NO. 1 CUSHMAN, MCCULLOCH : ARENACEOUS FORAMINIFERA 83 



smaller than the preceding ones as the last-formed whorl decreases in 

 height; sutures fairly distinct, depressed only in the latest portion; wall 

 finely arenaceous, smoothly finished ; aperture a narrow elliptical open- 

 ing near the base of the last-formed chamber, often with a slight lip. 



Diameter 0.65-0.80 mm; thickness 0.50 mm. 



Holotype (AHF no. 9) from Station 2070. 



This species differs from H. trullissatum in the very much more 

 evolute form, lower coils in the adult and usually a larger number of 

 chambers. It has occurred only at Station 2070 but they appear in con- 

 siderable numbers showing very little variation in its characters. 



Distribution. — Type locality is Guadalupe Island, in 250 fms. 



Haplophragmoldes subinvolutum Cushman and McCulloch, 



new species 

 Plate 7, Figs. 3-5 



Test close coiled, somewhat depressed, sutures umbilicate, mostly 

 involute, periphery rounded or somewhat angled ; chambers distinct, 7 

 or 8 in the adult coil, slightly inflated, triangular in side view, increas- 

 ing rather evenly in size as added ; sutures distinct, depressed, sigmoid ; 

 wall finely arenaceous, with much cement and occasionally larger frag- 

 ments, very smoothly finished on the exterior; af)erture a low arched 

 opening at the base of the apertural face in the median line with a dis- 

 tinct overhanging lip. 



Diameter 0.40-0.65 mm; thickness 0.15-0.30 mm. 



Holotype (AHF no. 10) from Station A-8. 



This species differs from H. columbiense in the more involute test, 

 less compressed and in having the aperture at the base instead of in the 

 apertural face. Localities: A-8, 557, 521, 510, 552, 2014, 55. 



Distribution. — Type locality. Excursion Bay, near Astoria, Puget 

 Sound Cannery, collected at low tide. This species is recorded in 180 

 fms. off North Isla Partida, Mexico, and in 210 fms. at Callao, Peru. 



Genus AMMOBAGULITES Cushman, 1910 

 Ammobaculites cassis (Parker) 



Plate 7, Figs. 7, 8 



Lituola cassis Parker, in Dawson, Canad. Nat., vol. 5, 1870, pp. 

 177, 180, fig. 3. 



Haplophragmium cassis H. B. Brady, Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 304, pi. 33, figs. 17-19.— Egger, Abh. Bay. 



