FOR AMINIFER A— HERON- ALLEN AND EARLAND. U7 



... it seems to be a species in which the chambers each make a half-coil as 

 added, and its resemblance to Textularia is only superficial." We are quite 

 unable to agree with this. An examination of a very great number of specimens 

 from many localities show that beyond an apical " multiformity "" limited to the 

 first three or four chambers, the shell is a true Textularian. The genus Textu- 

 laria is particularly subject to multiformity in its early stages. In T. inconspicua 

 the early growth appears to be the normal spiroplectine coil observable m most 

 species, but set at a different angle to the subsequent axis of growth. Millett's 

 specimens, which are now in our collection, and which are very numerous, give 

 no support to Cushman"s theory, and the " minute rotalian," to which Millett 

 refers as occurring in association with T. inconspicua, does not appear on his 

 slides, nor is it otherwise referred to in his papers among the Discorbinae. It 

 appears probable, therefore, that in the intervening years between 1899 and 1903 

 he obtained no further evidence inducing him to alter his views in' assigning the 

 form to Textularia. 



179. Textularia concava (Karrer). 



Plecanium concavuw, Karrer, 1868, MFKB. p. 129. pi. i, fig. 3. 



Textularia concava. Heron-Allen and Earland, 1914, etc., FKA, 191.5, p. 624. 



Stations 2-6. 9. 



Confined to the N.Z. area, the best at Stations 3 and 6, where it attains 

 a large size and is very typical and neatly constructed. At the same Stations' 

 occasional specimens are strongly limbate. This variation appears to be the T. 

 crassisepta of Cushman (C. 1910, etc., FNP. 1911, p. 24, fig. 41). At Station 6, 

 intermediate forms linking Karrer's very well-marked type with the wildly 

 growing var. heterostoma occur. At Station 9 the record stands on a single small 

 individual with a hyaline shell. 



180. Textularia concava, var. heterostoma, Fornasini. 



Sagraina qffinis, Fornasini, 188.3, FPS. p. 189, pi. ii. fig. 10. 



Textularia concava, var. heterostoma. Heron-Allen and Earland, 1916, FWS. p. 229, pi. .\L 



figs. 22, 23. 



Stations 3, 4, 6, 8-11, 16, 18, 19, 22, 36 (+ T. d. F., D.). 



The specimens from Stations 3, 4 and 6, especially the latter, are large and 

 typical, exactly representing Fornasini's figures. They are linked up with the 

 type by a few intermediate specimens. The individuals from the remaining 

 Stations present a very different appearance, and, generally speaking, can only 

 be relegated to Fornasini's variety by association with a long series of specimens. 

 They are small, rough in surface-texture, and the aperture is often produced 

 upon a phialine neck instead of being a proininent crescentiform slit. The figure 

 of Sagraina affinis, Fornasini {ut supra) very well represents the prevalent type ; 

 this is the T. catenata of Cushman (C. 1910, etc. F.N.P. 1911, p. 23, figs. 39-40), 



