4KT. 25 FORAMINIFEEA — CUSHMAN AND KELLETT 3 



Mus., pt. 1, 1918, p. 39, pi. 15, figs. 4, 5; Contrib. Canadian Biol., 1921 

 (1922), p. 4. — Heron-Allen and Earland, British Antarctic Exped., Zool., 

 vol. 6, 1922, p. 84. — Cushman, Spec. Publ. No. 1, Cushman Lab. Foram. 

 Res., 1928, pi. 3, figs. 17, 18. 



The records for this species are mostly from relatively cold water. 

 Specimens are recorded from both the Arctic and Antarctic with a 

 few intermediate records. The single specimen figured here is from 

 off Payta, Peru, attached to a flake of mica. 



Attention should be drawn to the peculiar forms figured by Heron- 

 Allen and Earland from the Antarctic under the names Trochammina 

 miformis Grzybowski and T. moniliformis Heron-Allen and Earland 

 which somewhat resemble our specimen. 



Family TEXTULARIIDAE 



Genus TEXTULARIA Defrance, 1824 



TEXTULARIA, species (7) 



Plate 1, figures 4 a, 6 



The figured specimen is broken at both ends and is the only one 

 of this particular form found in the collection. The wall is thin, and 

 the whole test much compressed. It is from off Eten, Peru. 



Genus BIGENERINA d'Orbigny, 1826 



BIGENERINA DELICATULA. new species 



Plate 1, figures 3, 5 



Test minute, elongate, slender, slightly tapering, somewhat com- 

 pressed, early chambers biserial, later ones uniserial, the relative 

 number of each group very variable ; periphery rounded ; earlier cham- 

 bers low and broader than high, later ones increasing in height; sutures 

 fairly distinct, very slightly depressed; wall composed of compara- 

 tively large arenaceous fragments, with a small amount of cement, 

 the whole wall easily collapsible when wet; aperture terminal in the 

 adult, narrowly elliptical. 



Maximum length, 0.35 mm.; breadth, 0.12 mm.; thickness, 0.06 

 mm. 



Holotype—iCsit. No. 20783, U.S.N.M.). From off Payta, Peru. 



This species is abundant at this locality, and specimens were also 

 obtained in material from off Pinatel, Peru. It is a small, very deli- 

 cate species and rather uniform in size. The larger specimens, which 

 are apparently microspheric, assume the uniserial character fairly 

 soon, but there are other smaller ones which prolong the biserial 

 character, and if it were not that the forms occur together and are of 

 the same general size and appearance, might be thought to be 

 Textularia. 



