8 HiCKLING, British Periiiian Footprints. 



some of the impressions. Harkness describes the small 

 manus as having five thick short digits. Jardine mentions 

 three or four. I cannot distinguish more than four. The 

 name BatricJnuis was instituted by Harkness in the fore- 

 going paper for another allied print. 



It may be thought that the very small manus of this 

 form, should cause its removal from the chelichnoid group. 

 As, however, it agrees in all other essentials, with the 

 members of that group, and as the}' show considerable 

 variation in the proportions of pes and manus, I prefer to 

 keep it here under the term CI. 3. This form is recorded 

 only from Green Mill, Caerlaverock. The type is in the 

 Edinburgh Museum. 



HerpeticJuuis Bucklandi, Jard. (Jard., '50, p. 209) 

 is shown in Fig. 18, from Jardine's plate VII. It is a very 

 unsatisfactory print, which I should not have figured but 

 for the fact that similar small impressions are common at 

 Mansfield. The track is broad and rather irregular, the 

 prints being in pairs in the relative position indicated in 

 the figure. There is nothing to indicate which is pes and 

 which manus. Jardine states that four digits are some- 

 times discernible. I see no reason whatever for referring 

 it to the herpetichnoid group. So far as it can be made 

 out, it seems to be a small chelichnoid form. It may be 

 referred to as CI. 4. 



Herpetichnoid forms. — The "genus" HerpcticJinns was 

 founded by Jardine in 1850 (Jard., '50). 



HerpctichiiJts saujopU'sins, Jard. (Jard., '50, p. 209), 

 is stated b}' Jardine to be one of those originally 

 described by Duncan (presumably the No. 3 of Duncan's 

 account) and to be the commonest type of impression 

 after CI. i. They are, unfortunately, nearl\- al\va}'s 

 im[Derfect. Fig. 17 shows a right pes and nianus from 



