72 "TERRA NOVA ' EXPEDITION. 



Sub-Family HAUERININAE. 

 AETICULINA. cUOrbigny. 



56. Articulina funalis, Brady. 



ArticuUna funalis, Brady, 1884, FC. p. 185, pi. xiii. figs. 6-11. 



Heron-Allen and Earland, 1914, etc., 191.5. FKA. p. 587. 



Stations 2, 26. 27, 31. 38. 45, 48, 53-55 (4-K. I.). 



Confined to tlie Antarctic area, excepting for two typical specimens from 

 tlie N.Z. area. At a few of the Antarctic Stations near the coastline it is remark- 

 ably abundant and attains a great length. It is also extraordinarily variable in 

 the breadth of the oral extremity. At Station 38 individuals not only attain a 

 great size compared with the normal, but also exhibit a breadth and strength 

 of growth exceeding all other records. They may be compared to Brady's Fig. 2, 

 pi. xiii, attributed by him to A. conico-articulata. These individuals are marked at 

 fairly regular intervals with deep constrictions, suggesting septal divisions, and an 

 examination of the interior of the shell shows that there is an inner thickening, 

 constricting the diameter of the tube, at these points, though the apertures 

 remain practically constant. The bulbous initial extremity exhibits no sign of 

 the milioline commencement predicated by Brady in his description of the species ; 

 it is merely an inflated cavity, but it is always set unsymmetrically, the maxi- 

 mum turgidity extending sometimes on the side of curvature, and sometimes 

 on the opposite side. 



The relationship between this form and Articulina is not very apparent, 

 except through the intermediary of such specimens of A. conico-articulatd as we 

 figured from Kerimba (H.-A. & E., 1914, etc., FKA. 1915, p. .586, pi. xlv, figs. 

 32, 33) and there is something to be said for Rhumbler's action in transferring 

 the species to a new genus, Tubinella. allied to Niibecularia. We have modified 

 our views expressed upon this matter, as a result of the examination of this 

 vast collection of specimens of A. funalis. 



57. Articulina funalis. var. inornata, Brady. 



Articulina funalis var. inornata, Brady, 1884, FC. p. 186, pi. xiii, figs 3-5. 



„ MUett, 1898, etc., FM. 1898, p. 51.3? pi. xxi, fig. 11. 

 Tubinella inornata Rhumbler, 1906, FLC. p. 27, pi. ii, fig. 4. 



Station 3. 



A few typical specimens. 



OPHTHALMIDIUM, Kiibler. 



58. Ophthalmidium margaritiferum, sp. nov. PI. I, Figs. 9-12. 

 Stations 3. 6. 



Test, porcellanous, roughly discoidal, conmiencing with an inflated primordial 

 chamber, followed by one or two convolutions rather rapidly increasing in width, 

 unseptate. The shell then becomes septate, the constrictions being, however, of 



