PLATE XXXIII. 



PAGE 



Fig. 96. Pecten Maktinezensis. Magnified. 198 



Fig. 97. P. comi'lexicosta. Natural size. 199 



97 a. Magnified view of the surface. 



Fig. 98. 98 a. P. inter-radiata. Natural size. 199 



Fig. 99. Neithea gkandicosta. Magnified. 200 



99 a. Section of the ribs. 



Fig. 100. Lima Shastaensis. Magnified. 201 



Fig. 101. L. multikadiata. Natural size. 201 



Fig. 102. Anomia Vancouverensis. Natural size. 202 



Fig. 103 b, c, d. Ostkea Idriaensis. Young. 203 



