88 "TERRA NOVA" EXPEDITION. 



//. Jriabili>i from the N. Sea (330 in. " Goldseeker " Station ix, B.). De Folin, 

 under the name of H yjyeramminella vemista (de F. 1881, RRT, p. 140, and 

 dc F. 1887, RR, p. 114, fig. 9) figures the proloculuni of a broken specimen from 

 the Bay of Biscay which might have been drawn from one of the N.Z. examples 

 of H. elongata. 



94. Hypemmmina elongata, var. laevigata, Wright. 



Hyperammina elongata, var. laevigata, Wright, 1891, SWl. p. 466, pi. xx, fig. 1. 



Cushmao, 1910, etc., FNP. 1910, p. 61, fig. 75. 



Stations 6, 10, 25, 29, 33, 40, 41. 



Represented, as a rule, by a few^ specimens at each Station, generally fragmentary. 

 At Station 10 the construction is rougher than usual, passing almost imper- 

 ceptibly towards the type. At Station 25, in addition to the normal type, which 

 is perfect but small, a minute specimen was found with a chitinous test shewing 

 adventitious material deposited in a few patches only. 



Wright appears to have been anticipated in his discovery of var. laevigata 

 by Haeusler who, in 1885 (H. 1885, LAI. p. 26. pi. iii, fig. 23) figures a broken 

 individual, and in 1890 (H. 1890, FST, p. 61, pi. ix, fig. 48) a perfect specimen, 

 both under the name of Ammodiscus filum, Schmid ; but the Serpula filiim of 

 Schmid (S. 1867, ZSW, p. 583, pi. vi. fig. 48) is quite dift'erent. obviously Ammo- 

 discus gordialis. or a variety closely akin. Wright's name, therefore, stands in 

 spite of Haeusler's anticipation, imless the fossils described by Howchiu (H. 1888, 

 ACF, p. 535, pi. viii. figs. 1. 2) under the name H. elongata, var. clavatula, 

 prove to be identical with Wright's organism. The figures certainly bear con- 

 siderable resemblance, but Howchin, who appears to have been familiar with 

 recent specimens referable to var. laevigata, to which he refers as '' smooth 

 examples of H. elongata, Brady," differentiates his variety " by their minute 

 dimensions, the proportionately larger size of its primordial chamber and its 

 shorter contour," though he suggests that the latter feature may be due to the 

 broken condition of his fossils. 



95. Hyperammina elongata. var. tenuissima, nov. PL I, fig. 17. 



Station 29. 



Test finely arenaceous, smooth, polished, commencing with a bulbous pri- 

 mordial chamber more than twice the diameter of the tube, which is of practi- 

 cally even diameter throughout its entire length. Colour, pale brown. 



This variety differs from Wright's var. laevigata (a) in the abnormal length 

 of the tube, which in the largest fragment observed attained 1 -5 mm., and (b) 

 in the primordial chamber, which is swollen and club-shaped instead of fusiform, 

 as in Wright's variety. Owing to its extreme fragility, probably none of the 

 specimens found are perfect. 



