REVISION OF RECENT BAIRDIIDAE 99 



Adult female USNM 121396, left valve, length 1.60 mm, height 

 0.92 mm; right valve, length 1.53 mm, height 0.89 mm. 

 Material. — Specimens, 34 living at Eltanin station 1248. 



Bythocypris mozambiquensis, new species 



Figures 46e-o, 52, 53 



Etymology. — From the Mozambique Channel, where the species is 

 known to live. 



Type-specimens.— Holotype USNM 121600; paratypes 121601- 

 121616. 



Type-locality. — Anton Bruun cruise 7 station 361 G. 



Diagnosis. — Carapace quite robust, left valve rather higher than 

 left and of different lateral outline, with broadly arched dorsum and 

 nearly triangular outline overall, lacking concave segments; right 

 valve with more sinuous outline, \\dth straight dorsomedian and 

 concave anterodorsal and posterodorsal segments and distinctly cau- 

 date posteroventral area. Fused marginal zone rather broad with 

 straight radial pore canals. 



Material. — Of the typical form, 77 subfossil specimens collected 

 at Anton Bruun stations 360B, 361G, 363B, D, K, 366C, 367A, G, 

 368C, 369D, G, J. 



Of variant A, 2 living females (?) at Anton Bruun stations 368C 

 and 416A; probably some subfossil specimens included in the counts 

 for the typical form. 



Of variant B, 11 subfossil specimens from Albatross stations 4693 

 and 2385. 



Of variant C, 5 subfossil specimens at Anton Bruun station 410A; 

 one living female at Anton Bruun station 363D. 



Of variant D, 4 subfossil specimens at Anton Bruun station 361 G. 



Of variant E, 2 subfossil specimens at Albatross station 4728. 



Of variant F, 4 subfossil specimens at Albatross station 4723. 



Dimensions. — For the typical form; specimens from Anton Bruun 

 station 36lG: Left valve USNM 121601, length 1.00 mm, height 

 0.52 mm; left valve USNM 121600, length 1.49 mm, height 0.83 mm; 

 right valve USNM 121602, length 1.42 mm, height 0.75 mm; right 

 valve USNM 121603, length 1.50 mm, height 0.70 mm. 



Variant A: Adult female (?) USNM 121605, left valve, length 

 1.22 mm, height 0.68 mm; right valve, length 1.24 mm, height 0.62 

 mm. USNM 121606, right valve, length 1.23 mm, height 0.61 mm. 



Variant B: Adult right valve USNM 121607, length 1.47 mm, 

 height 0.69 mm. Juvenile right valve USNM 121608, length 0.95 mm, 

 height 0.47. Juvenile left valve USNM 121609, length 1.00 mm, 

 height 0.52 mm. 



