104 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



323, 557, 554, 547, 553, 521, 546, 519, 508, 500, 504, 509, 514, 558, 

 281, 313, 529, 547, 579, 577, 576, 583, 585, 333, 325, ???38, 292, 259, 

 1044, 1047, 1025, 1033, 2027, 2044, 2035, 2045, 2042, 2034, 2032, 

 2026, 2025, 2017, 2013, 2066, 2062, 2054, 2067, 2046, 2002, 2008, 

 2048, 2037, 2033, 2075, 2007, 2012, 2033, 2069, 2070, 275. 



Distribution. — From the type locality, Virago Sound, off British 

 Columbia, these investigations extend the range northward to Cor- 

 dova, Alaska, and southward to Sechura Bay, Peru. 



Trochammina pacifica Cushman, var. simplex Cushman and 



McCulloch, new variety 



Plate 11, Fig. 4 



Variety differing from the typical in the smaller size, more globular 

 chambers, radial sutures on the ventral side and more rounded pe- 

 riphery. 



Holotype of variety (AHF no. 18) from locality 298. 



This varietal form is related to the typical but may be distinguished 

 where the two occur together. It occurs at the following stations: 562, 

 573, 569, 566, 215, 263, 1034, 2061, 2033, 2008, 2065, 2024, 266. 



Distribution. — Type locality is Agua Verde Bay, Lower California, 

 Mexico, in 20 fms. Other records indicate a range as far north as San 

 Francisco, California, in 38 fms. and southward to Peru, Lobos de 

 Afuera, in 15 fms. 



Trochammina charlottensis Cushman 

 Plate 11, Figs. 5, 6 



Trochammina charlottensis Cushman, Contr. Cushman Lab. Foram. 

 Res., vol. 1, pt. 2, 1925, p. 39, pi. 6, figs. Aa, b. 



Test somewhat compressed, the periphery rounded, all the chambers 

 visible from the dorsal side, those of the ventral side of the last-formed 

 coil visible, very slightly umbilicate, 4 or 5 chambers in the last-formed 

 coil; sutures very distinct, much curved on the dorsal side, slightly so 

 on the ventral, the suture representing the line of growth of the coils 

 also sharply distinct but not depressed ; wall smoothly finished, dark 

 reddish brown; aperture narrow, ventral near the umbilicus. 



Diameter 0.30 mm. 



While this species is not as common as T. pacifica Cushman it has 

 occurred at numerous stations as follows: 223, 227, 466, 432, 285, 

 Lowe-1, 232, 2065, 2019, 584, 585, C-10, ???38, 322, 330, 1034, 



