FORAMINIFERA OF THE ATLANTIC OCEAN. 



25 



BIGENERINA NODOSARIA d'Orblgny, var. TEXTULARIOIDEA Goes. 



Plate 5, figs. 8, 9. 



Textularia sagittula Defrance, forma Bigenerina GoSs, Kongl. Svensk. Vet. Akad. 



Handl., vol. i9, pt. 4, 1882, p. 78, pi. h, figs. 159, 160. 

 Clavulina textulariaidea Goiis, Kongl. Svensk. Vet. Akad. Ilandl., vol. 25, 1894, 



p. 42, pi. 8, figs. 387-399; BulL Mus. Comp, Zool., vol. 29, 1896, p. 37, pi. 4, 



figs. 26-38. 

 Bigenerina nodosaria Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 286, pi. 31, 



fig. 4.— CusHMAN, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 51. 



Description. — Variety differing from the typical in the larger size 

 and much greater proportion of the uniserial stage and reduction of 

 the biserial portion, and in the relation of the two, the last-formed 

 chambers of the test being often greater in size than the entire biserial 

 portion. 



Length 3-5 mm. 



Distribution. — Goes described this in the Caribbean as frequent at 

 a depth of 300 meters (164 fallioms). In looking over the material 

 in the Goes collection I find a series of ten specimens, evidently this 

 variety from Albatross station D2315 in 159 fathoms (291 meters). 

 These are marked " Clavulina parisiensis, var. bigerinoides." This 

 name does not appear under Clavulina in the 1896 paper, but on 

 page 9, in the list of species from D2315, this name was found. 

 Immature specimens of this species resemble the typical form, but 

 the adults show very great differences. The Textularian portion is 

 very small compared to the size of the adult test, and the last-formed 

 chambers of the uniserial portion typ'ically being large and globose 

 are often several times the size of the entire biserial portion. It 

 occurs also in shallow water off the northern coast of Jamaica and 

 the Tortugas region. 



Bigenerina nodosaria, var. textularioidea — material examined. 



53568—22- 



