40 



Alexander Petrimkevitch, 



Fig. 5. Fig. 6. 



Figure ^. — Eoscorpius typicus n. sp., holotype, U. S. N. A. No. 37986, 

 dorsal surface. — Figure 6. — Same, ventral surface. X ^ 



The abdomen is 16 mm. long. The ter- 

 gites are separated from each other by a 

 considerable space which must have been 

 occupied by the soft chitinous membrane the 

 outlines of which are clearly visible on each 

 side ; this speaks in favorof the assumption 

 that the type specimen was a gravid female. 

 The third and fourth tergites are the widest, 

 the width of the abdomen being in this region 

 6.4 mm. The length of the tergites increases 

 gradually from the first backward, the seventh 

 being the longest. It is ^^^dcr than long, with a slightly procurved 

 anterior edge and sharp angles. All abdominal tergites are with smooth 

 surface. The first post-abdominal or caudal segment is shorter and 

 wider than the second. It has three longitudinal ridges and two rows of 



Fig. 7. 

 Eoscorpius typicus 

 U. S. N. M. No. 



37987, comb. X ^ 



