PLATE 72 A. 



^*^ By error, this plate is referred to in the text as Plat<! lxxii a. 



Page 



Fig. 1 a, b, c. CoNULARiA ptramidalis. 347 



1 o. A compressed apeeimen preserving a smooth convex apex. Of two similar specimens, one 



has an apparent perforation in the apex. 

 1 6. A broken specimen, which preserves the quadrangular form of the shi'll. 



1 c. Enlargement of the surface as it usually appears under a lens. 



Fig. 2 a, b. CoNULARiA huntiana. 348 



2 a. Figure of a compressed specimen, from which the apex has been broken. 



2 h. An enlargement of the surface, showing the double transverse ridge. 



Fig. 3 a, b, c CoNULARiA lata. 479 



3 a, J. A figure from a cast made in the mould of the shell represented on VUUf cxi, and the 



same enlarged. 

 3 c. An enlargement from a cast made in tlie imprint left in the stone, at one of the angles 

 of the shell, showing an unusual lateral compression of the nodes, a feature shown in 

 some degree upon all specimens. 



Fig. 4. Conularia desiderata ( n. s.). 480 



(CONULARIA ? Text, p. 480.) 



4. A fragment near the apex, enlarged. So far as can be discovered, this species has never been 

 marked by longitudinal ridges or nodes, the transverse ridges being smooth and eonf iuuous. 



