F( tr, A:\rTXTFEn A— HEP.OX-ALLEX AND EARLAND. 191 



Stations 2, 3, o, 11, 13, 15, 18, 20, 20-31, 33, 35 38, 42, 45-48, 50, 52-55 

 (+K. I., D.). 



Note. — The early Bibliography of this species has been fully dealt with by 

 Brady {uf supra). He appears to have been convinced that it was a piu'ely Arctic 

 form, and failed to record it in the Antarctic gatherings of the " Challenger." 

 Pearcey, dealing with the " Scotia " material, and having practical knowledge of 

 northern gatherings in which G. pachyderma occurs, recognized the form in the 

 south, and recorded it from the Antarctic. It does not occur in Chapman's 

 Antarctic records. We are still uncertam as to the specific value of the species. 

 The evidence, in our opinion, rather tends in the direction that it is a varietal 

 forni due to the suppression of the comparatively large single aperture of the 

 typical G. dutertrei, combined with a reduction of the general dimensions, and 

 particularly wnth a massive thickening of the shell- wall. In any large assemblage 

 of specimens of G. dutertrei it is not difficult to find a series in which the aper- 

 ture ranges from a high arch to a narrow slit, and when this last form assumes 

 a thick shell-wall obliterating the sutural lines, we reach a specimen which is 

 practically indistinguishable from typical G. pachyderma. 



In the N.Z. area the specimens are few in number. At Stations 2 and 3 

 their nature is more or less uncertain; they may possibly be excessively thick- 

 walled and starved individuals of G. inflata. At Stations 5 and 11. however, the 

 few individuals are typical. South of N.Z. the form increases in frecpiency ; very 

 good specimens occur at Station 28, and as one approaches the South Pole the 

 proportion of typical specimens as compared with thick-w^alled transition-stages 

 of G. dutertrei increases. The only Station at which G. pachyderma is recorded 

 and not G. dutertrei, is Station 52. 



480. Globiycriiut rubra. d'Orbigny. 



Glohigerimi nihni. trOrbigny, 1839, FC. p. 82, pi. iv, figs. 12, U. 



Heron-Allen and Earlaud, 1914, etc., FKA. 1915, p. 079. 



Stations 1-3, G, 7, 54 (+ E. d. J.). 



Never common. l)ut good typical specimens at Stations 2, 3, and 6, and a 

 smgle good one at Station 54. Only two specimens were found showmg the 

 characteristic red colour (Stations 2 and 0). 



481. Globiyerina rubra, var. elevata, d'Orbigny. 



Globigerina elevata, d'Orbigny, 1840, CBP. p. .34, pi. iii, figs. 15, 16. 

 trochoides, Reu.ss, 1845-6, VBK. (1), p. 36, pi. xii, fig. 22. 

 sp. (?) rubra, Brady, 1884, FC. p. 603, pi. Lsxxii, figs. 8, 9. 

 rubra ij.). Chaster, "l892, FS, p. 64. 

 „ Heron-Allen and Earland, 1913, CI. p. 105; 1913, FN8. p. 131, pi. x, 

 figs. 1.3, 15. 



Stations 8-11, 14, 31, 30. 



