248 



NEW YORK STATE MUSEUM 



Pisidium ultramontanum Prime 1865 (Fig. 182). P. ultra- 



m o 11 1 a 11 11 m Prime (1865. Smith. Misc. coll. no. 



J^%, v 145, p. 75) 



•■ \ Shell solid, oval or sub-orbicular, and remarkably 



I compressed; anterior side much produced between 



', . ' ■-.-.--■ ;f the extremity of the lateral teeth and the junction with 



the basal margin; posterior margin well rounded; 



Fig. 182 pisidium beaks small and only slightly raised above the outline 



ultramontanum. x3 r , , 1 1 1 , 1 , • r 1 1,1 



01 the shell; the striae very fine and even, and the 

 hinge line straight. 



Locality. Goat island. 



Pisidium scutellatum Sterki. 1896 (Fig. 183). P. scute 11a- 

 tum Sterki (1896. Nautilus, 10:66) ^~ 



Shell high, oblique, slanting downward anteriorly, 

 well rounded and rather strongly inflated; beaks pos- v.^. "' 

 terior, rather large and prominent, margins well curved, Fig 183 Pisi . 

 the surface polished, having irregular growth lines; the J^" 1 |g utella " 

 hinge fine and short; cardinal teeth lamellar, the one in 

 the right valve moderately curved, its posterior end being thickest; 

 the inferior in the left valve curved; the superior almost straight; 

 the lateral teeth very short, abrupt, pointed and thin, projecting 

 somewhat into the cavity of the shell. 



Locality. Goat island. 



Genus lampsilis Rafinesque. 1820 



Shell inflated, rather thin, and shining, sometimes having a pos- 

 terior ridge; sculpture coarse at beaks. 



Lampsilis rectus (Lam.) Smith 1899 (Fig- I 84)- U n i o 



( 



•£& 



SIP? \ 



Fig. 184 Lampsilis rectus 



recta Lamarck (1819. Animaux sans zrrtebrcs, 6:74) Lamp 

 silus rectus Smith (1899. U. S. fish com. Bui. p. 290) 



