MARINE GAMMARIDEAN AMPHIPODA 



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Figure 36. — Paramphithoidae: (incl. Amathillopsidae) : a, coxae 1-4, left to right, note 

 acumination [see Pleustidae, Eusiridae, Calliopiidae]; i, extremes of accessory flagellum; 

 c, gnathopod 2, note feeble condition; d,e, extremes of telson. 

 Acanthonotozomatidae lack a distinct mandibular molar and have their mouthparts ar- 

 ranged in a conical bundle. Lepechinellldae have pleonites 5-6 amalgamated, extremely 

 slender second articles of pereopods 3-5 and coalesced inner lobes of the lower lip. Haustori- 

 idae have multiarticulate accessory flagella and strongly spinose pereopods. 

 Astyridae have nontrlturative mandibular molars and widely separate outer lobes of the 

 lower lip. Two genera of Paramphithoidae have nontrlturative molars and may be examined 

 in the key to the genera of Astyridae. 



