662 ARTHROPODA , SUB-KINGDOM vn 



the feet non-chelate. Carapace very thick and rigid, its frontal portion always united 



FIG. 1385. 

 Aeger tipularius, Scliloth. sp. Lithographic Slates ; Eichstadt, Bavaria. 2/ 3 . 



with the segment of the antennulae. The oldest representatives, Scapheus and 



FIG. 1386. 

 Eryon propinquus, Schloth. sp. Lithographic Slates ; Solenhofen, Bavaria. i/ 2 . 



Praeatya, Woodward, are Liassic, Mecochirus, Kef. (Fig. 1387), is found in the Middle 



