92 U.S. NATIONAL MUSEUM BULLETIN 29 5 



Diagnosis.— Height/length ratio=0.56, length about 1.03 mm,, 

 carapace outline oblong with nearly straight dorsal margins. 



Material.— Subfossil specimens, 130 from Albatross stations; 

 2763, 2751, 2383, 2385, 2392, 3375. 



Dimensions.— USNM 121380 horn Albatross 3375, left valve, length 

 1.03 mm, height 0.58 mm; right valve, length 1.00 mm, height 0.53 

 mm. 



Distribution.— North Atlantic; south of Rio de Janeiro, east 

 Caribbean Basin, and Mississippi Delta; depths from 1227 to 2160 m. 



Remarks.— Described from a single specimen collected at 1918 m 

 depth by the Talisman, July 7, 1883, in the North Atlantic off North 

 Africa (Brady 1886). 



Bythocypris affinis madagascarensis, new subspecies 



Figure 45e, / 



Type-specimens.— Holotype USNM 121382; paratypes USNM 

 121381, 121383. 



TYPE-LOCALiTY.^^nfon Bruun cruise 7 station 373J. 



Diagnosis.— Height/length ratio-0.60 mm, length about 0.93 mm, 

 dorsal margin of left valve gently but distinctly arched. 



Material.— Subfossil specimens, 24 from Anton Bruun stations 

 363K, 365D, 369J, 370B, 373J, 399, 407. 



Dimensions.— Right valve USNM 121381 from Anton Bruun 373J, 

 length 0.92 mm, height 0.50 mm. Left valve USNM 121382 from same 

 station, length 0.93 mm, height 0.56 mm. 



Distribution.— Mozambique Channel between Tulear and Lour- 

 engo Marques, at depths between 880 and 1190 m. 



Affinities.— Specimens deviating somewhat from the general form 

 of this population are assigned below to 'Variant" A and B. 



Variant A 



Figure 45gr 



Material.— Two specimens from Anton Bruun station 369 G in the 

 Mozambique Channel at 1205 m. depth. 



Dimensions.— USNM 121384, left valve, length 1.04 mm, height 

 0.63 mm. 



Affinities.— These specimens are larger and dorsally more rounded 

 than the general population of this subspecies. 



Variant B 



Figure 45A, i 



Material.— Ten specimens from Anton Bruun stations 363B and 

 368C in the Mozambique Channel at depths of 2980 and 2995 m. 



