THE C'EPHALOTHORAX. 



153 



which lie immecliatel}' in front of the hindermost, there 

 is a small round aperture for the attachment of the 



siv 



Fig. 3d.—A.<ttaci/sfiiviatili.t. — The ceplialothoracic sterna and the endo- 

 phragmal system ( x 2). A, from beneath ; B, from above. (/, a', 

 arthrophragms or partitions between the articular cavities for the 

 limbs ; r.'/y^ cephalic apodeme ; r;/', cervical fold ; cj/n. i.epimeronof 

 the antennulary somite ; //, anterior, and /('. posterior horizontal 

 process of endopleurite : Ih, labrum : m, mesophrag-m ; iiif, meta- 

 stoma ; p, paraphragm ; 7 — XIV, cephalothoracic sterna ; 1 — 14, 

 articular cavities of the cephalothoracic appendages. (The anterior 

 cephalic sterna are bent downwards in A so as to bring them into 

 the same plane with the remaining cephalothoracic sterna ; in B 

 these sterna are not shown.) 



