PLATE XXXIII. 



PAGE 



Fig. 96. PECTEN MARTINEZENISIS. Magnified. 198 



Fig. 97. P. COMPLKXICOSTA. Natural size. 199 



97 a. Magnified view of the surface. 



Fig. 98. 98 a P. INTER- RADIATA. Natural size. 199 



Fig. 99. NEITHKA ORANDICOSTA. Magnified. 200 



99 a. Section of the ribs. 



Fig. 100. LIMA SHASTAENSIS. Magnified. 201 



Fig. 101. L. MULTIRADIATA. Natural size. 201 



Fig. 102. ANOMIA VANCOUVERENSIS. Natural size. 202 



Fig. 103 b, c, d. OSTREA IDRIAENSIS. Young. 203 



