LIMN.EA. 



73 



considers it fossil, as well as numerous specimens of Planorhis cam- 

 pamdatus, Valvata tricarinata, and Physa heierostropha, found with 

 it. I have never seen a recent specimen, hut the present corre- 

 sponds with some individuals helongiug to the Philadelphia Museum, 

 also said to be fossil. (Sny.) 



Limnseus galbanus, Say, Jour, Acad. Nat. Sc. Phila. V, 123 (1825) : 

 Binney's ed. 114. 



Limnsea galhana, Haldeman, Mon. 51, pi. xiii, f. 22, 23. 



Mr. Say's type, still preserved in the Philadelphia Academy is 

 drawn in Fig. 117. I have heard of no other locality than that 

 given by Say. 



Cat. No. 

 9340 



No.ofSp. 



10 



Locality. 



New York. 



From whom received. 



Dr. Lewis. 



Remarks. 



■? Ijereiidti, Pfeiffer. Fig. 118 is drawn from Fig. 118. 



a curious shell lately received by the Smithsonian Insti- 

 tution from Mirador, sixty miles west from Vera Cruz, 

 under the name of Physella herendti, Pfr. It belongs 

 to a new genus, but Physella is preoccupied by Halde- 

 man. 



herendti. 



POMPHOLYX, Lea. 



Tentacles short, stout, rounded. Mantle^ — ? Foot short, 

 bluntly rounded posteriorly. 



Shell dextral, depressed-globose, translucent, horn-colored'; 

 spire short, obtuse, last whirl very wide, ventricose ; aperture 

 very large, wide, subcircular, expanded ; inner lip thickened, 

 outer lip acute. 



Jaw — ? 



Lingual membrane — ? 



' I have seen only specimens in alcohol. From these it appears that 

 the only known species cannot be a Limnsea, a« its tentacles are not 

 flattened and triangular. The eyes are at the place usual in Limnaeidx. 



