FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 73 



with radial spines, short and somewhat flattened ; entire surface cov- 

 ered with the supplemental skeleton, ornamented exteriorly with 

 short rather obtuse spines giving the whole test a hispid appearance; 

 aperture a series of pores along the inner margin of the chamber. 



Diameter up to 2 mm. 



Distribution. — From the records this species does not seem to have 

 been definitely recorded from the North Pacific. It occurred with 

 C. spengleri in the U. S. Exploring Expedition from Gaspar Straits. 

 Specimens also occurred in Vincennes or Colnett Strait, Albatross 

 H4882, in 248 fathoms, bottom temperature 48.8° F. and in the same 

 region D4922, more common, in 60 fathoms, bottom temperature 

 79.2° F. This is the region from which so many tropical species of 

 Foraminifera were obtained. 



Subfamily 3. TINOPORIN^. 



Test consisting of a close-coiled young followed by chambers irregu- 

 larly arranged, arborescent, irregular or heaped up into a mass of 

 definite form, either free or attached. 



This subfamily consists of three genera as far as the present mate- 

 rial is concerned, Tinoporus, where the arrangement assumes a regular 

 form, Gypsina, where the arrangement in our species is very irregular, 

 and Polytrema, where the chambers are arranged in an arborescent 

 form. 



Most of the living species seem to be characteristic of shallow water 

 of tropical or subtropical regions. 



Genus TINOPORUS (emend.) Carpenter, 1860. 



Tinoporus Montfort (type, T. baculatus Montfort), Conch. Syst., vol. 1, 1808, 

 p. 146.— Carpenter,[( Emend.) Philos. Trans., 1860, p. 557.— H. B. Brady, 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 714. 



Description. — Test free, biconvex, composed of numerous chambers 

 in a mass, the early ones spirally arranged; surface reticulated, with 

 raised tubercles occupying some of the angles of the meshes of the 

 surface; outer walls of the chambers coarsely porous; periphery with 

 several spines. 



This genus is an interesting one, only its early chambers showing 

 its real relation to the other members of the Kotaliidse. 



TINOPORUS BACULATUS [Montfort?] Carpenter. 



Plate 27, fig. 3. 



Tinoporus baculatus (?) Montfort, Conch. Syst., vol. 1, 1808, p. 146. 



Tinoporus baculatus Carpenter, Philos. Trans., 1860, p. 557, 564, pi. 18, figs. 

 2-10; pi. 21, figs. 5-11. — Carpenter, Parker, and Jones, Int. Foram., 

 1862, p. 226, pi. 15, figs. 5-12. — Butschli, in Bronn, Klassen und Ordnungen 

 Thier-Reichs, 1880, p. 216, pi. 13, fig.3.— H.B. Brady, Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 716, pi. 101, figs. 4-7.— Dervieux, Atti R. Accad. 

 Sci. Torino, vol. 29, 1893, p. 6, pi., figs. 19, 26, 34.— Sherlock, Bull. Mus. 

 Comp. Zool., vol. 38, 1903, p. 357, fig. 8.— Millett, Journ. Roy. Micr. Soc, 

 1904, p. 598.— Chapman, Journ. Linn. Soc, Zoology, vol. 30, 1910, p. 424. 



