166 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



form test with numerous, rather low, rounded costae, closely con- 

 forming to the contour of the chamber, the later chambers roughened 

 but without costae. The types were fossils from the region of 

 Sienna, Italy. 



Except for the species here named XJ . yeit'egrina^ costate Uvigerinae 

 from the Western Atlantic are very rare. I have scattered specimens 

 from a few stations, none of which can be specifically identical with 

 that of D'Orbign}^ After reviewing specimens of costate forms 

 from various parts of the present ocean and from the Tertiary, I am 

 convinced that there are several distinct forms with definite distribu- 

 tions that have all been included at various times under this name of 

 D'Orbigny. 



UVIGERINA PEREGRINA. new »pecie8. 



Plate 42, figs. 7-10. 



Uvigerina pygmaea Flint (not U. pigmea D'Orbigny), Rep. U. S. Nat. 

 Mus., 1897 (1899), p. 320, pi. 68, fig. 2. 



Description. — Test elongate, about 2^ times as long as broad, 

 widest in the middle, ends rounded; chambers fairly numerous, in- 

 flated, distinct; sutures depressed but the line of the suture in- 

 distinct; wall ornamented with longitudinal costae, about 10 on a 

 full-grown chamber, those of each chamber usually not continuous 

 with those of adjacent chambers, high and very thin and sharp, to- 

 ward the base and apertural ends of the test becoming broken up 

 into spinose or irregular short portions ; the wall between the costae 

 and the costae themselves distinctly granular; aperture circular at 

 the end of a distinct cylindrical neck, often spinose and with a 

 phialine lip. 



Length up to 0.85 mm. 



Distribution. — Type-specimen (U.S.N.M. Cat. No. 17574) from 

 Albatross station D2029, in 1,168 fathoms (2,136 meters), off the 

 northeastern coast of the United States. This is a very common 

 species in the cool waters of moderate depths off the northeastern 

 coast of the United States, and at a very few stations just south of 

 Cape Hatteras. It occurs in great numbers, making up a decidedly 

 important proportion of the bottom material. 



It is very different from typical U. pigmea D'Orbigny, as a refer- 

 ence to D'Orbigny's figure and model will show. Our species may 

 be distinguished by the high plate-like costae, the very granular sur- 

 face, even of- the costao, spinose or broken plates at the apertural 

 and initial ends, and the often spinose neck. It is represented fur- 

 ther southward by the following variety. 



