322 SUBANTARCTIC ISLANDS OP NEW ZEALAND. [Foraminifera. 



Miliolina ferussacit, d'Orbigny sp. 



Quinqudocidina ferussadi, d'Orbigny, 1826, Ann. Sci. Nat., vol. vii, p. 301, 

 No. 18 ; modele No, 32. Miliolina ferusscuiii, d'Orb. sp., Brady, 1884, 

 Rep. Chall., vol. ix, p. 175, pi. cxiii, figs. 17 a, b. 



Distribution. — Tliis is a widely distributed form. Parker and Jones record it 

 from Baffin's Bay. Brady notes it from the shores of Great Britain, Belgium, and 

 France, the Canaries, and the West Indies. In the Southern Hemisphere it has 

 been noted from Torres Strait. 



Present Occurrence. — Off the Snares ; 60 fathoms ; frequent; typical. Twenty 

 miles north of Auckland Island ; 85 fathoms ; rare. Ten miles north of Enderby 

 Island ; 85 fathoms ; very rare. 



Miliolina chrysostoma, sp. nov. (Plate XIII, figs. 8-10 ; Plate XIV, figs. 1 

 and 4.) 



Description. — Test moderately large, elongately oval, compressed ; two to three 

 chambers visible on each side, the penultimate well inflated, and sometimes even 

 globose. Aboral end rounded, oral end blunt ; aperture laterally compressed, and 

 divided by a prominent septum which extends down to the suture of the penultimate 

 chamber, and sometimes projects beyond the orifice. Septum generally a simple 

 lamina, but sometimes feebly T-shaped. Oral extremity usually stained of a deep- 

 orange tint. 



Measurements. — Length of a typical specimen, 1 -6 mm. ; greatest breadth, 

 0-94 mm. 



Observations. — This species is given to extreme variation, some tests being 

 laterally compressed and triloculine, whilst others are subglobose and externally 

 biloculine. Certain malformations occur, wherein the penultimate chamber is not 

 completely enclosed by the last chamber but has its oral aperture extruding from 

 what is normally the aboral end of the test. In vertical section the test is seen to 

 consist of few chambers, the later of which possess a prominent and characteristic 

 form of aperture ; and in each chamber the orange tint of the buccal area can be 

 seen. 



Affinities. — This species calls to mind Miliolina (Adelosina) laevigata, d'Orbigny,* 

 but is distinguished by the rounded periphery and the prominent and persistent 

 septum. In general contour, however, the present species bears relationship with 

 Brady's M. valvularis (Reuss),t figured from " Challenger " specimens dredged off 

 the north-east coast of New Zealand at 1,100 fathoms. Although related, our 

 specimens are specifically distinct, since not one of them shows the characteristic 

 aperture with the puckered lips as figured by Dr. Brady. 



Occurrence. — Off the Snares ; 60 fathoms ; frequent. Twenty miles north of 

 Auckland Island ; 85 fathoms ; very rare. Ten miles north of Enderby Island ; 

 85 fathoms ; common. 



* Foram. Foss. Vienne, 1845, p. 302, pi. xx, figs. 22-24. Schlumberger, Bull. Soc. Zool. France, 

 1886, vol. xi, p. 549, pi. xvi, figs. 19-21 ; woodcut, fig. 6. 

 t Rep. ChaU., vol. ix. 1884, p. 161, pi. iv, figs. 4, 5. 



