58 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



Byblis bathyalis, new species 



(Figs. 3, 4) 

 Diagnosis: Antenna 1 nearly as long as antenna 2; antenna 2 

 nearly as long as body ; corneal lenses large, lower pair occupying ven- 

 tral margin of head posterior to sharp anteroventral cephalic cusp ; per- 

 eopod 2 not elongated and enlarged like Byblis lepta (Giles) ; pereopod 



4 lacking acute cusp on article 2 ; article 7 of pereopod 5 more than half 

 as long as article 6 ; facing edges of rami of uropod 3 serrate ; telson cleft 

 almost halfway. 



Holotype: AHF No. 609, female, 9.7 mm. 



Type locality: Station 6836, Tanner Canyon, California, 32°-36'- 

 00"N, 119°-05'-18"W, 496 m, January 29, 1960. 



Canyon material: The 17 specimens of type material and two speci- 

 mens from station 6838. The latter specimens have article 7 of pereopod 



5 almost as long as article 6 and the rami of uropod 3 are considerably 

 less serrate than in the type-series. 



Relationship: This species differs from Byblis veleronis J. L. Bar- 

 nard (1954b) in the shape of the head, the ventrolateral corner being 

 pointed and the lower lens not occupying that corner, whereas in B. 

 veleronis the rounded anteroventral corner of the head is occupied 

 by the lower lens. Byblis affinis Sars differs from this species in the 

 shorter cleft of the telson and the shorter first antenna. The material 

 attributed to Byblis daleyi (Giles) by Pirlot (1936) is very similar 

 but the anteroventral cephalic corner is rounded and the telson is less 

 deeply cleft. 



The identification of this material with Byblis japonica Dahl 

 (1944) is problematical, for several points in that description are not 

 sufficiently detailed to permit perfect relationship. The exact condition 

 of the anteroventral corner of the head is not clear, the third uropod is 

 drawn from a lateral, not a dorsal view; but the third pleonal epim- 

 eron of the present species is much more broadly lobed posteriorly 

 than in B. japonica and the seventh article of pereopod 5 is longer. 



The very strong serrations on the rami of uropod 3 distinguish this 

 species from B. erythrops Sars (see 1895) and B. crassicornis Metzger 

 (see Sars, 1895) ; the large cuticular lenses differ from the small 

 ones of B. erythrops ; B. crassicornis lacks lenses. 



Byblis tannerensis, new species 



(Figs. 5, 6) 

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

 5935). 



