NO. 1 CUSHMAN, MCCULLOCH: ARENACEOUS FORAMINIFERA 103 



Special Publ. No. 5, Cushman Lab. Foram. Res., 1933, pi. 18, figs. 3a- 

 c. — Earland, Discovery Rep'ts, vol. VII, 1933, p. 86; 1. c, vol. X, 

 1934, p. 99, pi. 3, figs. 41-43; vol. XIII, 1936, p. 37. 



Test trochoid, low spired, composed of about three volutions, the 

 last-formed one consisting of five or six chambers, umbilicate, all cham- 

 bers visible from above, only those of the last- formed coil from below; 

 chambers inflated, subglobose, sutures distinct and deep, nearly at right 

 angles to the periphery; wall of fine sand with an excess of cement, 

 smooth and dully shining; aperture small, a small arched slit where 

 the chamber meets the previous volution on the ventral side and slightly 

 in from the periphery, color clear yellowish brown, the spire often 

 darker than the outer whorl. 



Diameter up to 1.00 mm. 



This species has been seldom recorded in the Pacific but it has 

 occurred in our material at the following localities: 225, C-14, C-10, 

 W-3, 539, 227, 510, 505, 2066, 2067, 2070, 582, 583, 586, 558, A-8, 

 557, 554. 



Distribution. — Off the coast of Alaska, at low tide to the coast of 

 Ecuador, in 15 fms. 



Trochammina pacifica Cushman 

 Plate 11, Fig. 3 



Trochammina pacifica Cushman, Contr. Cushman Lab. Foram. Res., 

 vol. 1, pt. 2, 1925, p. 39, pi. 6, figs. 3a-c; Bull. Scripps Instit. Ocean- 

 ography, Tech. Ser., vol. 1, no. 10, 1927, p. 142. 



Test small, trochoid, composed of several coils, 4-5 chambers in 

 the last-formed one, ventrally umbilicate, periphery rounded ; sutures 

 distinct, slightly depressed, nearly radial; wall finely arenaceous, 

 smoothly finished; aperture a narrow slit at the base of the ventral face 

 of the last-formed chamber. 



Diameter 0.35-0.50 mm. 



This species was originally described from Virago Sound off British 

 Columbia and has been recorded from Queen Charlotte Sound and from 

 off the southern coast of California. It is rather common in our material 

 and occurs at numerous stations as follows: A-2, A-4, A-1, C-10, 2, 3, 

 4, 5, 22, 35, 14, 39, 73, 83, 79, 136, A-15, 300, 317, 322, 319, 462, 

 253, 241, 239, 237, 225, 256, 258, 234, 240, 238, 232, 294, 298, 292, 

 293, 282, 278, 266, 265, 290, 280, 277, 272, 267, 241, 316, 409, 320, 



