MARINE GAMMARIDEAHST AMPHIPODA 



101 



Figure 50. — Ampithoidae, pereopods glandular, like Isaeidae and Aoridae but peduncle of 

 uropod 3 elongated and lower lips with characteristic shape, usually with notched outer 

 lobes: a, coxa 4, note lack of posterior excavation; b, extremes of accessory flagellum; 

 c,d, lower lips, outer lobes usually notched or excavate medially [see Ischyroceridae, 

 Isaeidae, Aoridae, Corophiidae]; e, uropod 3, note elongate peduncle, short rami, presence 

 of one or two large distal spines on outer ramus [see Ischyroceridae, Isaeidae, Aoridae, 

 Corophiidae, Cheluridae];/, telson. 



Podoceridae have elongate urosomite 1. See text for Jassa (p. 279), the ischyrocerid often 



confused with ampithoids. 



