Cumt 



njiixillipetLs with second joint usually produced into a plate furnished with 

 coupling spines, the third joint obscure, rarely the last joint degraded with 

 the three preceding joints fused into one, the branchial leaflets varying in 

 number from two or three, or in female even none, to several dozens. 

 Second maxillipeds having at the base a pair of plates, perhaps epipodal. 



Fig. 3. 

 Larval stage of Diastylis lucifer (Kroyerj, after Sars. 



Fig. i. 

 Later larval stage of Diastylis lucifer (Kroyer), after Sars. 



Fig. 3 and 4. a' antenna 1, a' antenna 2, hr.exp. exopodal part of the Vjranchial apparatus, 



h heart, t intestinum, L anterior lip, I posterior lip, I liver sacs, U mandibles, »i' anterior 



maxilla, m^ posterior maxilla, mp^—mp'' maxilliped 1—3, eye, p'-" peraeopod 1—4, R rostral 



plates of carapace, t telson, urp uropod, v remnant of the yolk-mass. 



which in the female send a fan of filaments into the incubatory cavity. 

 Third maxillipeds more or less leglike, almost always provided with exopods. 

 The live pairs of peraeopods not chelate or subchelate, the 2"^^ joint normally 

 the longest, stout! or otherwise in accord with the exopodal furniture; the 

 third joint in maxillipeds and peraeopods scarcely ever elongate, sometimes 



