NO. 1 CUSHMAN, MCCULLOCH: ARENACEOUS FORAMINIFERA 73 



or 7 in the adult, slightly inflated, sides flattened, increasing rather 

 uniformly in size as added, generally triangular in side view; sutures 

 distinct, somewhat depressed, usually sigmoid ; wall composed of angu- 

 lar arenaceous fragments imbedded in a finer-grained cement, smoothly 

 finished, usually yellowish brown in color; aperture in the adult elon- 

 gate, transverse to the axis of growth, in the median face of the chamber, 

 with distinct lip-like processes. 



Length 0.35-0.70 mm; breadth 0.25-0.50 mm; thickness 0.15- 

 0.20 mm. 



The types of the species were from Queen Charlotte Sound in 25 

 fms. It has proved to be one of the most common species in our ma- 

 terial as will be seen by the list of stations. There is considerable varia- 

 tion. Typical specimens have somewhat triangular chambers in side 

 view which are usually flattened on the sides. The following variety 

 is apparently related to these but has much more rounded chambers 

 and a more open coil. Localities: C-11, 292, 282, 280, 272, 217, 82, 2?, 

 C-7, 2052, 2044, 2046, 2045, 2050, 416, 1042, 1035, 1023, 1022, 2070, 

 2009, 2054, 2035, 2063, 574, ???38, 299, 259, 241, A-6, A-15, V-2, 

 216, 106, 319, 56, 553, 543, 547, 29, C-10, C-13, 2058, 39. 



Distribution. — These studies extend the range of this species north- 

 ward from the type locality of Queen Charlotte Sound in 25 fms. to 

 Hawkins Island, near Cordova, Alaska, in 6-8 fms.; southward to 

 Octavia Bay and Port Utria, Colombia, in 40 to 50 fms., including 

 records of? Central America and the Galapagos Islands. 



Haplophragmoides columbiense Cushman, var. 



evolutum Cushman and McCulloch, new variety 



Plate 5, Figs. 11, 12; Plate 6, Figs. 1, 2 



Variety differing from the typical in the more open coiling, par- 

 ticularly in the adult, and the chambers becoming more globular and 

 inflated, umbilical region depressed. 



Holotype of variety (AHF no. 7) from Station 299. 



This variety, while there are some specimens showing the relation- 

 ships to the typical form of the species, nevertheless seems distinct in 

 much of our material. It is more numerous than the typical and prob- 

 ably has been referred to in the eastern Pacific as "H. canariensis 

 d'Orbigny." It occurs in our material from the following localities: 409, 

 460, 317, 546, 299, 76, 240, 410, 459, 292, 519, 2067, 2066, 2017, 

 2065, 2008, 416, 226, 505, 463, 227, 2007, 266, 298, 290, 504, 413, 

 421, 238, 252, 255, 260, 239, A-6, 5. 



