322 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 57. 



This very remarkable species has the genital sinuses reticulate, rather 

 behind the middle of the valve, and occupying for so large a shell 

 relatively small space. The cardinal process is small but very prom- 

 inent. The whole shell is much more solid than most Terebratuloids ; 

 it has a few obsolete radial striae on each side, and a very regular, 

 conspicuous, and close system of punctation. The spiculation is not 

 visible under an ordinary hand lens. All the specimens are of a 

 brownish color. 



Genus DYSCOLIA Fischer and Oehlert. 



Dyscolia Fischer and Oehlert, Journ. de Conchyl., vol. 38, p. 70, 1890; Exp. 

 Sci. du Travailleur et du Talisman, p. 18, Sept. 1891, type, Terebratulina 

 v/y villa Davidson. 



DYSCOLU WYVILLI Davidson. 



Terebratulina wyvilli Davidson, Proc. Roy. Soc, vol. 27, p. 436, 1878. 

 Terebratulina wy villa JiK\iT)SO^, Challenger Brach., p. 32, pi. 1, figs. 1-2, 1880; 



Mon. Rec. Brach., pt. 1, p. 32, pi. 3, figs. 1-3, 1886. 

 Dyscolia wyvillei Fischer and Oehlert, Journ. de Conchyl., vol. 38, p. 70, 1890; 



Bull. Soc. Zool. de France, vol. 4, p. 120, 1890; Exp. Sci. du Travailleur et du 



Talisman, p. 23, fig. 1, pi. 6, figs. 3 a-e, 1891. 

 Terebratula asturiana Fischer, Ms. in Jeffreys Collection. 



Type locality. — -Off Culebra Island, northwest of St. Thomas, West 

 Indies, at station 24 in 390 fathoms sand. 



Genus CHLIDONOPHORA DaU. 



CAZtrfonop^omDALL, Trans. Wagner Inst., vol. 3, p. 1538, 1903, type, Terebratu- 

 lina incerta Davidson. 



CHLIDONOPHORA INCERTA Davidson. 



Megerlia ? incerta Davidson, Proc. Roy. Soc, vol. 27, p. 438, 1878; Challenger 



Brach., p. 49, pi. 11, figs. 17-18, 1880. 

 Terebratulina ? incerta Davidson, Mon. Rec. Brach., pt. 1, p. 38, pi. 6, fige. 23-25, 



1886. 

 Chlidonophora incerta Dall, Trans. Wagner Inst., vol. 3, p. 1538, 1903. 



