PELTOCEPHALA. 



123 



Tribe I. Pachycephala. 



Anthosoma (Leach). Head large, oval; body 

 lengthened. Thorax furnished with large plates ; 

 all the feet leaf-like ; foot-jaws large. 



A. Smithii (On Shark). Fig. 200 ; n. s. 



Nicotkoe (M.-Edw.). Head round; body pear- 

 shaped; thorax dilated into two large wing-like 

 lobes ; foot-jaws very small. 



N. astaci (On gills of Lobster). Fig. 201 ; mag. ■§-. 



202 



203 



204 



205 



206 



\ 



\ 



\ w 



7^Jt M % 



207 



208 



Tribe II. Peltocephala. 



Swimming plates on the dorsal surface 



of thorax Fandaridce. 



No swimming plates on thorax . . Caligidce. 



