DESCRIPTIVE CATALOGUE OF RECENT FORAMINIFEKA. 275 



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

 (J-o- 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 lit, 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, 2508, 2570, 2079), 18 to 1,700 fathoms. 



HAPLOPHRAGMIUM CALCAREUM Brady. 

 (Plate 19, lis. 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. (3V to iV inch). 



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

 2584), 843 and 511 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 



