REVISIOX OF RECENT BAIRDnOAE 83 



Bairdoppilata (Bairdoppilata) species 1 



Figure 41t, j 



Material. — Two siibfossil specimens at Albatross station 2808 off 

 the Mississippi Delta. 



Dimensions. — Right valve USXM 121356, length 1.01 mm. height 

 0.67 mm: left valve USNM 121357, length 1.03 mm, height 0.72 mm. 



Affinities. — Shape externally identical to Neonesidea species 2 

 from Nosy Be, Madagascar. The entirely smooth exterior and angulate 

 lateral outline are unlike most other species of Bairdoppilata, to which 

 it cleariv belongs on the basis of hinge dentition. It is much smaller 

 and less caudate than B. (5.?) hirsuta (Brad}') and entirely lacks the 

 marginal fringes of the latter. It is slightly larger than B. (B.) cushmani 

 (Tressler) specimens from Bimini and is completely smooth, yet overall 

 it is very similar to that form and may represent a much abraded, 

 larger variety from deeper water. 



Bairdoppilata {Bairdoppilata) species 2 



Figure 41d-/i 



Material. — A single adult male uith dried appendages collected 

 at Anton Bruun 412L. 



Dimensions.— Adult male USXM 121358. left valve, length 1.21 

 mm. height 0.77 mm: right valve, length 1.24 mm, height 0.62 mm. 



Affinities. — Despite the similarity in carapace outlines and the 

 proximity of this station to Nosy Be, Madagascar, this form cannot 

 be identified ^nth B. (B.) alcyonicola, new species. The carapace is 

 much larger and is distinguished by exceedingly numerous very fine 

 radial pore canals, smooth surface ^vith very tiny punctae, and an 

 extremely fine internal reticular mosaic structure in transmitted 

 light. The copulatory organ is of quite different structure, having only 

 a very short and stout copulatory tube. 



Bairdoppilata {Bairdoppilata!) species 3 



Figure 27e-A 



Material. — Subfossil specimens, 43 from Anton Bruun stations 

 361G, 363B. E, G. 



Dimensions. — Specimens from Anton Bruun station 36 G: right 

 valve USXM 121359, length 1.48 mm, height 0.94 mm; right valve 

 USXM 121360. length 1.50 mm, height 0.92 mm; left valve USXM 

 121361, length 1.43 mm, height 1.00 mm: left valve USXM 121362, 

 length 1.44 mm, height 0.96 mm. 



Distribution. — Southern Mozambique Channel, depth 1860- 

 2980 m. 



