affor 

 in P 



t an acute post-ocular spinule or epine that 

 n either simple, or two-spined, or emarginate 



'ace, and independent. External maxillipeds 



with 



e and much longer than 



Lambrach jevz. 



1 ap- a A Rostrum 



very formed of two 



jome long spines ; 



spi- none of the legs 



calks subchelate Echinoplax. 



ack- 



ever bA Rostrum 

 short, bifid : last 

 pair of legs sub- 

 chelate GrYPACHjEUS. 



I. 



t jd appendages smooth or 

 rlfew spines : no post-ocu- 

 e' the eye-stalks hardly 

 backwards Ach^us. 



hort, not reaching to the 



Paratymolus. 



II. 



1 antennal joint project- 



Physach^ius. 



eye-stalks much curved : 



Camposcia. 



ce : no post-ocular spine : 



Oncinopus. 



mcealment : basal anten- 



Platymaia. 



unding parts, its antero- 

 Alle merus as broad as or 



and thus concealing, the 

 adult, many times the 

 Excephat.oipes 



1. 



[&\ branchial regions : 2nd 



Inachoides. 



Apocremnus. 



ITie Collopes. 



