DESCRIPTIVE CATALOGUE OF RECENT FORAMINIFERA. 303 



PLANISPIRINA CELATA Costa. 

 (Plate 47, 6g.5.) 



Contour long oval with projecting ends, somewhat compressed, the 

 two sides unequally convex, the margins thick and rounded; surface 

 rough, and texture sandy; aperture small and arched. Length, about 

 1.25 mm. (-^ inch). Transverse section shows the arrangement of 

 chambers to be the same as in the last described species. 



Localities. — The vicinity of Aspinwall, west coast of Cuba, coast of 

 Brazil, and coast of Oregon (stations 2144, 2352, 27G0, 3080), 100 to 

 1,000 fathoms. 



Subfamily PElSTEROPLIIDIlSrjE;. 



Test planospiral or cyclical, sometimes crozier- shaped, bilaterally 

 symmetrical. 



Genus CORNUSPIRA. 



CORNUSPIRA FOLIACEA Philippi. 

 (Plate 48, fig. 1.) 



A very thin, flat shell, consisting of a tube without partitions or con- 

 strictions, miuutely narrow at first, but gradually and rather rapidly 

 becoming larger and more compressed, the tube evenly coiled upon 

 itself in a perfectly Hat spiral; surface wrinkled transversely; aperture 

 a long narrow slit formed by the abrupt termination of the flattened 

 tube. 



Localities. — Gulf of Mexico, and ofl" Marthas Vineyard (stations 2352, 

 2377, 2383, 2550), 210 to 1,180 fathoms. 



CORNUSPIRA INVOLVENS Reuss. 

 (Plate 48, fiff. 3.) 



A simple coiled tube, minute in the earlier convolutions, growing 

 larger and stouter in the later turns without becoming flattened as in 

 G. foliacea just described. Diameter, 0.G25 to 1.5 mm. (^ to ^ inch). 



Localities. — Caribbean Sea, Straits of Yucatan, and coast of Georgia 

 (stations 2150, 2352, 2410), 276 to 4G3 fathoms. 



CORNUSPIRA CARINATA Costa, species. 



(Plate 48, fig. 2.) 



A simple planospiral coil, intermediate in form between G. foliacea 

 and C. involvens. The tube increases gradually in size and its outer 

 margin is marked by a narrow keel. Diameter, about 1.5 mm. (^ inch.) 



Locality. — Gulf of Mexico (station 2394), 420 fathoms. 



Genus PENEROPLIS. 



Chambers undivided; arrangement either planospiral throughout or 

 spiral only at the commencement, subsecpiently becoming rectilinear 

 or cyclical. 



