Fornminifera 1 M 



Trochamtnina nana (H. B. Brady.) 

 (Plate I, figure 4.) 



Haplophragmium nanum H. B. Brady, Quart. Journ. Micros. Sci. vol. 21, 1881, 

 p. 50, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 311, pi. 35, figs. 6-8. 

 Awerinzew, Mem. Acad. Imp. Sci. St. Petersburg, ser. 8, vol. 29, No. 3, 

 1911, p. 21. 



Trochammina nana Cushman, Bull. 71, U.S. Nat. Mus., pt. 1, 1910, p. 123, 

 figs. 190-192. Pearcey, Trans. Roy. Soc. Edinburgh, vol. 49, 1914, p. 1010. 



Several very typical specimens were obtained at Station 290. These have 

 a reddish brown cement, giving colour to all but the last-formed chamber, 

 which is in all cases lighter in colour than the rest, often nearly white. 



From the records this species seems to be characteristic of cold waters. 

 Brady gives the most characteristic material from off Franz Josef land, very 

 abundant at depths of 89-145 fathoms. He also records it from Nova Zembla, 

 55-219 fathoms. Kiaer records it from the American Arctic, and Awerinzew 

 from several stations in the Siberian Arctic. Pearcey records it from the Ant- 

 arctic, and from Stanley harbour, Falkland islands, in 25 fathoms. There are 

 numerous records of its occurrence in deep cold waters of the various ocean 

 basins. 



Trochammina squamata Jones and Parker. 



Trochammina squamata Jones and Parker, Quart. Journ. Geol. Soc., vol. 16, 

 1860, p. 304. W. B. Carpenter, Parker and Jones, Intr. Foram., 1862, 

 p. 141, pi. 11, fig. 1. H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 337, pi. 41, figs. 3 o-c. Cushman, Bull. 71, U.S. Nat. Mus., pt. 1, 

 1910, p. 120, fig. 187a, 6. Heron- Allen and Earland, Proc. Roy. Irish 

 Acad., vol. 31, pt. 64, 1913, p. 50, pi. 3, figs. 7-10. 



Several specimens from station 20 b-c, with occasional spicules in addition 

 to the sand grains, yellowish brown in colour, the underside with the last-formed 

 chamber, large and scale-like, covering nearly one-third the area of the whole 

 base. 



From station 43c there is a single specimen, somewhat thicker but generally 

 similar. 



Here again it is possible that more than one species have been included 

 under one name by various writers. The species is not a characteristic Arctic 

 one. 



Spiroplecta biformis (Parker and Jones.) 



Textularia agglutinans, var. biformis Parker and Jones, Phil. Trans., vol. 155, 



1865, p. 370, pi. 15, figs. 23, 24. 

 Textularia biformis H. B. Brady, Ann, Mag. Nat. Hist., ser. 5, vol. 1, 1878, 



p. 436, pi. 20, fig. 8. 

 Spiroplecta biformis H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



p. 376, pi. 45, figs. 25-27. Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 



25, No. 9, 1894, p. 38, pi. 7, figs. 308-312. Awerinzew, Mem. Acad. Imp. 



Sci., St. Petersburg, ser. 8, vol. 29, No. 3, l&ll, p. 17. Heron-Allen and 



Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 56. Pearcey, 



Trans. Roy. Soc. Edinburgh, vol. 49, 1914, p. 1012. 



A single specimen from station 290 with the initial end broken, but the 

 characteristic marks so clearly in evidence that there is no question of its identity. 

 This is a characteristic Arctic and cold-water species. Brady records it from 

 Franz-Josef land, 113-145 fathoms; west coast of Nova Zembla, 55-70 fathoms; 



