158 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



Distribution. — This species is widely distributed and is the most com- 

 mon one of the genus in our material. Off Alaska in 2 fms., southward off 

 Ecuador in 20 fms., including several stations in the shallow waters of 

 the Gulf of California. 



Nonion pizarrense W. Berry, var. basispinatum 



Cushman and Moyer 

 Plate 17, Figs. 8, 9 ; Plate 18, Figs. 4, 5 



Nonion pizarrense W. Berry, var. basispinata Cushman and Moyer, 

 Contr. Cushman Lab. Foram. Res., vol. 6, 1930, p. 54, pi. 7, figs. \^a, b. 

 —Cushman, U.S. Geol. Survey Prof. Paper 191, 1939, p. 25, pi. 6, 

 fig. 28. 



Variety differing from the tj^pical form in the later chambers, which 

 on the outer margin toward the base have a fringe of small, spinose 

 processes, often very conspicuous also along the sutures. 



Stations: A-2, 3, 28, 35, 37, 64, 106, 112, 253, 254, 298, 2038, 

 433, 503, 514, 524, 526, 531, 548, 556, 559, 600. 



Distribution. — This variety was described first from material off San 

 Pedro, 35-50 fms. The analysis indicates a range from Alaska southward 

 to Ecuador, including the Gulf of California, in shallow waters. In 

 Tagus Cove, off Albemarle Island, Galapagos, the recorded depth is 80 

 fms. 



Nonion incisum (Cushman) 

 Plate 17, Fig. 3 



Nonionina incisa Cushman, Contr. Cushman Lab. Foram. Res., vol. 

 1, pt. 4, 1926, p. 90, pi. 13, f^gs. Ua-c; vol. 2, pt. 3, 1926, p. 65. 



Nonion incisa Cushman, Stewart and Stewart, Trans. San Diego Soc. 

 Nat. Hist., vol. 6, 1930, p. 60. — Cushman and Laiming, Journ. Pal., vol. 

 5, 1931, p. 104, pi. 11, figs. \0a, b. — Cushman and Parker, Contr. Cush- 

 man Lab. Foram. Res., vol. 7, 1931, p. 7, pi. 1, figs. 26^^ b. — Cushman 

 and Cahill, U.S. Geol. Survey Prof. Paper 175-A, 1933, p. 20, pi. 7, 

 figs. Aa, b. — Cushman and LeRoy, Journ. Pal., vol. 12, 1938, p. 125, 

 pi. 22, figs. 8fl, Z..— Cushman, U.S. Geol. Survey Prof. Paper 191, 1939, 

 p. 15, pi. 4, fig. 6. 



Test longer than broad, periphery acute, somewhat compressed, um- 

 bilical regions depressed, apertural face heart shaped or broadly triangu- 

 lar, slightly convex; chambers distinct, later ones very slightly inflated, 

 rather uniform in size and shape, increasing slightly in size in the adult, 



