire shell; aperture | the entire length, very wide 

 Fig. 116. losteriorly ; labium and labrum nearly parallel. Length 

 2 inch. 



Hub. Vermont. {Ilaldeman.) 



Limnxa platystoma, Haldeman, Suppl. to Men. pt. I, 



p. 2 (1840). 



The above is Haldeman's description, and Fig. IIG is 



from his type. No. 9131 was presented by him. Thus 



we have all the information extant regarding the species. As Prof. 



Haldeman's original label refers the shells to Maine or Marseilles, it 



must be considered a doubtful inhabitant of America. 



Limnxa aUernata, Sat, mentioned by name only by Bell (Ca'n. Geol. 

 Rep. for 1S5S) is unknown to me, as is also L. opacina, Bell. 



Fossil Species of Limnxa. 



I am indebted to the kindness of Dr. Meek for the following list of fossil 

 species : — 



TJnmxa vetusta, Meek, Proc. Acad. Nat. Sc. 1860, 314. 



Limnxa similis. Meek, Proc. Acad. Nat. Sc. 1860, 314. 



Limnxa diaphana, Evans & Shomard, Proc. Acad. Nat. Sc. VIII, 1860, 165. 



Limnxa nebrascensis, Evans & Sn. Proc. Acad. Nat. Sc. VIII, 1860, 165. 



Limnxa tenuicostatus, Meek & Hayden, Proc. Acad. Nat. Sc. 1860, 117. 



Limnxa meekiana, Evans & Shdmard, MSS. 



Limnxa^ multistriata, Meek & H^-den, Proc. Acad. Nat. Sc. 1860, 431. 



Limnxa (Limnophysa) galhnna, Sat. — Shell subovate ; whirls nearly 



five, very convex ; suture very deeply impressed ; apex 



Fig. 117. acute ; body whirl a little flattened in the middle ; 



A aperture not dilated ; columella with the sinus of the 



M )\ fold very obvious. Length three-tenths of an inch ; 



^(J aperture rather more than half the whole length. 



Limnma ^^'^^ *^^"*^ shell I am indebted to Mr. Nuttall, who ob- 



galbana. taiaed it in a marl pit near Franklin, New Jersey. He 



