NO. 1 CUSHMAN, MCCULLOCH: ARENACEOUS FORAMINIFERA 43 



Genus MILLETTELLA Rhumbler, 1903 



Millettella spinata Cushman and Cahill 



Plate 2, Figs. 1, 2 



Millettella spinata Cushman and Cahill, U. S. Geol. Survey, Prof. 

 Paper 175A, 1933, p. 5, pi. 1, figs. Za-c. 



Test free, much compressed, in front view widest toward the base, 

 thence gradually tapering toward the somewhat broadly truncated or 

 slightly rounded apertural end, the base with two or three spinose pro- 

 jections usually one at each angle and one in the middle; wall arena- 

 ceous with much chitin, smoothly finished except at the base; aperture 

 in a large depression toward the apertural end, extending down into 

 the upper portion of the front face of the test. 



Length 0.20-0.25 mm; breadth 0.20 mm; thickness 0.15 mm. 



This species was originally described from the Miocene, Duplin 

 marl, North Carolina. The recent Pacific material is apparently identi- 

 cal. It is a small species and shows little variation except in the amount 

 of spinosity at the base. 



It occurs at the following localities: A-1, 510, 521. 



Distribution. — Olif wharf, in 8 fms. at Ketchikan, Alaska; off Co- 

 lombia, Port Utria, in 20 fms. 



Millettella glabrella Cushman and McCulIoch, new species 

 Plate 2, Fig. 3 



Test small, flattened at one side, the other broadly convex, consisting 

 of a single chamber, thickest toward the base, thence gradually becoming 

 compressed toward the apertural end, nearly circular in front view; 

 wall arenaceous, smooth, with much chitin ; aperture in a distinct de- 

 pression on the flattened or concave face. 



Length 0.25 mm; breadth 0.20-0.22 mm; thickness 0.15 mm. 



Holotype (AHF no. 3) from Station 510. 



This species differs from Millettella spinata in the more compressed 

 test, more nearly circular front view, and in the smooth base. 



It occurs at the following stations: 510, 521, 539, 557, 583. 



Distribution. — Off wharf at Ketchikan, Alaska; off Panama, Co- 

 lombia, and Ecuador in shallow waters, from 10 to 25 fms. 



Genus PSEUDARGELLA Spandel, 1909 



Pseudarcella arenata Cushman 



Plate 2, Fig. 4 



Pseudarcella arenata Cushman, Florida Geol. Surv., Bull. 4, 1930, 



p.. 15, pi. 1, figs. 2>a, b. — Cushman and Ponton, 1. c. Bull. 9, 1932, p. 39. 



