90 



Alexander Petriinkevitch . 



The cephalothorax is rounded anteriorly, the posterior edge almost 

 straight. A deep, oval depression somewhat behind the middle 

 of the cephalothorax, and behind the depression a transverse ridge. 

 Eye tubercle transversely ellipsoidal, high, eyes not preserved. Ab- 

 domen composed of eight segments, oval, its right side somewhat 

 pressed out of shape and lower than the rest, yet clearly showing 

 segmentation. Since the spinnerets were probably on the ventral 

 surface as in Liphistiiis, the number of visible segments may not be 



I 



Fig- 54- 

 Figure ^^. — Arthrolycosa antiqua Harger. No. 163, Peabody Museum, 



showing the specimen as it appears on the nodule. X -j- 



the true number. Mandibles strong, conical, the fang not visible. Pedi- 

 palpi slender, their terminal joints missing. Legs heavy and long, 

 but only the right leg of the second pair complete. Femur 5.7 mm. 

 long, patella and tibia 9.5 mm. metatarsus 5.0 mm., tarsus 3.7 mm. 

 Fourth femur punctate. 



It must be added that the specimen presents its actual dorsal sur- 

 face and not a mould of it, as is evident from the appearance of the 

 eye tubercle and oval dorsal depression. 



Specimen No. 162 of the Peabody Museum (Plate Mil, fig. 43). 

 Like the type specimen, the dorsal surface is not a mould, but the 

 actual surface of the spider. Total length 14 mm. Cephalothorax 

 6.2 mm. long, the side margins obliterated so that the width cannot be 



