'. 



PEL' 



.LA. 



123 



TEIBE I. PACHYCEPHALA. 



Anthosoma (Leach). Head large, oval; body 

 lengthened. Thorax furnished with large plates ; 

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



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



Nicothoe (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. f. 



203 



204 



205 



206 



207 



208 



TRIBE II. PELTOCEPHALA. 



Swimming plates on the dorsal surface 



of thorax Pandaridc 



No swimming plates on thorax . . Caligida. 





