ASTRORHIZIDAE 67 



A few specimens on a stone from 1 52 m. at St. WS 482. It may possibly be of frequent 

 occurrence elsewhere on suitable material, but was not separated until Wiesner's genus 

 was published. 



Cushman (C. 1933, NAF, p. i, pi. i, figs, i, 2) has recently described another form 

 U. arctica, from north-east Greenland. 



I am not convinced that Urnula is a Foraminifer, and not the egg-cases of some un- 

 known organism. I have been familiar with similar bodies for many years, sessile on 

 shells and stones from various parts of the world. They vary much in size, and in the 

 number of chambers, often single, but agree in their thin shell, generally chitinous or of 

 cement without admixture of minerals. They are quite as frequently devoid of aperture 

 as furnished with one, and the aperture when present is generally large, as though an 

 organism had emerged after hatching. 



Genus Webbinella, Rhumbler, 1903 



90. Webbinella depressa, Heron-Allen and Earland (F 64) (SG 65). 

 Five stations: 170, 175, 177; WS 482, 494A. 



Many specimens of different sizes at St. 177 in 1080 m. Single examples only at the 

 other stations. 



91. Webbinella limosa, Earland (SG 66). 

 One station: 369. 



A single specimen on a small pebble from 1767 m., at St. 369 near the South Sand- 

 wich Islands. 



92. Webbinella hemisphaerica (Jones, Parker and Brady) (F 63). 

 Three stations: WS 482, 507 a, 507B. 



Very rare, one or two specimens only at each station. 



93. Webbinella farcta, sp.n. (Plate X, figs. 1-6). 

 One station : WS 482. 



Test arenaceous, large and sessile, more or less circular and hemispherical, the shape 

 varying with the environment. In sheltered depressions it is low-domed, irregularly 

 oval in contour, and with a tendency to spread out at the edges. On exposed surfaces 

 it is compact and high-domed, almost hemispherical. Externally, the test is firmly and 

 smoothly constructed of rather large sand grains embedded in finest grey sand and 

 cement, often with an armature of projecting sponge spicules. Except for its greater 

 size and convexity, and the absence of marginal tubes, it is very similar externally to 

 Tholosina vesicularis, but internally it is very different. When the outer test is removed, 

 the cavity is found to be stuffed with very fine sand, in which are a number (up to six) 

 of large oval or spherical cavities filled with dark protoplasm. There is no apparent 

 communication between these cavities, and the sand though firmly compacted is not 

 cemented together, but can be scraped away with a needle point or a wet brush. When 

 the sand is removed, or in abraded specimens, the base of the cavity is found to be 

 covered with a smooth and firmly cemented floor of similar fine sand; flanges of the 



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