36 



U.S. NATIONAL MUSEUM BULLETIN 278 



Figure 15.— Caprella penantis, male; a, lateral view; b, gnathopod 2; c, gnathopod 1; 

 d, maxilla 1; e, right mandible;/, left mandible; g, abdomen; h, inner lobe of maxilliped; 

 i, outer lobe of maxilliped. 



individual increases in size there is a progressive loss of 1, then of 

 both spines, and a notch develops in the palm. 



Stoutness of the body and the degree of pleural development 

 appear to be a function of growth, larger individuals having a robust 

 body and weU-developed pleura. 



