60 Alexander Petrnnkevitch , 



From the Pennsylvanic (Lower Allegheny) of Mazon Creek, Illinois. 

 2. G. anglicus Pocock, Carb. Arachn., 1911, p. 32, pi. I, figs. 4— 4d. 



From the Coal Mesaures of Coseley, near Dudley, England. 

 Telyphrynns n. gen. 



Genotype T. elongaius n. sp. 

 I. T. elongatus n. sp. 



From the Pennsylvanic (Lower Allegheny) of Mazon Creek, Illinois. 



Protophrynus n. gen. 

 Genotype P. carbonarius n. sp. 

 I. P. carbonarius n. sp. 



From the Pennsylvanic (Lower Allegheny) of Mazon Creek, Illinois. 



KEY TO GENERA OF NORTH AMERICAN CARBONIFEROUS 

 PEDI PALPI 



1. Cephalothorax longer than broad. Abdomen with a whip — Sub- 

 order Uropygi Geralinura. 



+ Cephalothorax wider than long. Abdomen without a whip — 

 Sub-order Amblypygi 2 



2. Coxae of 3d and 4th pair of legs joined in a median line, not 

 triangular. Eyes absent Telyphrynus. 



+ coxae of 3d and 4th pair of legs converging toward a point 3 



3. Abdomen with 7 visible tergites. Trochanters i-jointed. Four 

 eyes Protophrynus. 



+ abdomen with 10 tergites. Trochanters 2-jointed. Two eyes 



Graeophonus. 



DESCRIPTION OF NORTH AMERICAN CARBONIFEROUS 

 PEDIPALPI 



Sub-Order Uropygi. 

 Family Thelyphonidae Lucas 

 Genus Geralinura Scudder. 

 (New definition.) Cephalothorax entire, longer than wide. Ster- 

 num composed of one piece. Abdomen with twelve segments. 

 Whip many jointed. 



Key to North American Species of Geralinura. 



I. No constriction between the cephalothorax and the first abdominal 



tergite. Coxae of 4th pair of legs rectangular and contiguous 



G. similis n. sp. 

 + a distinct constriction between the cephalothorax and the ist 

 abdominal tergite ; abdomen anteriorly rounded 2 



