432 Scientific Intelligence. 
3. Fossil Shells from Tertiary Deposits on the Colt 
near Astoria; by T. A. Conrap.—The following inter | 
“a were collected by J. K. Townsend, and are described at his re- 
A Neeala divaricata, (figs. la, 10. )—Subovate, convex, with divarica- 
ting striee ; extremities rounded; ligament margin very oblique, slightly . 
curved ; basal ma margin curved; beaks near the anterior extremity. 
Fig. la. 
Fig. 18. Fig. 2. Fig. 3. 
© 
N. cuneiformis, (fig. 2.)—Ovate, ventricose in the middle, with strong 
lines of growth; anterior side short, margin rounded; posterior side 
cuneiform ; chine at the extremity ; basal magin rounde 
N. abrupta, (fig. 3.) —Somewhat elliptical, convex; tru 
riorly ; ligament margin recilnear, oblique ; posterior marg 
truncated, contracted. 
Mactra albaria, (fig. dbeRrinugeias, ventricose 
umbonial slope angulated ; anterior and posterior margi 
curved posterior extremity tomes, diveets “tie 
terior side. 
obruta, (fig  &joiete, compressed, thin; very ing 
ligament margin closet basal margin rounded ; anterior h 
gin straight and ‘very oblique extremity truncated. 
i parilis, (fi —Lentiform, sata wen not ventricose ; 
} are Set equal, oo peels prominent ; ; margins very 
ed 
‘ ; summits prominent 5 surface with fine lin growth ; interio . 
extremity acutely rou ; basal wine “foouted poste margin 
— obtusel: sintiedeshions DHL species is remarkably similar in form ae 2 
hoger a fossil of the A miocene ; 3 ite it wants the im- ¥ 
