7f, "TKIiP.A NOVA" KXPKlHTrON. 



Stations 3. 4, G. 26. 38, 47, 48. 50. 53 ( + D.). 



To this organism we attach great biological importance, having regard to 

 the fact that it is probably a representative of the earliest and most elementary 

 marine "Rhizopods. Our views and deductions, so far as they have gone already, 

 may be found in the works referred to in the above synonymy. We have 

 suggested that it is of world-wide distribution, and its reappearance in these 

 southern latitudes adds force to our observations. 



It occurs in both areas, the best N.Z., at Station 6. where many large and 

 tvpical examples occur. Also abundant specimens of a small hemispherical 

 chitinous form, very closely resembling the early Selsey examples, originally 

 referred by us to Webbina Jiemispheriea, but with a pronounced aperture at the 

 side near the attached edge. These individuals may probably represent a local 

 form of the initial stage. In the Antarctic the best individuals occurred at 

 Stations 47, 48, and 53, smaller than the N.Z. specimens, excepting at Station 47. 

 but quite tvpical. and exhibiting the chitinous floor admirably. At Station 2(5 

 a single example with a test constructed of very fine mud. 



VANHOEFFENELLA, Rhumbler. 



fii). Vnnhoeffenella gaussii, Rhumbler. PI. I, Figs. 14, 15. 



Vanhoeffenella gaussii, Rhumbler, 1905, MP. p. 105, fig. 9. 

 Rhumbler, 1909, FPE. p. 216, fig. 57. 

 ,, ,, Heron-Allen and Earland. Proc. Zool. Soc. Lond., 1915. p. 29G. 



Heron-Allen and Earland, 1914, etc., FKA. 1915, p. 608. 

 Heron-Allen and Earland. 1916, FSC. p. .37. 



In a small jar containing muddy sand, without any laljel or identifiable 

 particulars beyond the unquestionable fact that the material was from the 

 Antarctic, and, judging by the size of the sand-grains, from comparatively shallow 

 water, were found two perfect individuals of this species. This " find "' proved 

 of exceptional interest to us because a careful examination of the specimens 

 has removed any lingering doubts which we might have had as to the identity 

 of Vanhoeffenella \\'itli Iridia. They are essentially distinct, lender a high 

 magnification the angular framework supporting the characteristic chitinous 

 membrane which forms the two faces of Vanhoeffenella is seen to be a hollow 

 tube with labyrinthic interior, constructed of minute Diatom and mineral debris. 

 At each angular point of the frame there is an external opening from which the 

 dried protoplasm is seen in both specimens to be exuded. The large mass of 

 the protoplasmic body is, however, as in Rhumbler's figure, collected into a 

 rounded, or oval, nodule in the centre of the cavity between the chitinous 

 sides. 



In the absence of details as to locality this jar of material was not 

 systematically examined. 



