46 DISCOVERY REPORTS 



Order FORAMINIFERA 



Family MILIOLIDAE 



Sub-family MILIOLININAE 



Genus Pyrgo, Defrance, 1824 



1. Pyrgo depressa (d'Orbigny) (F 2). 



Ten stations: 170, 181, 182, 190, 196; WS 468, 469, 481, 482, 506. 



Frequent at Sts. 181, 196, rarer elsewhere. Some enormous specimens were seen, the 

 largest at St. 181 being over 3-0 mm. in diameter. 



2. Pyrgo murrhyna (Schwager) (F 3) (SG i). 



Nine stations: 384, 385; WS 204, 205, 403, 468, 469, 505, 517. 



Rare or very rare except at Sts. 385 and WS 469, where it is frequent. These are also 

 the only stations at which well-developed specimens occurred; elsewhere they were 

 small and feeble. All the stations are in deep water, between 1500 and 4344 m., and some 

 of them are outside the Antarctic convergence line. 



3. Pyrgo bradyi (Schlumberger) (SG 3). 

 Two stations: 170, 181. 



Rare at both stations; the best and most typical specimens at St. 181 in 160 m. 



4. Pyrgo comata (Brady). 



Biloadma comata, Brady, 1879, etc., RRC, 1881, p. 45; 1884, FC, p. 144, pi. iii, fig. 9. 

 Bilociilhia comata, Schlumberger, 1891, BGF, p. 565, pi. x, figs. 72, 73, text-figs. 26-8. 

 Pyrgo comata, Cushman, 1918, etc., FAO, 1929, p. 73, pi. xix, fig. 8. 



One station: 363. 



A single feebly striate specimen from 329 m., off Zavodovski Island in the South 



Sandwich group. 



5. Pyrgo sarsi (Schlumberger) (F 5). 



Eleven stations: 170, 175, 177, 182, 186, 385, 386; WS 204, 469, 482, 505. 



Rare or very rare except at Sts. 182, 385 and WS 505. The stations show a wide range 

 in depth between 152 and 4773 m., and the largest specimens are found at the shallower 

 stations, particularly fine at Sts. 182 and WS 505. At St. 385, where it is equally common, 

 the specimens are much smaller. 



6. Pyrgo vespertilio (Schlumberger) (F 10 a) (SG 4). 

 Three stations: 170, 175, 363. 



Frequent typical specimens at Sts. 175 and 363 in 200-329 m. Larger but less typical 

 at St. 170, 342 m. 



7. Pyrgo elongata (d'Orbigny) (F 6) (SG 6). 

 Seven stations : 167, 170, 175, 180, 182, 196; WS 482. 



Frequent at most of the stations, all of which are of moderate depth — between 100 

 and 720 m. Very typical specimens generally, especially at St. 167 where the species is 

 rare. At several stations, notably 170 and 182, it attains a comparatively large size, 

 otherwise the specimens are such as would be found in British dredgings. 



