36 "TERRA NOVA" EXPEDITION. 



in the tow-nets, bnt they gradually disappear as we proceed into colder water 

 towards the poles ; only one species of Globigerina {G. purhyderma) is found 

 livmg in the Arctic surface waters and another species {G. dutertrei) in the 

 Antarctic waters. Some authors regard these two species as identical." 



With the purport of Murray's last sentence we are in agreement {Vide sub 

 G. dutertrei and G. ])achyderma in our Report). But with the earlier statements 

 we must disagree. No evidence is produced in support of the statement that 

 G. pachyderma is pelagic, but Pearcey and ourselves have demonstrated the 

 existence of both forms in the Antarctic oozes. The whole structure of G. 

 pachyderma is so dissunilar from the other recognised pelagic species in its 

 massive walls, mmute oral aperture and absence of external spines that we must 

 decline to accept Murray's conclusions imtil definite evidence of its occurrence in 

 tow-nettings is produced. For this reason we regret that the few " Terra Nova " 

 watherinffs submitted to us afford insufficient evidence even for the rejection of 

 Murray's record. 



The " Terra Nova " tow-nettings examined yielded the following results : — 



Station No. 5, June 21, 1910, 38° 37' N., 14° 42' W. Surface. Full speed 

 tow-net, 12.30 to 1.15 p.m. Species identified : Globigerina aequilateralis, Brady, 

 G. bulloides, d"Orb., G. conglobata, Brady, Orbulina universa, d'Orb. 



Station No. 7, June 23, 1910. Flora Light, Madeira, N. 60°, E. 7 miles. 

 Surface. Full speed tow-net, 3.15-3.45 p.m. Species identified : Globigerina bul- 

 loides, d'Orb., and Orbulina universa, d'Orb. 



Station 34, July 14, 1910. 2° 38' N., 21° 16' W. Depth, 1 metre. Full speed 

 tow-net, 2-3 p.m. Species identified : Globigerina aequilateralis, Brady, G. bulloides, 

 d'Orb., G. conglobata, Brady, G. sacculifera, Brady, Pulvinulina menardii (d'Orb.), 

 P. canariensis (d'Orb.). 



Station 115, August 16, 1911. 34° 32' S. 172° 20' E. Surface. Full speed 

 tow-net, 3-5 p.m. Species identified : Globigerina aefjuilateralis, Brady, G. 

 sacculifera, Brady, Pulvinulina crassa (d'Orb.), and two minute specimens of 

 Haplophragmium canariense (d'Orb.), recognisable with certainty owing to the 

 agglutinate tests which had not been acted on by the formalin and had preserved 

 their ferruginous tint. These are clearly benthic specunens derived either from wave 

 action if the tow-net was over shallow water (no depth recorded for this Station, 

 which was in the neighbourhood of land), or from the washing of dredged 

 material just before the tow-net was used. Such accidental occurrences are, in 

 our experience, frequent in tow-nettings. 



Station 123, August 19, 1911. Between North Cape and Doubtless Bav, 

 New Zealand. Surface. Full speed tow-net, 11 a.m.-4 p.m. Species identified : 

 Globigerina bidloides, d'Orb., G. dutertrei, d'Orb., Orbulina universa, d'Orb. 

 Pulvinulina canariensi'i (d'Orb.) ; also two small benthic specimens, Pulvinulina 



