35 



Subgenu3 PI.KS mi' i x K i . 



PUiioptiunu, Bate, Ann. Mag. Nat. Hilt., Sept. 1H81, p. 1881 : Fnxon. Mem. Mui. Ci.mp. 7.ool. XVIII. 1895, 

 p. 109 (part). 



Aritei<, Wood-Mason, Toe. cit. fpnrt : Aritttrui enruteam). 

 Aristacoptis, Wood- Mason, Inc. cit. (part : Arittatnpiii edtcardiiana). 



Rostrum 3-toothed, either long in both sexes, or long in the female and of 

 moderate length in the male. Cervical groove either d^tinot or indistinct. An 

 orbital and branchiostegal spine : no hepatic spine. 



The last 3 or 4 abdominal terga are carinated, each carina ending in a 



spine. 



The terminal joint of the mandibular palp is triangular, sometimes with its 

 postero-mternal angle much produced. The exopodite of the 2nd ma. \illipeds 

 is much longer than the endopodite and is compressed and stiffish. The dactyli 

 of the last 2 pairs of thoracic legs are either setiform or lanceolate. 



The 3rd pair of thoracic legs have a podobrandi, and the 4th pair an 

 epipodite. The pleurobranchiae in advance of somite XIV, though much re- 

 duced in size, are plumose and functional. 



The branchial formula is as follows : 



. , Arthrobrancliia'. 



Podobranchife. , 

 Appendages. 



VII 



VIII 



IX 



X 



XI 



XII 



XIII 



XIV 



Total 



5+7ep. 



6+ Ismail l + Gsroall = 17 + 7 small + 7 ep. 



of the Indian xy,,r/. x if flu *ul>ij< ///'.- I'lcsiopeneus. 



I. Cervical groove indistinct : the c-u-ina' of the last 4 abdominal 

 terga end acutely : terminal joint of madibulnr palp 

 bifurcate owing to the length of the postero-internal angle : 

 dactyli of last 2 pairs of thoracic legs lanceolate 



II. Cervical groove distinct : only the last 3 abdominal terga are 

 carinated : terminal joint of the mandibular palp simply 

 triangular : dactyli of the last 2 pairs of thoracic legs 

 setiform 



A. (P.) edtctird- 



A. (P.) coruscans. 



