18 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



Discorbis berlheloH, var floridensis — Material examined — Continued 



Diameter up to slightly more than 1 mm, 



Holotype of variety (Cushman Coll. No. 12889) from 28 fathoms off 

 Fowey Light, Fla. The species is a common one along the Florida 

 coast and is probably widely distributed in the general West Indian 

 region. 



This variety is close to that referred by various authors to Discorbis 

 berthelotiana (d'Orbigny), var. baconica (Hantken). Hantken's 

 species from the Clavulina Szaboi beds of Hungary is not the same as 

 this, as a comparison of the original figure and topotype material 

 shows. 



Our variety is an attached form, and numerous attached specimens 

 are in our collection. 



Egger records ^'Discorbina baconica Hantken" from off West 

 Africa. 



Flint's specimens from oft* Florida referred to '^Discorbina globu- 

 laris " '^ belong here. 



DISCORBIS BICONCAVA (Parker and Jones) 



This is an Indo-Pacific, almost Australian species. In the Chal- 

 lenger report (p. 653) Brady mentions that Siddall has very small 

 specimens from the Estuary of the Dee that seem to belong here. 

 Just what these are can not be determined without seeing the original 

 specimens. Siddall later recorded these. ^^ Flint records this same 

 species,^* but this is a West Indian Planulina that is taken up under 

 that genus. 



It should be noted that there are probably two distinct forms figured 

 by Brady, and that one of them at least should be included under 

 Planulina. 



» Ann. Rept. U. S. Nat. Mus., 1897 (1899), p. 327, pi. 72, fig. 2. 



" Proc. Lit. Philos. Soc. Liverpool, 1886, p. 70 (list). 



'« Rept. U. S. Nat. Mus., 1897 (1899), p. 327, pi. 72, fig. 5. 



