NO. 1 CUSHMAN, MCCULLOCH : ARENACEOUS FORAMINIFERA 63 



This species is a peculiar one, in its noncompressed form resembling 

 R. moniliformis Siddall. In the adult, however, the later portion and 

 often all but the proloculum is much flattened and spreading. It difTers 

 from R. dentaliniformis H. B, Brady in the shorter chambers, com- 

 pression of the test and elongate aperture without a neck. 



The species occurs at numerous stations and often in considerable 

 numbers retaining its characters unusually well for this genus. Lo- 

 calities: 535, 298, 296, 250, 2000, 57, 505, 2009, 482, 2035, 2016, 

 2075, 290, 241, 293, 230, 278, 474, 294, 257, 242, 546, 540, 2018. 



Distribution. — Numerous stations in the Gulf of California, with 

 a depth range, 20 fms. in Agua Verde Bay to 140 fms. at the north 

 end of Isla Partida; off Lobos de Afuera Island, Peru, and Gorgona 

 Island, Colombia, with a depth range of shore to 22 fms. 



Reophax sp. (?) 

 Plate 3, Fig. 13 



A very few specimens from locality 216 give characters which makes 

 it seem different from any described species but material is not at 

 present sufficient to warrant a full description and name. The specimens 

 are very small and slender. They may possibly be allied to R. scottii 

 Chaster. 



Distribution. — Type locality is Petatlan Bay, Mexico, in 100 to 

 140 fms. 



Reophax dentaliniformis H. B. Brady 

 Plate 4, Figs, 1-5 



A few specimens in our collections have been placed under this 

 specific name with some uncertainty. As the figures show, they repre- 

 sent a considerable range in the amount of overlapping of the chambers, 

 but all have the short neck and rather large aperture characteristic of 

 this species and some of them seem rather close to Brady's type figures. 

 A glance at the literature will show what diverse series of forms have 

 been placed by various authors under this name. Our specimens seem 

 nearer to Brady's types than many which have been referred here. 

 Localities: 55, 251, 226, 286, 249, 241. 



Distribution. — Mexico, off Guadalupe Island in 96 fms. ; large 

 numbers off North Isla Partida in 55 to 225 fms. ; in the Gulf of Cali- 

 fornia this species has been recorded as far north as San Pedro Nolasco 

 Island in 48 fms. 



