66 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



It occurred also at Nero station 1254, in 264 fathoms, near the Bonin 

 Islands in the western Pacific. 



This species may be the same as that from the Atlantic referred by 

 various authors to G. rugosa d'Orbigny. A glance at the original 

 figure given by d'Orbigny, however, shows the great difference 

 between this recent species and d'Orbigny' s cretaceous fossil species. 

 In true G. rugosa, according to d'Orbigny's figure and description, 

 the triangular portion is the smaller part, and the biserial portion 

 the greater, the whole appearance of the test being very different. 

 Here the triserial condition is maintained well toward the end of the 

 test, where the biserial condition is taken on. Our recent species 

 seems to me to have little in common with the cretaceous species. 



GAUDRYINA CONVEXA, new species. 



Description. — Test triangular in front view, broad at the apertural 

 and rather rapidly tapering to the initial end, one face nearly 

 flat, the other strongly convex and with deeper sutures; apertural 



Fig. 105.— Gaudryina convexa. X 60. a, end view; b, dorsal view; c , ventral view. 



end obliquely truncate, in end view roughly semicircular; wall rather 

 coarsely arenaceous; aperture elongate, between the inner border of 

 the chamber and the adjacent wall of the preceding chamber, in a 

 distinct depression of the inner border of the chamber; color gray. 



Length 0.60 mm. 



Distribution. — Type from Albatross station D4878, in 59 fathoms, 

 eastern channel of the Korean Strait (Cat, No. 8343, U.S.N.M.). 



This species suggests somewhat G. wrightiana Millett, but both 

 faces in our species in the biserial portion are convex, one of them, 

 however, only slightly so. It also somewhat resembles G. jonesiana 

 Wright. 



GAUDRYINA PAUPERCULA, new species. 



Description. — Test short and broad, abruptly tapering to the 

 broadly rounded initial end, the early portion triserial, the last 

 developed chambers biserial; chambers inflated; sutures dis- 

 tinct; end view broadly rounded; walls arenaceous, but with a 



