ASTRORHIZIDAE 55 



Genus Vanhoeffenella, Rhumbler, 1905 



51. Vanhoeffenella gaussi, Rhumbler (SG 38). 



Thirteen stations: 170, 175, 177, 180-2, 190, 366; WS 393, 479, 482, 496, 497. 



Moderately frequent at Sts. 181, 190, very rare at the remaining stations, nearly all 

 of which are in the South Shetlands area. The range of depth is much greater than in 

 South Georgia, extending down to 1523 m., but the optimum depth is under 200 m. 

 Plastogamy between two individuals was observed at Sts. 170, 190, attachment being 

 obtained by a thread of protoplasm extending from adjacent tubes. 



52. Vanhoeffenella oculus, Earland (SG 39). 

 Five stations: 194, 198, 365; WS 385, 494B. 



Two specimens at St. WS 385, and one at each of the other stations, the depths 

 ranging between 505 and 1838 m. 



It is worth recording that, since the species was described, I have found a specimen in 

 one of my dredgings from the "Cold Area" of the Shetland-Faroe Channel (Scottish 

 Fisheries cruiser ' Goldseeker ', Haul 172, Station XV A, 1280 m., 61° 27' N, 3° 42' W). 

 This is the first record of the occurrence of the genus outside Antarctic Seas. 



Genus Pelosina, Brady, 1879 



53. Pelosina variabilis, Brady (SG 42). 

 Eight stations: 180-2, 377; WS 383, 384, 395, 403. 



Very common and attaining a large size, sometimes 15 mm., at Sts. 181 and 182, fre- 

 quent at St. 180. All these stations are in the Palmer Archipelago in 160-812 m. At the 

 remaining stations it is more or less rare and often fragmentary. The deepest record is 

 at St. WS 403, where a single good specimen with a test composed of Globigerina ooze 

 was found in 3721 m. 



54. Pelosina variabilis var. constricta, Earland (SG 43) (Plate IX, figs. 8-10). 

 Seven stations: 170, 181, 182, 186, 363; WS 383, 482. 



Relatively gigantic specimens are not uncommon at St. 181 in the Palmer Archipelago, 

 ranging up to 40 mm. in length. They have been figured in the South Georgia report 

 (pi. i, figs. 14, 15). Smaller specimens are frequent at St. 186, also in the Palmer 

 Archipelago. At the remaining stations, which are scattered between the South Sand- 

 wich Islands and the Bransfield Strait, the specimens are small and very rare. The 

 specimen figured by Wiesner under the name Pelosina variabilis (W. 1931, FDSE, 

 pi. vi, fig. 69) is unquestionably referable to var. constricta. 



55. Pelosina arborescens, Pearcey (Plate IX, fig. 5-7). 



Pelosina arborescens, Pearcey, 1914, SNA, p. looi, pi. i, figs. 1-5. 



Pelosina arborescens, Cushman, 1918, etc., FAO, 1918, p. 56, pi. xxiii, figs, i, 2. 



One station: iSi. 



St. 181 in the Palmer Archipelago, depth 160-335 "''•' ^^^'^^ notably rich in the genus 

 Pelosina. Among the specimens obtained were four more or less perfect individuals of 

 Pearcey 's species, with dichotomously branching arms. Owing to the extreme fragility 



