72 DISCOVERY REPORTS 



Hippocrepinella alba is very rare everywhere, but a good many specimens, more or less 

 fragmentary, have been obtained, the best at Sts. 45, 144, WS 154 and MS 68. Its 

 food consists of ingested Diatom-mud, as in the case of Hippocrepinella hiriidinea. 



Its range in deptli extends between 100 and 270 m. 



Genus Hyperammina, Brady, 1878 



85. Hyperammina elongata, Brady (F 72). 



Four stations: 151 ; WS 353, 373, 523. 



Very pauperate specimens at WS 523, recognizable fragments elsewhere. Always 

 very rare. 



86. Hyperammina laevigata, J. Wright (F 73). 

 One station: WS 33. 



Some recognizable fragments only. 



87. Hyperammina novae-zealandiae, Heron-Allen and Earland (F 75). 



Two stations: 27, 144. 



A very large specimen and a small one at St. 27, also a good specimen at St. 144: all 

 microspheric and typical. 



88. Hyperammina subnodosa, Brady. 



Hyperammina subnodosa, Brady, 1884, FC, p. 259, pi. xxiii, figs. 11-14. 

 Hyperammina subnodosa, Cushman, 1920, CAE, p. 5, pi. i, figs, i, 2. 



Thirteen stations: 20, 27, 45, 123, 126, 131, 140, 144, 148; WS 33, 42, 154, 348. 



Frequent at many of the stations, where its large size makes it a very conspicuous 

 object. The finest series was obtained at Sts. 20, 126 and 144, where specimens up to an 

 inch in length occur. These largest specimens are nearly always much curved, and 

 exhibit a tendency to become narrow at the oral extremity, which is always narrower 

 than the aboral end next to the proloculum. The proloculum varies in diff"erent speci- 

 mens, being sometimes quite inconspicuous but usually a pronounced knob. These 

 differences may represent the microspheric and megalospheric forms. The characteristic 

 constrictions of the tube are extremely marked at St. 144, where some of the specimens 

 might almost be described as jointed. The construction is the same everywhere, fine 

 sand grains and sponge spicules are used in about equal proportions, the spicules pre- 

 dominating towards the apertural end. The tubes are often covered with other sessile 

 Foraminifera, belonging to many genera and even the interior of dead specimens forms 

 a retreat for sessile forms. 



