GAMMARIDEAN AMPHIPODA 157 



The illustrated male of this snlispecies (male iindescribed for typi- 

 cal subspecies) differs from the female by the slio;htly shorter and 

 stouter peduncular articles of antenna 1, the elongfated article 2 of the 

 accessory flagellum, and the basally coalesced articles of the primary 

 flagellum armed with sensory setae. Configurations of the expanded 

 lobe of article 2 on pereopod 5 difl'er among male and female of the 

 subspecies at hand and the female of the typical subspecies as shown 

 in the various figures. 



The outer rami of uropod 3 of A. i inconj^taju have distinctly articu- 

 lated terminal portions, a condition suggested for the typical sub- 

 species by the spined distal notches. 



A second, unfigured male from 7229 is dubiously assigned to this 

 subspecies; its pleonal epimeron 3 lacks any posteroventral sinus and 

 accessory tooth. 



Austrosyrrhoe priscis, new species 



Figures .52 i-k, 78 



Diagnosis of female. — Rostrum thick, deflexed; lateral cephalic 

 lobes anteriorly truncate and not delineated from remainder of head; 

 antennae of medium length, article 2 longer than article 1 and pro- 

 duced anterodistally into a long cusp guarding article 3, article 3 

 shorter than article 1, article 1 with dorso- and ventrodistal processes, 

 accessory flagellum biarticulate, article 2 minute; coxa 3 with pointed 

 and produced anteroventral corner, posterior edge broadly excavate, 

 slightly lobate at posteroventral corner, coxa 4 of medium size for 

 genus, slightly expanded distally, poorly excavate posteriorly; 

 gnathopod 1 stout, article 5 of gnathopod 2 not strongly elongated, 

 palms of gnathopods 1 and 2 defined by one stout, serrate spine, arti- 

 cle 6 of gnathopod 1 relatively slender (in comparison to A. scpten- 

 trlonnUs Stephensen, 1931) ; article 6 of pereopods 1 and 2 slightly 

 inflated, strongly setose posteriorly; article 2 of pereopod 5 relatively 

 slender in comparison to other species of genus; pleonites 1-4 each 

 with small dorsoposterior tooth, segment 5 with long, slender tooth; 

 pleonal epimeron 1 with slightly produced posteroventral corner, 

 epimeron 2 with distinct, blunt posteroventral tooth, 3 with small 

 posteroventral hook; rami of uropods 1 and 2 simple apically, rami 

 of uropod 3 interequal in length, outer ramus uniarticulate; uropodal 

 peduncular processes when present small; telson elongate, badly 

 damaged, with evidence of minute cleft. 



Remarks. — Mouthparts agreeing generally with those of Austro- 

 syrrhoe ilergetes J. L. Barnard (19G4b) but mandible illustrated to 



