548 MESSES. E. HEEON-ALLEN AND A. EAELAND ON THE 



Family MILIOLID/E. 



Subfamily NuBECULAKiiNiE. 



NuBECULAEiA Defrance. 



1. IfubeCTllarla tiMa Jones & Parker. 



Nubecularia tibia Jones & Parker, 1860, FCD. p. 455, pi. xx. figs. 48-51. 

 „ Brady, 1879, etc., RRC. 1879, p. 53, pi. viii. figs. 1, 2. 

 „ Brady, 1884, FC. p. 135, pi. i. figs. 1-4. 

 „ Chapman, 1893, PCT. p. 516, pi. xv. tig. 1. 

 „ Millett, 1898, etc., FM. 1898, p. 261, pi. v. fig. 3. 



3 Stations. 



Single specimens attached to shell-fragments at Stns. 2 a and 3 consisting of four 

 or five chambers in a linear series, and a free specimen (imperfect) consisting of one 

 chamber only at Stn. 7. This species appears to be particularly fragile, and is seldom 

 found in the fi'ee condition except in fragments. When attached, and therefore less 

 subject to fracture, it often attains considerable proportions ; we have specimens from 

 Torres Straits, attached to shell-fragments, attaining a length of 4-5 mm. 



2. E'ul3eciilaria depressa Chapman. 



Nubecularia depressa Chapman, 1891, etc., GF. 1891, p. 573, pi. ix. fig. 1. 

 „ lucifuga Gough, 1906, FLL. p. 3, pi. i. figs. 1, 2. 



,, depressa Heron-AUeii & Earland, 1913, CI. p. 19, pi. i. fii^s. 1-3. 



3 Stations. 



A few small but typical specimens attached to shell-fragments. 



3. Nubecularia tulbulosa, sp. n. (Pi. XL. figs. 1-5.) 



4 stations. 



Test attached, porcellanous, commencing with a small initial series of chambers 

 arranged in milioline fashion, followed by a more or less compressed and irregularly 

 branching tube of constant diameter extending to great lengths all over the surface 

 of the host-organism, which at Kerimba is usually one of the calcareous algae. The 

 marginal edges of the tube at the point of attachment to the host are often famished 

 with a carina so as to present a wider surface of attachment. This is especially 

 the case in the earlier portion of the test. Aperture, usually a simple opening at the 

 end of each branch of the tube, but in some instances the tube expands into a small 

 depressed chamber, the terminal face of which is cribrate. The tube sometimes passes 

 directly across depressions in the surface of the host without attachment. Diameter 

 of tube •03-"05 mm. 



The species was found at Stns. 2 §, 1 X, and 12, and, in greater quantity and finer than 

 elsewhere, upon a shell-fragment, the precise locus of origin of which was unnoted. 



