74 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



Description. — Test free, large, composed of an early coiled portion 

 which is soon inclosed by an irregularly massed group of chambers 

 forming the test; biconvex and with a few very coarse short grooved 

 spines at the periphery; the sutures between the chambers usually 

 marked at their intersections by raised bosses, the whole forming a 

 reticulate network. 



Diameter up to 3 mm. 



Distribution. — In the North Pacific this species has been recorded 

 by Brady, the Challenger having obtained it from the shore sands of 

 the Philippines. It is a species of shallow tropical waters. 



Genus GYPSINA Carter, 1877. 



Gypsina Carter (type, G. vesicularis (Parker and Jones)), Ann. Mag. Nat. Hist., 

 ser. 4, vol. 20, 1877, p. 173. — H. B. Brady, Rep. Voy. Challenger, Zoology, 

 vol. 9, 1884, p. 716. 



Description. — Test free or adherent, when free it may be spherical 

 or compressed, when adherent the test takes the form of the object 

 to which it is attached or becomes a raised mass of chambers more 

 or less symmetrical ; early chambers forming a flat spire in the higher 

 species, but in most irregularly arranged throughout; wall coarsely 

 porous. 



There has been some question as to whether the species now placed 

 in this genus belonged to the Foraminifera or elsewhere in the animal 

 kingdom. They seem to have sufficient characters, especially in the 

 higher species, to place them with the Rotaliidse. 



GYPSINA INILffiRENS (Schultze). 

 Plate 21, figs. 6, 7. 



Acervulina inhserens Schultze, Organ, der Polythal., 1854, p. 68, pi. 6, fig. 12. 



Gypsina inhserens H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 

 718, pi. 102, figs. 1-6. — H. B. Brady, Parker, and Jones, Trans. Zool. Soe., 

 vol. 12, 1888, p. 229, pi. 41, fig. 19.— Goes, Kongl. Svensk. Vet. Akad. 

 Handl., vol. 25, No. 9, 1894, p. 91, pi. 15, fig. 787.— Flint, Rep. U. S. Nat. 

 Mus., 1897 (1899), p. 336, pi. 79, fig. 6.— Millet, Journ. Roy. Micr. Soc, 

 1904, p. 599.— Rhumbler, Zool. Jahrb., Abt. Syst., vol. 24, 1906, p. 72, pi. 5, 

 fig. 60. — Sidebottom, Mem. and Proc. Manchester Lit. and Philos. Soc, 

 vol. 53, No. 21, 1909, p. 11. 



Description. — Test adherent, early portion discoidal, later adapting 

 its shape to the surface to which it is attached, composed of numerous 

 chambers, the earliest ones often showing a spiral arrangement, the 

 later ones irregularly massed; sutures distinct, slightly depressed; 

 surface conspicuously punctate. 



Diameter up to 1.50 mm. 



Distribution. — Rhumbler records this species from shallow water off 

 Laysan Island. There are no other North Pacific records. This is 

 essentially a species of shallow waters of tropical or subtropical seas, 

 although there are records for it in some of the warmer portions of 

 the temperate zone. 



