FORAMINIFERA OF THE ATLANTIC OCEAN. 83 



CLAVULINA HUMILIS H. B. Brady, var. MEXICANA. new variety. 



Plate 16, figs. 1-3. 



Clavulina parisiensis d'Orbigny, var. humilis Flint (not H. B. Brady), Rep. 

 U. S. Nat. Mu3., 1897 (1899), p. 289, pi. 36, fig. 1. 



Description.-— Test elongate, early portion sharply triangular, with 

 a subacute apical end, later portion subcylindrical, slightly tapering; 

 chambers of the early portion becoming somewhat more separate 

 and distinct as added, those of the last-formed portion flask-shaped 

 with a definite neck; sutures indistinct in the triscrial portion, those 

 of the later portion becoming somewhat more distinct and depressed, 

 wall coarsely arenaceous, the surface roughened, fairly thick; aper- 

 ture terminal, central, at the end of the tubular neck; color light 

 gray. 



Length up to 0.6 mm. 



Distribution. — Type-specimen (U.S.N.M. No. 16653) from Albatross 

 station D2377, 210 fathoms (384 meters), in the Gulf of Mexico. It 

 is also found at numerous other stations, mostly in the Gulf of Mexico, 

 but one off the coast of South Carolina, and another north of Panama. 

 Flint had this variety from the northern part of the Gulf of Mexico, 

 and from a single station off the coast of Brazil. D'Orbigny de- 

 scribed C. parisiensis from the Eocene of the Paris Basin. His 

 Modele No. 66 shows a specimen with the early portion strongly tri- 

 angular, the faces flat, and larger than the immediately succeeding 

 portion, which is subcylindrical and slightly tapering, the chambers 

 well marked, gradually enlarging as they are added. Such speci- 

 mens as I have at hand from the Paris Basin and the Eocene of Grig- 

 non, and elsewhere, show a very similar form to that of d'Orbigny's 

 Modeles. They are comparatively small and have a smooth, even 

 surface. Such specimens are recorded as common in the Eocene of 

 the London Clay. The figures of recent material assigned to C. 

 parisiensis do not meet this requirement and seem to be a different 

 species. For some reason the rough surface seems to have been 

 taken as a characteristic which evidently it does not have in the fossil 

 C. parisiensis. Brady describes the variety Jiumilis from off the 

 Philippines from specimens which are small, less than 1 mm. in length, 

 and have the last-formed chambers more or less globular and distinct. 

 Flint used this name for specimens which he figures from the Gulf 

 of Mexico under this name in the reference given above. They are 

 very much larger than Brady's Philippine specimens and they would 

 seem to be distinct from those. C. parisiensis d'Orbigny can not be 

 used for the recent material of this sort; the first available name is 

 that of Brady, and it is here used for the variety he described from 

 the Philippines. The material from the Gulf of Mexico and adjacent 

 regions is clearly related to the Philippine form and seems to be dis- 

 tinct at least varietally. Much of the rough material which has been 



