F3L,A.TE 3. 



Fig. 1. In^ocekamus okipsii, raj', subundatus ; right valve, reduced to less than 



two-tbirds the natural diameter 358 



1 a. Profile of same, in outline. 



Fig. 2. Outline view of one of Morton's original specimens of Inoeeramus Bara- 

 hini, for comparison with figs. 1 and 3 ; reduced as above. 



2 a. Profile of same. 



Fig. 3. IxocERAJius cripsii, var. scbundatus ; left valve, reduced as above . .. 35B 



3 a. Outline profile of same. 



Fig. 4. Cardium (Protocardia) scitulum ; cross-lines showing natural size. .. 360 



4 a. Eight valve, enlarged. 



Fig. 5. Gramjiatodon ? vancouverensis ; right valve, reduced as above 357 



5 a. Profile view of same. 



Fig. 6. Dentalium komooksexsis ; reduced as[above Mi 



Fig. 7. Heteroceras cooperi ;^view of outer or dorsal side, reduced as above . 367 

 7 a. Ventral side of same. 



