FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 



Distribution. — One of the stations from which this species was 

 described by Brady is off the coral reefs of Honolulu, Hawaiian 

 Islands, in 40 fathoms, obtained by the Challenger. The only other 

 records for the species in this area are those given by Rhumbler, who 

 found a single specimen from Laysan Island and one from Chatham 

 Island. 



The description is from Brady. 



SPIRILLINA DECORATA H. B. Brady. 



Plate 5, figs. 1, 2. 



Spirillina decorata H. B. Brady, Rep. Voy. Challenger Zoology, vol. 9, 1884, 

 p. 633, pi. 85, figs. 22-25. — Egger, Abh. kon. bay. Akad. Wiss. Miinchen, 

 CI. n, vol. 18, 1893, p. 394, pi. 18, figs. 64, 65.— Millett, Journ. Roy. Micr. 

 Soc, 1903, p. 695.— Rhum- 

 bler, Zool.Jahrb., Abt.Syst, 

 vol.24, 1906, p. 33, pi. 2, fig. 

 11. 



Description. — " Test free, dis- 

 coidal, bilaterally symmetrical 

 or nearly so; composed of six 

 or eight convolutions of a some- 

 what embracing tube. Lateral 

 faces slightly concave, periph- 

 eral edge thin and subcarinate ; 

 perforations obscure in thick- 

 walled specimens, the surfaces 

 of which become pitted and fur- 

 rowed; aperture of the adult 

 somewhat contracted and tri- 

 angular. 



"Diameter 130th inch (0.84 mm.) or more." 



Distribution. — Rhumbler records and figures a single specimen of 

 this species from Laysan Island. This is the only record for the 

 North Pacific. 



The description is from Brady. 



SPIRILLINA OPERCULOIDES, new species. 

 Plate 4, fig. 2. 



Description. — Test small, composed of numerous coils, slightly 

 umbonate on the dorsal surface; surface of dorsal side smooth except 

 the outer coil which is longitudinally striate; periphery rather 

 sharply rounded; ventral side slightly concave; the pores of the wall 

 giving the surface a pitted appearance, otherwise smooth. 



Diameter 0.3 mm. 



70175°— Bull. 71. pt. 5—15 2 



Fig. 7.— Spirili.ina decorata H. B. Brady. X 50. o, 



SIDE VIEW; 6, FRONT VIEW. (ADAPTED FROM BRADY'S 

 FIGURE OF THE TYPE.) 



