Inst an acute post-ocular spinule or spine that 

 afford im either simple, or two-spined, or emarginate 

 {in PI 



with 



A"face, and. independent. External maxillipeds 



>le and much longer than 



LAMBRACH.EUS. 



id ap- a.* "Rostrum 



very formed of two 



some long spines ; 



spi- none of the legs 



talks subchelate Echinoplax. 



back- 



lever b* Rostrum 



short, bifid : last 



pair of legs sub- 

 I. C chelate Grypach^eus. 



ty 



rhyd appendages smooth or 

 elo few spines : no post-ocu- 

 gul the eye -stalks hardly 

 for>ackwards Achjeus. 



ihort, not reaching to the 



Paratymolus. 

 il antenna! joint project- 



Physach^us. 

 eye -stalks much curved : 



Camposcia. 



,ce : no post-ocular spine : 



Oncinopus. 

 II. (bncealment : basal anten- 



Platymaia. 



Alliajunding parts, its antero- 

 ee merus as broad as or 



, and thus concealing, the 

 i adult, many times the 

 EL Encephaloides. 



al branchial regions : 2nd 

 Inachoides. 



II. R 



, Apocremnus. 



e COLLODES. 



