^5 DISCOVERY REPORTS 



of these extensions, it is probable that many broken specimens were included in the 

 fragmentary Pelosinae which formed a large proportion of the gathering. Such broken 

 specimens without extensions would not be distinguishable from P. variabilis, which 

 is recorded as very common at this station. It is even a question whether P. variabilis 

 is a true species at all, or merely a mutilated or undeveloped condition of P. arborescens. 

 Pearcey also hints at this theory in his description of the species. 



P. arborescens was first described and figured from 2620 fathoms in the Weddell Sea, 

 but better specimens had previously been obtained from shallow water on the west 

 coast of Scotland, and elsewhere in the North Sea. 



It seems to me probable that the extraordinary organism figured and described by 

 Pearcey under the name Hyperammina palmiformis (P. 1888, FFC, p. 171, pi. iii) is only 

 Pelosina arborescens using Globigerina ooze instead of mud for the construction of its 

 dichotomously branching test. It certainly is not a Hyperammina, and it has no essential 

 points of diff"erence from Pelosina arborescens except the thinner wall of the test. If their 

 identity were proved, the earlier name, palmiformis would have priority over arborescens. 



56. Pelosina cylindrica, Brady. 



Pelosina cylindrica, Brady, 1884, FC, p. 236, pi. xxvi, figs. 1-6. 

 Pelosina cylindrica. Chapman, 1914, FORS, p. 60, pi. ii, fig. 10. 

 Pelosina cylindrica, Pearcey, 1914, SNA, p. 1002. 



Pelosina cylindrica, Cushman, 1918, etc., FAO, 1918, p. 54, pi. xxii, fig. 5. 

 Pelosina cylindrica, Heron-Allen and Earland, 1922, TN, p. 77. 

 Pelosina cylindrica, Wiesner, 1931, FDSE, p. 83, pi. vi, figs. 66, 67. 



Five stations: 167, 181, 182, 194, 196. 



Rare, but excellent specimens were obtained at all the stations which are confined to 

 the area between the South Orkneys and the Palmer Archipelago, in depths of 160- 

 812 m. This species, which is usually confined to deep water, appears to be indifl^erent 

 to depth in the Antarctic Seas. Chapman's records are from 121-330 fathoms in the 

 Ross Sea, and the ' Terra Nova ' specimens, also from the Ross Sea, were from 45-250 

 fathoms. On the other hand Pearcey 's records from the Weddell Sea are from 1410- 

 2620 fathoms, and Wiesner found it off Kaiser Wilhelm's Land at depths ranging from 

 385 to 3410 m. 



57. Pelosina rotundata, Brady (SG 40). 

 Two stations: 180; WS 203. 



Small specimens are not uncommon at St. 180 in the Palmer Archipelago, depth 

 160 m. At the other station, WS 203, in the deep water of the Scotia Sea (4259 m.), a 

 single large specimen was found, with a test composed of diatoms and Radiolaria. 



58. Pelosina fusiformis, Earland (SG 41). 

 Two stations: 167, 177. 



Rare, but quite typical at St. 167, off the South Orkneys, in 244-344 "i- At St. 177 

 in the Bransfield Strait, 1080 m., a single very large specimen with a prominent neck 

 at each extremity. The test is almost entirely composed of mud, a few small sand grains 

 being neatly incorporated. It is nearly three times the size of the South Georgia types. 



