NO. 5 BARNARD: AMPHIPODA 57 



14. Antennae 1 and 2 subequal in length 20 



15. Article 2 of first antenna 1.5 times as long as article 



1 or less 16 



15. Article 2 of first antenna twice as long as 



article 1 or longer 17 



16. Ventral and anterior margins of head blending 



evenly crenulata [and daleyi (of Giles, 1890)^] 



16. Ventral margin of head sharply set off from anterior 

 [these two species are separated by the shape of 

 article 2 of pereopod 5 which should be examined 



in the original] affinis and rhinoceros 



17. Article 5 of pereopod 5 scarcely longer than article 6 18 



17. Article 5 of pereopod 5 one and seven-tenths times 



as long as article 6 kallarthra 



18. Article 2 of antenna 1 nearly half as long as 



article 4 of antenna 2 19 



18. Article 2 of antenna 1 one-fourth as long as article 



4 of antenna 2 serrata 



19. Article 4 of antenna 2 longer than peduncle of 



antenna 1 veleronis (in part) 



19. Article 4 of antenna 2 shorter than peduncle of 



antenna 1 affinis (in part) 



20. Pereopod 4 with acute cusp on ventral edge of 



article 2 mucronata 



20. Pereopod 4 lacking acute cusp on article 2 21 



21. Corneal lenses very small erythrops 



21. Corneal lenses large 22 



22. Anteroventral corner of head rounded, corneal lenses 



occupying corner veleronis (in part) 



22. Anteroventral corner of head sharp, corneal lenses 



posterior to corner bathyalis and Ijaponica 



Byblis barbarensis J. L. Barnard 



Byblis barbarensis J. L. Barnard, 1960a: 34, fig. 11 (in part, see B. 



tannerensis) . 



Canyon material: 6808(1), 6812(1), 6820(2), 6831(3), 6837(1), 

 7047(4), 7051(1). 



Basin material .'3731(2). 



2.?B. daleyi Giles of Pirlot (1936) has article 3 of antenna 1 nearly three 

 times as long as article 1 and therefore differs from Giles' account. 



