92 "TERRA NOVA" EXPEDITION. 



genus Rhabdammina had been founded by Sars in 1868, and the specific name 

 abijssorum had been already used for a distinct form, and Dawson's generic and 

 specific names have therefore disappeared. 



RHIZAMMINA, Brady. 



102. Rhizammina algaeformis, Brady. 



Bhizammina algaeformis Brady, 1879, etc., RRC. 1879. p. 39, pi. iv., figs. 16, 17. 

 Heron- Allen and Earland, 19U, etc., FKA. 191.5, p. 611. 



Stations 3, 4, G, 26, 27-29. 38. 40, 45, 48, 51, 53, 55. 



Occurs in both areas. The best Stations are 26, 28, 38 and 55. At the h^st 

 Station the best examples were obtained. There is, as usual, a very wide range 

 in the method of construction. Some of the fragments are merely collapsible 

 chitmous tubes with a mud coating, at others a considerable amount of rigidity 

 is attained by agglutination of sand-grains, and, at Station 6, of minute Fora- 

 minifera. 



Family LITUOLIDAE. 

 Sub-Family LITUOLINAE. 

 REOPHAX, Montfort. 



103. Reojihax difflugiformis, Brady. 



Reophax (Uffluriiformis Brady, 1879, etc., RRC. 1879, p. 51, pi. iv., fig. 3. 



Heron-Allen and Earland, 1914, etc., FKA. 191.5, ].. 612. 



Stations 2, 8, 9, 13, 16, 18, 21, 22, 25, 28, 29, 32, 33-35, 40-42, 44-46, 50, 52, 

 55 (+ D.). 



Very generally distributed, but the number of specimens usually small. In 

 the N.Z. area it is somewhat rare, but at Station 9 a curious and interesting 

 variety, composed of mica-plates, occurs. The specimens may be roughly dift'er- 

 entiated into those constructed of coarse sand-grains without visible cement, and 

 those built of fine grains with a greater or less quantity of ferruginous cement. 

 The coarsely-constructed forms predominate and occur exclusively at the majority 

 of Stations, but at Stations 32 and 40 both forms occur and run into one 

 another. At Station 28 a variety occurs in which the neck is very long, some- 

 times twice the length of the body, constructed of very fine sand and ceinent. 

 At Station 29 the same form occurs and is particularly noticeable, the delicately 

 constructed neck projecting from a body built of larger and coarser sand-grains 

 than usual. The southernmost specimens are perhaps larger and more robust 

 than those from northerly Stations, noticeably so at Station 41, where the species 

 is frequent. A globular type (c/. Haplophragmium scruposum, Berthelin (B. 1880, 

 EAM. p. 21, pi. i (xxiv), fig. 1), occurs. The same form, but rather more ovate, 

 occurs at Station 50, in company with an isomorph of Lagena laevis, both being 



