76 DISCOVERY REPORTS 



102. Reophax flexibilis, Schlumberger (F 86). 

 One station: WS 32. 



A single fine specimen with sixteen chambers. 



103. Reophax nodulosus, Brady (F 84 a). 



Six stations: 151 ; WS 33, 50, 334, 336, 521. 



Very rare everywhere. Fragments of typical specimens of medium size at St. 151 

 and WS 334. Small but fairly typical at WS 50 and 336. At WS 33 and 521 fragments of 

 a form occur which is assigned with some hesitation to R. nodulosus. The chambers 

 though very variable are long as compared with their breadth, sharply constricted at the 

 sutures and thin-walled, cement predominating over the minerals employed. 



104. Reophax distans, Brady. 



Reophax distans, Brady, 1879, etc., RRC, 1881, p. 50; 1884, FC, p. 296, pi. xxxi, figs. 18-22. 

 Reophax distafis, Faure-Fremiet, 1913-14, FMAF, 1913, p. 260, fig. i ; 1914, p. 2, pi. O, fig. 2. 

 Reophax distans, Cushman, 1918, etc., FAO, 1920, p. 12, pi. iii, figs. 5, 6. 



Three stations: 53° 00' S, 34° 22' W; WS 63, 336. 



A few fragments at each station. There can be little doubt that at WS 63 and 336 they 

 are parts of large specimens of Brady's type, coarsely built. The fragments from 

 53° 00' S, 34° 22' W are more doubtful. They may be terminal chambers either of a 

 more delicately constructed specimen of Brady's type, or perhaps of another and un- 

 described species. 



105. Reophax distans var. gracilis, var.n. (Plate II, fig. 21). 

 Seven stations: 151 ; 53° 00' S, 34° 22' W; WS 334, 336, 353, 429, 522. 



Test elongate, straight or perhaps slightly curved, consisting of pyriform or fusiform 

 chambers connected by more or less elongate stolon tubes. Usually fragmentary, no 

 specimen seen with more than two connected chambers. Wall thin, constructed of fine 

 sand grains embedded in cement. Exterior somewhat rough. Colour pale yellow, darker 

 at the stolons. 



The description is based both on a single specimen (0-45 mm. in length) of two 

 chambers, one of which is apparently the proloculum, and on numerous individual 

 chambers of varyingsizes and proportions. In the two-chambered specimen, the breadth 

 of the chambers is roughly half the length (final chamber 0-2 mm. long, o-i mm. broad), 

 but apparently the length increases in proportion to the size of the chamber and in the 

 largest isolated chambers is three or four times the breadth (separate chambers measure 

 up to 0-7 mm. long, 0-2 mm. broad). 



This very fragile little organism is frequent at WS 334, and 353, rarer at the other 

 stations, all of which are in very deep water. It is probably nearly related to R. distans, 

 Brady, but is sufficiently distinctive to merit varietal rank. Even at the same station there 

 is considerable variation in the size of the sand grains employed, with corresponding 

 differences in the external appearance. Sometimes the sand grains are so small as to be 



