LITUOLIDAE 75 



according to the minerals employed for building. Size varies up to 2-2 mm. in length, 

 0-8 mm. in greatest breadth. 



This is by far the most abundant representative of the genus in the South Georgia 

 area; very common at St. 148, common at Sts. 27, 126, 144, frequent to very rare at 

 the remaining stations. 



Goes {lit supra) gives a long series of figures ascribed to R. scorpiiirus. Cushman has 

 already separated figs. 160-3 as the types of R. curtus, which differs from R. subfusiformis 

 in the lesser number of chambers, typically three, and the absence of a produced neck. 

 This produced neck, which is so pronounced a feature of R. subfusiformis , is also typical 

 of R. denlaliniformis, Brady, but the chambering of my species is much nearer R. 

 scorpiiirus, and indeed R. subfusiformis might be regarded as occupying a position inter- 

 mediate between these species and combining the most prominent features of each. 



The name is derived from Goes, who describes his fig. 167 as "subfusiformis, e sinu 

 Gullmaren Bahusiae, profund. 140 met." 



97. Reophax pilulifer, Brady (F 82 a). 



Three stations: 30; 53° 00' S, 34° 22' W; WS 523. 



Extremely rare, single specimens and fragments only at these stations, the last two of 

 which are in deep water. 



98. Reophax robustus, Pearcey. 



Reophax robustus, Pearcey, 1914, SNA, p. 1006, pi. i, figs. 6-10. 

 One station: WS 523. 

 A single young specimen with two chambers only. 



99. Reophax fusiformis (Williamson) (F 83). 



Ten stations: 14, 23, 31, 131 ; WS 28, 33, 42, 113, 348; MS 68. 



Very rare everywhere. The best specimens at Sts. 23, 131 and WS 113. 



100. Reophax spiculifer, Brady (Plate II, fig. 20). 



Reophax spicuHfera, Brady, 1879, etc., RRC, 1879, p. 54, pi. iv, figs. 10, 11; 1884, FC, p. 295, 



pi. xxxi, figs. 16, 17. 



Reophax spiculifera. Chapman, 1914, FORS, p. 62, pi. iii, fig. 16. 



Two stations: WS 429, 523. 



Five specimens at WS 429 and two at WS 523, all perfectly typical. This highly 



selective species has a wide distribution. 



ID I. Reophax dentaliniformis, Brady (F 84). 



Three stations: 53° 00' S, 34° 22' W; WS 42, 429. 



Frequent at WS 429 where the specimens are built up of rather coarse sand grains 

 with little cement. Single specimens only at the other stations, but more neatly con- 

 structed and conforming to Brady's figure. 



