GLOBIGERINIDAE 401 



A single thick-walled specimen, very like Soldani's original figure (S. 1789, etc., T. 

 i79i>I'Pt II, p. 118, pi. i^o, figs. qq,rr). See, however, our remarks upon this species in 

 our 'Terra Nova' Report (H.-A. & E. 1922, TN, p. 192). In many of the Discovery 

 materials, the affinity of this so-called species to G. dutertrei is very marked, and many 

 specimens might have been ascribed to it. The Type tube of G. helicina in Paris from the 

 " Sub-appenine of Rimini " contains a single large thick-walled Globigeriua in good con- 

 dition. It does not correspond at all with the Soldanian figures, nor with the irregular 

 forms usually associated with the species, but is a high-domed, square (four chambers 

 to the convolution) test, with but slightly inflated chambers. It is no doubt the specimen 

 from which the " Planche inedite " was prepared and which is reproduced in outline by 

 Fornasini (F. 1898, GFI, p. 209, fig. 4). But so far as the specific name helicina goes 

 the species must rest on Soldani's figures substantiated by Brady's later figures which 

 are in general agreement. D'Orbigny's Type specimen never having been described or 

 figured, except in the unpublished Planche, must be disregarded. Fornasini who was 

 acquainted with the Planche, but not with the Type specimen, considered it to be 

 identical with his own species G. adriatica (F. 1899, GA, p. 582, pi. iii, figs. 6, 7). 



310. Globigerina pachyderma (Ehrenberg) (Plate XIII, figs. 9-13). 



Aristerospira pachy derma, Ehrenberg, 1873, LMT, p. 3S6, pi. i, fig. 4. 

 Globigerina buUoides, Brady, 1878, RRNP ("Arctic variety"), p. 435, pi. xxi, fig. 10. 

 Globigerina bidloides, var. borealis, Brady, 1882, FKE, pp. 716, 717. 

 Globigerina pachyderma, Brady, 1884, FC, p. 600, pi. cxiv, figs. 19, 20. 

 Globigerina pachyderma, Heron-Allen and Earland, 1922, TN, p. 190 (references). 



Twenty-six stations: 51, 53, 228, 230, 235, 236; WS 71, 83, 86, 87, 88, 90, 92, 95, 97, 99, 215, 

 217, 219, 221, 225, 245, 248, 408, 409, 432. 



Universally distributed and often very common, presenting every stage in the reduc- 

 tion of the aperture, from an incurved arch on the final chamber to an almost impercep- 

 tible depression in the centre of the basal plane. A full series illustrating these changes 

 at WS 86, 87 and 245. At 230 a very curious thick-walled form occurs (figs. 12, 13), 

 in which the sutural lines have almost vanished and the shell is almost spherical. The 

 same feature, but in a less thick-walled form, occurs at WS 225 and 408. 



311. Globigerina rubra, d'Orbigny. 



Globigerifia rubra, d'Orbigny, 1839, FC, p. 82, pi. iv, figs. 12, 14. 

 Globigerina canariensis, d'Orbigny, 1839, FIC, p. 133, pi. ii, figs. 10-12. 



Two stations : 5 1 ; WS 88. 



A small specimen at each station. They have the characteristic pink colour; in form 

 they agree fairly well with d'Orbigny's G. canariensis which Brady and others have 

 regarded as a synonym of G. rubra. D'Orbigny however gives the colour of G. canariensis 

 as white, but both Types are missing. The Falkland specimens are not furnished with the 

 subsidiary apertures that are characteristic of tropical specimens. 



