68 



BULLETIN 201, UNITED STATES NATIONAL MUSEUM 



Endopod (fig. 15, b) of the third to the eighth thoracic limbs with 

 the carpus distinct and the propodus undivided; in the third limbs 

 the carpus is half as long as the propodus and the dactylus is more 

 than one-third but less than one-half the length of the carpus and 

 propodus combined. 



Figure 16. — Siriella chicrchiae Coifmann: a, Telson, X 64; b, uropods. 



Telson (fig. 16, a) rather narrowly lanceolate, three and one-third 

 times as long as broad at the base, lateral margins with three large 

 proximal spines separated by an unarmed interval from the distal 

 series of spines in which the larger spines are separated by groups 

 of three, four, or five smaller spines, apex armed with a single pair 

 of long stout spines, between which are three equal small spines and 

 a pair of plumose setae. 



