134 BULLETIN 104, UNITED STATES NATION AI^ MUSEUM. 



EHRENBERGINA SERRATA Reuss. 



Ehrenbergina serrata Reuss, Denkschr. Akad. Wisffi Wien, vol. 1, 1850, p. 377, 

 pi. 48, fig. 7.— GoiiP, Kongl. Svensk. Vet. Akad. Handl., vol. 25, no. 9, 

 1894, p. 44, pi. 8, figs. 428^30.— CusHMAN, Bull. 100, U. S. Nat. Mus., vol. 

 4, 1921, p. 172. 



Description. — Test subcircular in front view, early portion close- 

 coiled, uncoiling in later growth; chambers numerous, on the dorsal 

 side close fitting, elongate and narrow, on the ventral side with a 

 slight depression on the middle, wall smooth, punctate, the chambers 

 slightly carinate and at the lateral margin extended mto a short 

 spinose angle; aperture elongate, curved, nearly at right angles to 

 the edge of the chamber. 



Length 0.50-0.55 mm. 



Distribution. — This species which Reuss described from the Miocene 

 of Baden in Vienna is apparently the same as that figured by Goes 

 which he found in 400 meters (218 fathoms) off the Azores. I have 

 not seen specimens of this kind either in the Pacific or Atlantic 

 material that I have examined. Although most recent material is 

 referred to this species of Reuss, it has seemed best to indicate at 

 least three distinct species which have occurred in the material 

 that I have been able to examine. 



EHRENBERGINA BRADYI, new species. 



Plate 26, fig. 5. 



Ehrenbergina serrata H. B. Brady (part) (not Reuss), Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, pi. 55, figs. 6, 7 (not 2-5).— Cushman, Bull. 71, U." S. 

 Nat. Mus., pt. 2, 1911, p. 101, figs. 155a-6 [?]. 



Description. — Test triangular, tetrahedral, dorsal side curved, 

 smooth; sutures flush, ventral side with a ventral groove along the 

 middle, the angle of the cliamber at the periphery extended into 

 rounded, long horizontal spines, the ventral borders of the chambers 

 with distinct carinal ridges, wall finely perforate, smooth; aperture 

 elongated, curved, nearly at right angles to the border of the 

 chamber; color whitish. 



Length about 0.50 mm. 



Distribution. — Type-specimen (U.S.N.M. No. 16394) from Tus- 

 carora station 15° 22' 41" N., 171° 33' W., in 1,874 fathoms 

 (3,434 meters). This is the species which Brady figures in the 

 Challenger Report as referred above. Although this seems to be 

 common in the Pacific in deep water, it has not occurred in the 

 Albatross Atlantic material unless a single specimen from station 

 H59 in 789 fathoms (1,442 meters) can be referred to it. This is 

 much more definitely triangular and carinate than the other speci- 

 mens that I have seen from the Atlantic. This is the most ornate 

 species of the genus except for E. hystrix H. B. Brady, which is also 

 known from the Pacific region. 



