ASTACUS 



i. Dorsal view: cephalo-thorax ; rostrum; cervical groove ; branchiostegite; abdominal terga; felson; uropod; 

 eye; antenmde; antenna; scale of antenna ; great chela; ambulatory limbs. 



CrrtAX G 

 oc-w . \. ^- t -TS -r / / f 



if a. 







2. Fifth abdominal segment from behind : terguin; sternum; articulation of appendage ; biramous swimmeret. 







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