FORAMINIFERA OF THE ATLANTIC OCEAN. 



17 



RHABDAMMINA IRREGULARIS W. B. Carpenier. 



Plate 8, fig. 1. 

 Rhabdammina irregularis W. B. Carpenteu, Proc. Roy. Soc. London, vol. 18, 

 1869, p. GO.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 

 288, pi. 21, fig. 9.— Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 21.— 

 Rhumbler, Arch. Prot., vol. 3, 1903, p. 263, fig. 106 (in text).— -Cushman', 

 Bull. 71, U. S. Nat. Mas., pt. ], 1910, p. 28, figs. 11, 12 (in text). 



Description.-:— Test made up of a dichotomously branching tubular 

 charabef, of nearly uniform diameter; wall of firmly cemented sand 

 grains, exterior rather rough, interior smoothly finished ; ends of the 

 tubes serving as apertures; color usually a yellowish or reddish brown. 



Length, up to 37.5 mm. 



Distribution. — Very little is known of the distribution of this 

 species in the Atlantic. It was desciibed by Carpenter from material 

 dredged on the Lightning expedition and is also recorded from the 

 Bay of Biscay from Le TravalUeur dredgings by Norman and appear- 

 ing in the GJiallenger report as a note by Brady as follows: "I am 

 informed by the Rev. A. M. Norman that a variety with brancxiing 

 arms was also obtained in the dredging operations of Le TravaiUeur 

 in the Bay of Biscay, in 1880." 



In the Pacific in various places, especimly in the region along the 

 western coast of America northward to the Gulf of California it is 

 often YQrj abundant and again in some parts of the deep water of 

 the East Indian region. 



As I have alieady mentioned, in the Pacific material there seems 

 to be some doubt as to the complete form of this species as all material 

 appears to be but fragmentary and broken, the lino of weakness 

 seeming to come just above the point of branching. 



RHABDAMMINA CORNIJTA H. B. Brady. 



Plate 6, figs. 2-5. 



AHtrorhiza comufn H. I>. Hrady. Quart. Journ. Micr. Sci.. vol. 19, 1879, p. 43. 

 pi. 4, figs. 14, 15. 



Rhabdamminn ronuila IF. B. Brady. Proc. Roy. Soc. Edinburgh, vol. 11, 1882, 

 p. 714; Rep. Voy. Chullmger, Zoology, vol. 9, 1884, p. 270, pi. 22, figs. 11-13.— 

 Flint, Ann. Rep. U. R. Nat. Mus., 1897 (1899), p. 271, pi. 14, fig. 2.— Rhum- 

 bler, .Arch. Prot., vol. 3, 1903, p. 264, fig. 107 fin text).— Pearcey, Tranp. 

 Roy. Soc. Edinburgh, vol. 49, 1914, p. 998. 



I\hi~amminn ornuta Eimer and Fickert, Zeitschr. Wise. Zool.. vol. 65, 1899, 

 p. 667. 



