408 DESCRIPTIONS OF NEW SPECIES OF FOSSILS, 



Fig. 13, a. Capulus occidentalism cast of interior of convex valve. 



" 13, J. Profile view of same. 



" 13, c. Base of same. 



" 13, d. Surface-markings of the base, magnified. 



Plate II. 



Fig. 1, a. Inoceramus suhlcsvis, right valve, nearly entire. 

 " 1, S. A portion of the surface magnified. 



Fig. 2, a. Inoceramus coyivexus, left valve. ^ 

 " 2, b. Profile of same, looking upon the hinge line. 



Fig. 3, a. Inoceramus tenuilineatus, left valve. 

 " 3, 1). A portion of the surface of the anterior part of the shell, magnified. 



Fig. 4. A portion of the striated surface of the shell of Inoceramus sagensis, magnified. 



Fig. 5, a. Inoceramus Conradi, the e.\terior portion of the shell of both valves, which are distorted by 

 pressure. 

 " 5, h. Surface of same, magnified. 



Fig. 6, a. Inoceramus fragilis, natural size. 

 " 6, h. Surface of same, magnified. 



Plate III. 



Fig. 1, fl, I. Natica olliquala, two views of the same shell. 



Fig. 2, a. Natica concinna, natural size. 

 " 2, h, c. Two views of the same, magnified. 

 " 2, d. The surface strite, magnified. 



Fig. 3, a, h. Natica paludinaformis, two views of individuals of different size. 

 " 3, c. The surface magnified, showing the cancellated striae. 



Fig. 4, a. Actceon concinnus, natural size. 

 " 4, J, c. Same, magnified nine times. 

 " 4, d. Surface-markings, highly magnified. 



Fig. 5, a. Buccinum vinculum, natural size. 

 " 5, h. Magnified view of the same. 



Fig. 6, a. Fusus Shumardi, natural size. 

 " 6, h. Magnified view of the opposite side of the same shell. 

 " 6, c. Surface-markings, magnified. 



