II. 



Page. 



FIG. 1. BACULITES ANCEPS ? : 130 



1 a. Side view. 



1 b. An antisjphonal view. 



1 c. A section of same. 



1 d. A sept'iim of same. 



1 e. A more slender, less compressed individual, with rounded nodes instead of transverse rostai. 



I/. An antisiphonal view of same. 



1 g. An enlarged septum of the same. 



1 h. Transverse section of the same. 



Km. 2. BACULITES ANCEPS, after D'Orbigny, for comparison 



2 a. Transverse section. 



2 ft. A septum. 



FIG. 3. PKIONOCYCLUS ' MACOMDI 1 ;{ 2 



3 a. Side view. 



3 ft. An antisipbonal view. 



Jc. A septum of the game, enlarged. 



3rf. An autisiphoual view of a very small specimen. 



FIG. 4. ACTION INTERCALARIS 1 -'.' 



4 a. View showiug the aperture, which is imperfect in the specimen figured. 

 4 6. A back view of the same specimen. 



4 o. Surface-stria;, enlarged. 



FIG. 5. ANCHURA ? NEWBERR YI 12r> 



FIG. 6. CARDIUM BELLULUM 128 



6 a. Side view. 



6 ft. Anterior view (the left valve being restored). 



FlG. 7. CUASSATELLA SHU.MARDI 127 



7 a. View of a specimen, with the lower part of the valves imperfect. 

 7 b. Cardinal \ iew of the same. 



7 c. An internal cast of a larger specimen. 

 FIG. 8. Ax UNDETERMINED BIVALVE, from the fame rock as fig. 7. 



