662 ARTHROPODA SUB-KINGDOM VII 
the feet non-chelate. Carapace very thick and rigid, its frontal portion always united ra 

Fic. 1385. 
Aeger tipularius, Schloth. sp. Lithographic Slates ; Eichstiidt, Bavaria. 2/3. 
with the segment of the antennulae. The oldest representatives, Scapheus and 

Fic. 1886. 
Eryon propinquus, Schloth. sp. Lithographic Slates ; Solenhofen, Bavaria. 1/y. 
Praeatya, Woodward, are Liassic. Mecochirus, Kef. (Fig. 1387), is found in the Middle 

