94. BRITISH BELEMNITES. 
In the Table of Distribution of Belemnites given at p. 93, I have introduced the names of 
several well-known and definitely characterised Ammonites in their ordinary places in the 
strata. ‘This might have been done to a greater extent, and thus a more minute com- 
parison have been made with the similar and equally well-known Ammonitic zones on the 
Dorsetshire coast. But this subject will come under a more full examination hereafter, 
when the Belemnitic beds above that which is so famous at the foot of Golden Cliff shall 
have been as fully explored as have been the contemporaneous parts of the Yorkshire 
section. Mr. Day and Mr. Etheridge have already made good progress in this work, 
which is not so easy on the Dorsetshire as on the northern coast. 
I now present, in a diagram, a classification of Yorkshire Lias, according to natural 
divisions of the series, adopting as few groups as possible ; and in this scale of time I 
have written the species of Belemnites already described from the cliffs of Saltburn, 
Staithes, Whitby, and Robin Hood’s Bay. 
| 
| 
| 
| 
| 
Distribution of certain 
species of Belemnites in 
the strata of the York- 
shire coast. 
| B. acutus. 
| B. dens. 
| B. penicillatus. 
| B. elegans. 
| B. scabrosus. 
| B. pollex. 
| 8. inzequalis. 
| B. rudis. 
| B. paxillosus. 
cylindricus. 
| B. acuminatus. 
B. breviformis. 
| B. tripartitus. 
| B. tubularis. 
| B. striolatus. 
| B. subtenuis. 
| B. dorsalis, . 
| 
| 
Alum Shale. Leda Beds 
* | 8. subaduncatus. 
* | B. vulgaris. 
% | B. Voltzii. 
7) 
* 
* 
% 
* 
* 
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