GAMMARIDEAN AMPHIPODA 159 



show its flattened molar with one spine and remnants of tritnrating 

 cylinder; lower lip, although damaged, bearing inner lobes. 



Male. — Station 7229, 3.4 nnn long; differing from female by shorter 

 article 2 of first antennal peduncle but article 2 bearing similar dorso- 

 distal process; flagellar base formed of coalesced articles bearing sen- 

 sory setae; accessory flagellum 3-articulate; dorsomedial teeth of pleo- 

 nites 1-3 much smaller than in female and nearly obsolete; pleonites 4 

 and 5 dorsally elevated, tooth of pleonite 4 obsolete, tooth of pleonite 5 

 ehmgate, acute, pleonite 6 with erect, spinose process; telson in good 

 condition, with deeper cleft than observed on damaged female. Pere- 

 opod 5 missing. 



HoLOTYrE. — AHF No. 6117, female, 3.5 mm. 



Type-locality.— Station 7234, 27°38'00" N, 115°16'16" W, 791-842 

 m, Jan. 2, 1901. 



Material. — The holotype and the male from station 7229. 



Eelationship. — This species closely resembles Aiistrosyrihoe iJer- 

 getes J. L. Barnard (1964b) but differs, as it does from all other aus- 

 trosyrrhoes, by the occurrence of a large process on article 2 of antenna 

 1. It shares with .4. llergete^ the slightly inflated sixth articles of 

 pereopods 1 and 2 but its pleonal epimeron 3 is not bidentate at the 

 posteroventral corner, its coxa 3 has a narrower posterior lobe, the 

 uropods are veiy different and gnathopod 1 is much stouter. The 

 first gnathopod is similar to that of ^4. septenfrionaJls Stephensen 

 (1931) but the telson of the latter is broad and deeply cleft, article 6 

 of gnathopod 1 is much stouter, has a distinctly transverse palm, and 

 uropods 1 and 2 have long apical spines on the rami. Coxa 3 of A. 

 septentr'tonali-s is narrower than that of ^4. pi-isc/s. The mouthparts 

 of A. septentrionalh have not definitely been shown to be those of an 

 Austj'osyn^hoe. 



Austrosyrrhoe prisc/s differs from ^4. fmhrlatus (Stebbing and 

 Robertson, 1891) in the poorly cleft telson, the simple rami of uropods 

 1 and 2, the stouter gnathopods, the first antennal process and the con- 

 dition of pereopods 1 and 2. 



The outer rami of uropod 3 of all species of AiiMrosyrrhoe (except 

 that to follow) are biarticulate; the joint of the second article in A. 

 priscls is very difficult to detect because it has no defining spines. Aus- 

 trosyrrhoe ilergetes is remarkable in that it appears to have second 

 articles on the inner rami of uropods 1 and 2. 



The obsolescence of dorsal teeth on male pleonites 1-3 is reminiscent 

 of the condition in A. torpeiis J. L. Barnard (see 1962a, 1964b) and 

 suggests the possibility that A. ilergetes J. L. Barnard (1946b) is the 



242-332 — 67 12 



