ASTRORHIZIDAE 77 



Two stations: WS 474, 507 a. 

 Rare at both stations. 



Genus Rhizammina, Brady, 1879 



129. Rhizammina algaeformis, Brady (SG 94). 

 Three stations: 170; WS 497, 513. 



Fragments of the branching organism which is the type of Brady's species were found 

 at Sts. 170, WS 497 and 513. They constitute the only rehable record. 



The " flat, unbranching, ribbon-like organisms of variable but regular width through- 

 out" which are referred to in the South Georgia report (SG 94) occur at twelve stations, 

 Sts. 167, 194, 196, 197, 362, WS 199, 480, 485, 487, 497, 514, 517, at depths ranging from 

 244 to 3813 m., and are often very abundant. Their real nature remains unsolved. As 

 transparent objects under a high power they appear to be ribbons, not tubes, encrusted 

 with mud and diatoms. They show no structure or signs of protoplasm and I am not 

 disposed at present to accept them as Foraminifera. 



Genus Aschemonella, Brady, 1879 



130. Aschemonella ramuliformis, Brady. 



Aschemonella ramuliformis, Brady, 1884, FC, p. 273, pi. xxvii, figs. 12-15. 

 Aschemonella ramuliformis, Cushman, 1910, etc., FNP, 1910, p. 81, fig. no. 

 Aschemonella ramuliformis, Pearcey, 1914, SNA, p. 1005. 

 Aschemonella ramuliformis, Cushman, 1918, etc., FAO, 1920, p. 2, pi. i, fig. i. 



One station: 181. 



A few fragments, probably referable to this organism, were found at St. 181 in 160 m. 

 The depth is the only factor which raises suspicion as to their attribution, all previous 

 records being from deep water. Pearcey recorded it from 2620 fathoms in the Weddell 

 Sea. 



Genus Hospitella, Rhumbler, 191 1 



131. Hospitella manumissa, Rhumbler (Plate II, fig. 22). 



Hospitellum manumissum, Rhumbler in Wiesner, 193 1, FDSE, p. 89, pi. viii, fig. 98. 



One station: WS 474. 



A single specimen on a sand grain from 2813 m. in the Scotia Sea. It has about 

 twenty chambers visible and agrees very well with Rhumbler 's description of his 

 species: "Shell irregular, crosier-shaped, spiral primordial, growing end irregular, 

 twisted here and there. Shell wall golden brown, transparent, chitin predominating, 

 with very few sand grains. Chambers irregular, bag shaped, with a neck, about equal 

 size". 



I cannot trace any spiral primordial or sand grains in my specimen, which appears to 

 be entirely chitinous. The neck between the separate chambers is short, in most cases 

 only visible as an internal tube passing from one chamber to the next, the walls of the 

 chambers being in actual contact. But in one or two instances there is a distinct space 

 between two chambers traversed by a tube. 



