FORAMINIFERA OF THE ATLANTIC OCEAN. 133 



ward, at least to the Galapagos, and thence to the Bering Sea. It 

 has been recorded by Chapman from the Arabian Sea and off Aus- 

 tralia and the Antarctic. The only Atlantic record is that of Pearcey, 

 who records two specimens from Scotia station 346 in 56 fathoms 

 (102 meters), Biirdwood Bank, south of the Falkland Islands. Appa- 

 rently it does not come into the North Atlantic in so far as the 

 records or dredgings show. 



Genus EHRENBERGINA Reuss, 1850. 



Ehrenhergiiia Reuss (type, E. serrata Reuss), Denkschr. Akad. Wiss. Wien, 

 vol. 1, 1850, p. 377. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 433.— Chapman, The Foraminifera, 1902, p. 179.-Cushman, Bull. 

 71, U. S. Nat Mus., pt. 2, 1911, p. 101. 



Cassidulina (part) d'Orbigny, Foram. Amer. M-Srid., 1839, p. 57. 



Description.— Test free, early portion coiled, later portion uncoiled, 

 composed of numerous chambers arratiged biserially about an 

 elongate axis, evenly united on the dorsal side but forming a deep 

 groove on the ventral border, generally triangular in cross section; 

 wall calcareous, perforate, smooth, or ornamented with spines or 

 ridges; aperture elongate, curved, nearly at right angles to the edge 

 of the chamber, with a slight lip. 



The type species of the genus was described by Reuss from the 

 Miocene of Baden, near Vienna. According to Chapman the records 

 of the genus go back to the Lower Cretaceous. In the recent oceans 

 the genus is represented by the following species with apparently 

 definite distribution. 



It seems very questionable whether any of the recent species can 

 be referred to Reuss's fossil species, although this was done by 

 Brady in the Challenger Report, and he has since been followed by 

 later authors. 



From the published records the distribution of this genus is 

 largely in the Pacific and in the South Atlantic. The examination 

 of the Albatross material shows this very strongly, no specimens of 

 Ehrenhergina having been found north of Cape Hatteras in all the 

 abundant material examined from that area. This distribution is 

 confined to the region from south of Hatteras to the Caribbean and 

 the coast of South America. It is also known from the Azores. 



A comparison of the original figures of E. serrata of Reuss with 

 the recent ones of Brady and others will show that our recent forms 

 are very different from the fossil ones. 



