50 



BULLETIN 104^ UNITED STATES NATIONAL MUSEUM. 



41.6° F. ; bottom of green mud and sand. At this station the species 

 was very abundant, the specimens all of the same sort except for minor 

 variations due to the difference in shape and size of the mica scales. 

 (Cat. No. 9768, U.S.N.M.) 



In the selective power of this species to choose mica scales for its 

 test it may be compared with PsnmmospJiaera bowmanni Heron-^Ulen 

 and Earland, and also to Reophax Hcottii Chaster, both of which use 

 mica scales in the construction of the test. At first sight it was 

 thought that these specimens from the ^Z6«^ross -material might be 

 P. howmani, but they are all typical Proteonina , with a definite 

 aperture and a cylindrical neck. 



Proteonina mimcea — material examined. 



PROTEONINA HELENAE Rhumbler. 



Plate 20, figs. G, 7. 



Proteonina helenae Rhumbler, Foram. Plankton-Exped., pt. 1, 1911, pi. 2, figs. 

 16, 17; pt. 2, 1913, p. 380. 



Description.— Test free, elongate, fusiform; body portion conical, 

 tapering, the initial end generally bluntly pointed, gradually increas- 

 ing in diameter to the base of the neck, where the body is strongly 

 constricted and merges into the cylindrical neck, which is longer than 

 wide and of fairly even diameter; wall composed of entire or broken 

 tests of other foraminifera, especially Globigerinidae, rather neatl}'^ 

 cemented, the outher surface being fairly smooth; aperture circular, 

 fairly large. 



Length, 0.7-1.0 mm. 



Distribution. — Rhumbler describes this species from a station off 

 St. Vincent in 4,980 meters. 



PROTEONINA HYSTRIX (Egger). 



Reophax hystrix Egger, Abh. bay. Akad. Wiss. Miinchen, vol. 18, 1893, p. 25G,pl. 



4, fig. 14. 

 Proteonina hystrix Rhumbler, Arch. Prot., vol. 3, 1903, p. 248, fig. 83 (in text). 



Description. — Test free, somewhat compressed; wall composed of 

 sand grains, with the outside ornamented with an abundance of sponge 

 spicules, all pointing toward the aboral end; apertural end broad, the 

 aperture consisting of a long slit without a definite neck. 



Diameter, about 1 mm. 



