DESCRIPTIVE CATALOGUE OP RECENT PORAMINIFERA. 297 



Localities. — Atlantic Coast of the Southeru United States, and the 

 Gnlf of Mexico (stations 2312, 2313, 2358, 2^20, 2614, 2041, 2400), 00 to 

 220 fathoms. 



SPIROLOCULINA PLANULATA Lamarck. 

 (Plate42, lig.4.) 



Compressed, broad oval to nearly circular; border rectangular or 

 slightly rounded; segments not inflated, sutures rather indistinct; 

 texture comparatively coarse. Diameter, about 1.25 mm. (aV inch). 



SPIROLOCULINA ARENARIA Brady. 



(Plate 43, lig. 1.) 



Oval, much compressed, peripheral edge rounded, surface sandy and 

 rough; sutural lines wholly obscured; aperture small, round, with a 

 minute T-shaped tongue. Length, 0.75 mm. (gV inch). 



Locality. — Oft' Carysfort Light, Florida (station 2641), 60 fathoms. 



Genus MILIOLINA. 



Chambers inequilateral, coiled around the long axis of the shell in 

 such a way that more than two (usually three or five) are visible 

 externally. 



MILIOLINA SEMINULUM Linneeus. 



(Plate 43, lig. 2.) 



Contour as seen from above oval, from the end or side triangular, 

 with rounded angles; surface smooth, with the clear white luster of 

 porcelain characteristic of the Miliolida\ Segments somewhat inflated, 

 usually four of them partially visible on one side and three on the 

 other; aperture round or oval, with a conspicuous appendicular tooth. 

 Length, about 1.25 mm. {-J-^- inch). The species is common in every 

 latitude and at all depths. 



Localities. — Specimens collected in the Gulf of Mexico,North Atlantic, 

 and off coast of Brazil (stations 2570, 2508, 2754, 2383, 2392, 2700j, 725 

 to 1,800 fathoms. 



MILIOLINA GRACILIS d'Orbigny. 



(Plate 43, i'l'j;. 5.) 



Very small, long oval; segments nearly cylindrical, three of them 

 visible on one face, and two on the other; aperture large with slightly 

 protuberant lips. Length, about 0.5 mm. {^^ inch). 



Localities. — Cozumel Island, and off Carysfort Light, Florida (stations 

 2358, 2641), 222 and 00 fathoms. 



MILIOLINA OBLONGA Montagu. 



(Plate 13, lig. 3.) 



Small, long oval in contour; otherwise like M. semimilum. Length, 

 about 0.4 mm. (,fo inch). 



Localities. — From vicinity of the island of Trinidad and off coast of 

 Brazil (stations 2754, 2760), 880 to 1,000 fathoms. 



