314 REPORT OF NATIONAL MUSEUM, 1897. 



MARGINULINA ENSIS Reuss. 

 (Plate 59, fig. 3.) 



Elongate, subcylindrical, early segments moderately compressed, the 

 first fonr or five curved so as to form about half a convolution; later 

 segments inflated, arranged in a nearly straight line, with slightly 

 oblique, depressed sutures; surface smooth; walls thin and rather 

 fragile; aperture marginal, tubular, round, with radiating fissures. 

 Length, 2.5 to 4 mm. {^^ to ^ inch). 



Locality.— North Atlantic (stations 2242, 2343, 2614), 58 to 168 fathoms. 



Genus VAGINULINA. 



Test elongate, compressed or complanate; septation oblique; aperture 

 marginal. 



VAGINULINA SPINIGERA Brady. 



(Plate 60, lig. 3.) 



Elongate, compressed, tapering, smooth, bearing at the initial end 

 two or more long stout spines. The earliest two or three segments are 

 spirally arranged; subsequently they are in linear series, with more or 

 less oblique sutural lines. Length of body, 3 mm. (J inch), more or less. 



Locality.— North Atlantic (stations 2263, 2586), 430 and 328 fathoms. 



VAGINULINA LEGUMEN Linnaeus. 

 (Plate 60, fig. 2.) 



Elongate, slightly compressed, smooth, of nearly uniform diameter; 

 initial end terminating in a stout marginal spine; oral extremity taper- 

 ing toward the margin opposite the initial spine; sutures distinct, 

 oblique, not depressed; no surface ornamentation. Length, about 

 4 mm. (^ inch). 



Locality. — Gulf of Mexico (station 2395), 347 fathoms. 



VAGINULINA LINEARIS Montagu. 

 (Plate 61, lig. 1.) 



Elongate, slightly compressed, of nearly uniform diameter, straight 

 or a little curved; segments numerous, the first three or four irregular, 

 the remainder in linear series with the sutures more or less oblique; 

 surface ornamented with many longitudinal or very slightly diagonal 

 ribs. Length, about 2.5 mm. {^ inch). 



Localities. — Off" coast of Georgia and Florida (stations 2315, 2416, 

 2641), 37 to 276 fathoms. 



Genus CRISTELLARIA. 



Test i)lanospiral in part or entirely; complanate, lenticular, crosier- 

 shaped, or eusiform. 



