FOEAMINIFERA OF THE KEEIMBA AECHIPELAGO. 549 



It may be compared with Sagenina frondescens Brady, but differs in the nature of its 

 test, which is entirely porcellanous, in the comparatively limited number of branches 

 thrown out from the main tube, and in the absence of inosculation. When the tabes 

 cross each other in the course of their growth they preserve their separate entities, and 

 do not fuse as in Sagenina. 



4. Nubecnlaria Incifuga Defiance. 



Nuhtcularia lucifuga Defrauce, 1825, Diet. Sci. Nat. (Strasburg, 1816-1830)', vol. xxxv. p. 210 ; 

 Atlas Zooph. pi. xliv. fig, 3. 

 „ Brady, 1884, FC. p. 134, pi. i. figs. 9-16. 

 „ Millett, 1898, etc., FM. 1898, p. 261, pi. v. fig. 7. 

 „ Chapman, 1900, FLF. p. 168. 

 „ „ Sidebottom, 1904, ete., RFD. 1904, p. 2, pi. ii. figs. 1-4. 



„ Earland, 1905, FBS. p. 191, pi. xi. figs. 1-3, pi. xiv. fig. 2. 

 „ Heron-Allen & Earland, 1908, etc., SB. 1909, p. 309 ; 1910, p. 404, 

 pi. vi. figs. 1, 2. 



12 Stations. 



Generally distributed, but never very abundant. The species occurs in all its count- 

 less varieties both attached and free, but many of the free specimens show evidence of 

 having lived in the attached condition. Among the variations noticeable the most 

 constant is the plano-convex free form, exhibiting three or more chambers arranged in a 

 discorbine spiral as figured by Sidebottom (RFD. 1904, pi. ii. figs. 1, 2). This variety 

 occurs at Stns. 1, 3, 4, and 7. Another, vertebraline, variety similar to Sidebottom's 

 figs. 3 and 4 occurs at Stn. 9 — it is feebly striate. At Stn. 4 a detached form was 

 observed with a number of chambers in an, irregular linear series. At Stn. 7 the 

 discorbine variety occurs also with a pustulate surface. At Stn. 10 all the specimens 

 were of the normal labyrinthic type. At Stn. 12 the specimens were attached, and 

 pustulate on the surface. 



5. KTubecularia Incifuga, var. decorataj nov. (PL XL. figs. 6, 7.) 



4 Stations. 



Test free or attached, consisting of a number of turgid chambers irregularly disposed 

 in a more or less linear series. One or more apertures on the terminal chamber, 

 sometimes compressed into a slit-like mouth. The surface of the shell is typically 

 milioline, sometimes dull, occasionally highly polished, free from inclusions of sand- 

 grains or foreign matter, and covered with an ornamentation consisting of pustular 

 beads which at times coalesce into irregular verriculations or net-work. In rare 

 instances the surface of the shell is irregularly costate. This handsome variety is rare 

 at Kerimba, where it occurs in the free and attached forms at Stns. 9, 12, 1 X, and on 

 the unlocalised shell-fragment before alluded to. It is widely distributed, as we have 



