EXPLANATION OF PLATES. 



(Pages 519 to 583.) 



PLATE LXXXVI. — Placenticeras placenta Dekay ?. Fig. 1, septum of inner 

 volution, magnified; figs. 2, 3, two views of small specimen. 



Serpula tenuicarinata M. & H. Fig. 4, copy of White's figure. 



Modiola (Brachydontes) multilinigera Meek. Fig. 5, left valve (after 

 White). 



Avicula gastrodes Meek. Figs. 8, 9, two left valves (after Stanton). 



PLATE ~LXXX\"II.— Inoceramus frag ills H. & M. Fig. 1, right valve of one 

 of Whitfield's types of /. perpleccus; fig. 2, a large right valve (after Meek); 

 .figs. 3, 4, two views of /. hoivellii (after White); fig. 5, a large example 

 (after Stanton). 



PLATE LXXXVIII. — Inoceramus exogyroides M. & H. Figs. 1, 2, two views 

 of left valve, cast (after Meek). 



PLATE LXXXIX. — Inoceramus umbonatus M. & H. Fig. 1, dorsal view of 

 cast of left valve (after Meek); fig. 2, anterior view (after Meek). 



PLATE XC. — Inoceramus flaccidus White. Fig. 1, left valve (after White). 



PLATE XCI. — Ostrea lugubris Conrad. Fig. 1, small lower valve (after Con- 

 rad) ; figs. 2 to 10, other views (after Stanton). 



PLATE XCII. — Inoceramus deformis Meek, Fig. 2, anteiior view of small 

 specimen (after Stanton). 

 Inoceramus gilberti White. Figs. 1, 3, two views of left valve (after White). 

 Inoceramus labiatus Schloth. Fig. 4, small right valve (after Stanton). 

 Mactra emmonsi Meek. Fig. 11, cast of left valve (after Stanton). 



PLATE XCTII. — Haploscapha eccentrica Conrad. Fig. 1, interior view of 

 valve; fig. 2, exterior view of same (after Meek). 



PLATE XCTV. — Haploscapha grandls Conrad. Figs. 1, 4, interior views of 

 valve (after Meek); figs. 2, 3, views of hinge. 



PLATE XCV. — Inoceramus undabundus M. & H. Figs. 1, 2, two views of 

 left valve (after Meek). 

 Inoceramus tenuiro stratus M. & H. Figs. 3, 4, two views of type specimen 

 (after Meek). 



(515) 



