DESCRIPTIVE CATALOGUE OF RECENT FORAMINIFERA. 275 



flat septal plates. Length, about 2.5 mm. (-f - inch) ; diameter, 0.4 mm. 

 (eV inch). 



Locality. A. single specimen obtained about 200 miles southeast of 

 Marthas Vineyard (station 2568), 1,781 fathoms. 



Genus HAPLOPHRAGMIUM. 



Test free; partially or entirely spiral; nautiloid or crosier shaped; 

 chambers numerous, not labyrinthic. 



HAPLOPHRAGMIUM AGGLUTINANS d'Orbigny. 

 (Plate 19, fig. 2.) 



Commences as a small, flat spiral of little more than a single con- 

 volution ; continues as a straight series of cylindrical segments, grad- 

 ually increasing in size; walls constructed of more or less coarse sand; 

 surface rough, sutural lines indistinct; aperture central at the end of 

 the final segment. Section shows form and arrangement of chambers. 



Localities. North Atlantic and Gulf of Mexico (stations 2041, 2115, 

 2385, 2374, 2568, 2576, 2679), 18 to 1,700 fathoms. 



HAPLOPHRAGMIUM CALCAREUM Brady. 

 (Plate 19, fig. 1.) 



A large, coarse, compressed, falciform shell, with a short spiral por- 

 tion and a more or less extended straight part, composed of two to six 

 well defined, broad segments; walls constructed of rather coarse coral 

 sand neatly joined and firmly cemented; aperture simple, terminal. 

 Length, about 3 mm. ( inch). 



Locality. Arrowsmith Bank, Straits of Yucatan (station 2355), 399 

 fathoms. 



HAPLOPHRAGMIUM TENUIMARGO Brady. 

 (Plate 19, fig. 3.) 



Test small, much compressed, the edges thin and jagged; segmenta- 

 tion obscure, early arrangement spiral, later rectilinear; walls of coarse 

 sand; surface rough; aperture simple, terminal. Length, 0.75 to 1.5 

 mm. (3*2 to -fV inch). 



Localities. Off Cape Hatteras and off Block Island (stations 2115, 

 2584), 843 and 541 fathoms. 



HAPLOPHRAGMIUM CASSIS Parker. 



(Plate 19, fig. 4.) 



Small, compressed, somewhat sigmoidal in outline, the edges rounded; 

 segmentation obscure, early arrangement spiral, later arrangement 

 linear, but the segments becoming broader and more and more diag- 

 onally placed; walls of coarse sand, but the surface comparatively 



