308 REPORT OF NATIONAL MUSEUM, 1897. 



extending about half the circumference of the test, joining each other 

 at the extremities ; mouth short, oval, with a contorted internal tubu- 

 lar neck. Diameter, about 0.5 mm. (^ inch). 



Locality. Near Aspinwall (station 2144), 896 fathoms. 



LAGENA ORBIGNYANA Seguenza. 

 (Plate 54, fig. 4.) 



Oval, compressed, the oral end protuberant and tapering; body 

 smooth, the circumference bordered by three parallel wings or keels, 

 the middle one widest. The aperture is at the end of a prolongation of 

 the middle keel only. Diameter, about 0.5 mm. (-^ inch ). 



Localities. Caribbean Sea, Gulf of Mexico (stations 2117, 2144, 2355, 

 2394), 399 to 896 fathoms. 



LAGENA CASTRENSIS Schwager. 

 (Plate 54, fig. 5.) 



Form and general characters the same as L. orUgnyana; distinguished 

 by a surface ornamentation of regular rows of thickly set circular pits 

 covering more or less completely the body and wings of the shell. 



The published descriptions of L. castrensis call for a surface orna- 

 mentation of "exogenous beads," but in the specimens here described 

 the surface is unquestionably pitted. The test is tricarinate and has 

 all the other general characters of L. castrensis. 



Locality. Off Nantucket Shoals (station 2252), 38 fathoms. 



Test polythalamous; straight, arcuate, or planospiral. 

 Genus NODOSARIA. 



Test straight or curved, circular in transverse section; aperture 

 typically central. 



NODOSARIA ROTUNDATA Reuss. 

 (Plate 54, fig. 6.) 



Oval or ovate, smooth, consisting of a few overlapp ng segments; 

 sutures not depressed, indistinct; walls thin and white; aperture com- 

 posed of a large number of radiating fissures, central at the end of the 

 slightly produced terminal segment. Length, about 1 mm. ( 2 \ inch). 



Localities recorded. Five* stations in the North Atlantic (stations 

 2212, 2550, 2571, 2577, 2586), 32 to 1,356 fathoms. 



NODOSARIA L^VIGATA d'Orbigny. 

 (Plate 55, fig. 3.) 



Oval, tapering at both ends, circular in section; surface smooth and 

 polished; sutures indistinct; dis tin gui shed from N.rotundatapx'mcipalli 



