Grand Canyon of the Colorado. 345 



Specific characters. — Maims : Somewhat smaller than 

 the pes, with three well-defined, radiating digits, the mid- 

 dle one of which is directed forward. An obscure 

 impression of an additional digit lying on the inner side 

 of and more nearly parallel to the second is indicated. 



Fig. 4. 

 m 



p 



^ ^ ! 



Fig. 4. Exocampe (?) delicatula, n. sp. Right m anus (o) and pes (b). Natural 

 size. 



There is also at the base of the second digit what may 

 represent a palmar pad. It may, however, be accidental, 

 as there are other such on the slab. 



Pes : The four phalangeal impressions are more or less 

 ovoid, without indications of claws or phalanges, and, 

 except for the first, curve slightly outward. There is a 

 faint mark which may indicate a fifth digit. The pes 

 impression lies immediately behind that of the manus 

 and a little apart from it as the figure indicates. 



Dimensions. 



Manus. 



mm. 



Length 5-5 



Width 70 



Length of digit ii 4-3 



" " iii 40 



" '■' iv 2-7 



Pes. 



Length 70 



Width 8-8 



Length of digit i 2-8 



" " ii 30 



" " iii 3-3 



" " iv 3-3 



There lies in advance and to the left of the impressions 

 we have discussed a series of five minute rounded marks 



