2 26 Alexander PctrunkcvitcJi, 



separate, posterior ones contiguous. Abdomen oval, lighter in 

 color, sparsely covered with thick, simple hair, with a darker spot 

 in the middle of the genital area. On one side of the dark spot 

 two faint impressions, one behind the other, possibly imprints of 

 the lung-books. The spinnerets are well preserved, covered with 

 simple hair, spinning tubes not discernible. First pair of spinnerets 

 small and far apart. Second pair large, three-jointed, at least 

 three times as long and considerably stouter than anterior spin- 

 nerets. Pedipalps with a pectinate claw. Legs and pedipalps 

 covered with simple, thick hair and scattered spines which are 

 rather weak. Tarsal joints of legs apparently without scopula, 

 with a pair of pectinate claws. The claws of the third right 



Figure 2. — Eodiphirina cockcrclli n. sp. A claw of the third left foot. 

 X 135- 



tarsus (in the specimen on the left side) are especially well pre- 

 served. Its structure is shown in textftgure 2 drawn with the aid 

 of an Abbe drawing apparatus at a magnification of 135 diameters. 

 The claws are with a series of from 8 to 9 teeth increasing in size 

 from the base of the claw distally. Legs : 4123. 



Measurements of the Legs in Millimeters. 



Patella + Tibia Metatarsus 



5-2 2.5 



31 



The specimen is in the collection of Professor T. D. A. Cock- 

 erell of the University of Colorado and is from Florissant. 



I am unable to place this species in any recent genus. It shows 

 certain relationship with P>rachythele which however have claws 

 with a d()ul)le series of teelh and other characters partly different 

 partly indiscernible in llodlplnrlna cockcrclli. 



