Tertiary Spiders and Opilionids. 



257 



visible on the third right tibia, two spines on the fourth left 

 metatarsus. 



Total length with chelicerae 7 mm. Carapace oval, apparently 

 slightly longer than wide, although its anterior edge is not clearly 

 defined. The abdomen is oval. The total length of the third 

 leg is 7.1 mm., that of the fourth — 11.6 mm. The pedipalpi are 

 not discernible. 



Palaeopachygnatha cockerelli n. sp. {Textfigure 2^). 



One male from Florissant in the T. D. A. Cockerell Collection 

 of the University of Colorado. 



Figure 25. — Palccopachygnatha cockerelli n. sp. x 3.33. 



The specimen, presenting the dorsal surface only, is not very 

 well preserved and little detail can be made out. In general the 

 spider has the appearance of a recent Pachygnatha. The cheli- 

 cerse are hidden under the copulatory apparatus of the pedipalpi, 



