9' 



% 



PLATE 59. 



Fig. 1, 2, 3. Endocbeas pkotbiforme. (Pag. 216.) 



1 a, b. Vox. tenuitextum. The surface markings on two diflerent specimens, somewhat enlarged beyond the 



natural size. 



2 a, b. Var. tenuistrialum. The surface markings on two different specimens, both sliglitly magnified. 



3 a. Var. lineolatum. This presents only transverse strise ; but some specimens show minute longitudinal ones, 



passing into the preceding variety. 

 3. Var. lineolatum. The surfaec is covered by fine spots or stigmata, as if some adhering softer substance had 

 been separated from it. The same is observed in 2 b, in a less degree. 



Fig. 4. 287. 1. CoNULARiA trentonensis. (Pag. 222.) 



4 a. A specimen (natural size), with the apex broken off. 



4 b. Another specimen, more abruptly acute. 



4 e. Transverse section of 4 a, near the apes, showing the septum and sipbuncle. 



4 d, e. Lateral and transverse view of a fragment, showing the convex septum. 

 4/. A portion of the surface enlarged. 



Fig. 6. 288. 2. Conularia oranulata. (Pag. 223.) 



5 a. A specimen nearly entire, giving the general form of this species. 

 5 i. A portion of the surface enlarged. 



Fig. 6. 289. 3. Conulaeia papillata. ( Pag. 223.) 



a. An imperfect specimen, of the natural size. 6 6. A portion magnifled. 



Fig. 7. 290. 4. CoNXTLABiA GEACiLE. (Pag. 224.) 



7 a. A specimen (natural size), the apex broken off. 7 6. A portion of the surface enlarged. 



