70 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



Ammodiscus minutissimus Cushman and McCulloch, new species 



Plate 5, Figs, 3, 4 



Test very small, composed of comparatively few coils, periphery 

 rounded, coils considerably overlapping; wall largely chitinous with 

 few very fine sand grains, surface polished ; aperture rounded, at the 

 free end of the tubular chamber. 



Diameter 0.15-0,30 mm; thickness 0,10-0,15. 



Holotype (AHF no, 6) from locality 534, 



This species diiifers from Am?nodiscus pacificus in the very minute 

 size and the highly polished chitinous wall. It has proved to be a rather 

 common and widely distributed species along the eastern coast of the 

 Pacific occurring at the following localities: 57, 80, 82, 266, 281, 293, 

 299, 409, 410, 421, 460, 461, 462, 466, 534, 573, 574, 585, 1033, 

 1035, 1042, 2005, 2008, 2037, 2057, 2062, 2070. 



Distribution. — Type locality, north of the Middle Chincha Island, 

 off Peru in 18 fms. Numerous station records outline a range from San 

 Francisco, California, in 37 to 105 fms,; in the Gulf of California, a 

 depth range of 18 to 75 fms,; in the region of the Galapagos Islands, 

 9 to 80 fms.; off Peru from 18 to 100 fms. 



Genus GLOMOSPIRA Rzehak, 1889 



Glomospira gordialis (Jones and Parker) 



Plate 5, Figs. 5, 6 



Trochammina squamata, var. gordialis Jones and Parker, Quart. 

 Journ. Geol. Soc, vol. 16, 1860, p. 304, — Parker and Jones, Philos, 

 Trans., vol. 155, 1865, p. 408, pi. 15, fig. 32. 



Trocham/nina gordialis W. B. Carpenter, Parker, and Jones, Intr. 

 Foram., 1862, p. 141, pi. 11, fig. 4, — Jones, Parker, and Kirkby, Ann. 

 Mag, Nat, Hist., ser. 4, vol. 4, 1869, p. 390, pi. 13, figs, 7, 8,— 

 Wright, Proc, Belfast Field Club, 1876-77 (App,), pi. 4, fig. 3.— 

 Haeusler, Ann. Mag. Nat. Hist,, ser, 5, vol. 10, 1882, p. 55, pis. 3 

 and 4, figs. 8-20. 



Trochammina (Ammodiscus) gordialis Haeusler, Neues Jahrb., 



1883, p, 59, pi. 4, figs. 2, 3. 



Amfnodiscus gordialis Siddall, Cat, Brit, Rec, For,, 1879, p, 5. — 

 Butschli, in Bronn's Klassen und Ordnungen des Thierreichs, vol. 1, 

 1880, p, 196, pi. 5, fig, 22.— H. B. Brady, Denkschr. Akad. Wiss. 

 Wein, vol. 42, 1881, p, 100; Rep, Voy. Challenger, Zoology, vol. 9, 



1884, p. 333, pi. 38, figs. 7-9.— Haeusler, Neues Jahrb., Beil,-Bd. 4, 



