202 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



Test about twice as long as broad, very strongly compressed, keeled, 

 the basal angle of each chamber marked by a backwardly pointing pro- 

 jection from the outer edge of the keel, giving it a dentate appearance, 

 tapering throughout, greatest breadth formed by the last pair of cham- 

 bers; chambers very distinct, slightly if at all inflated, earlier ones very 

 low and broad, increasing slightly in relative height as added, but in the 

 adult much broader than high, not inflated; sutures distinct, strongly 

 limbate, increasing in the amount of obliquity toward the apertural end, 

 and becoming also slightly curved, not depressed; wall smooth, finely per- 

 forate; aperture narrow, elongate, its base opening at the inner margin of 

 the last-formed chamber. Length 0.50 mm. ; breadth 0.25 mm. 



The types of this species are from the Miocene exposures along the 

 coast of Ecuador, but it had a wide distribution in the Miocene of Amer- 

 ica. Specimens seemingly identical were found at Station 1007. 



Distribution. — Station 1007 is two miles west of Santa Barbara Is- 

 land, in 54 fms. 



Bolivina paula Cushman and Cahill 

 Plate 24, Figs. 9-12 



Bolivina paula Cushman and Cahill MS., Cushman and Ponton, 

 Bull. 9, Florida State Geol. Survey, 1932, p. 84, pi. 12, figs. 6a, Z*.— Cush- 

 man and Cahill, Prof. Paper 175A, U.S. Geol. Survey, 1933, p. 26, pi. 8, 

 figs. Ua, ^.—Cushman, Special Publ. 9, 1937, p. 91, pi. 11, fig. 9.— 

 Cushman and McGlamery, Prof. Paper 189D, U.S. Geol. Survey, 1938, 

 p. 107, pi. 25, figs. 14, 18, 19. 



Test minute, about 3 times as long as broad, much compressed, periph- 

 ery subacute, sides for the most part nearly parallel, initial end tapering; 

 chambers numerous, often 12 or more pairs in the adult test, increasing 

 somewhat in height as added, some of the earliest ones being very low; 

 sutures distinct, very slightly if at all depressed, slightly limbate, rather 

 strongly curved backward; wall smooth, finely perforate; aperture an 

 elongate, somewhat comma-shaped opening in the median line of the aper- 

 tural face. Length 0.30-0.35 mm.; breadth 0.15 mm.; thickness 0.06- 

 0.08 mm. 



The types of this species are from the Miocene, and it has been re- 

 corded from the Oligocene. Very similar specimens occur in the eastern 

 Pacific. It is a small species and easily overlooked. 



Stations: A-1, 64, 126, 223, 298, 409, 410, 460, 464, 516, 573, 636, 

 2139. 



