588 Proceedings of Royal Society of Edinburgh. [sess. 
*02 to ‘03 mm. Surface with central portion funnel-shaped, round, 
and sharply defined in valve aspect. Central space and rosette 
absent. Markings small, rounded, granular, decreasing from the 
edge of the central portion to the border ; rows straight. 
In Spitzbergen specimens the central portion extends to about 
J- of the radius, and the rows of markings are traceable to the 
centre. Cape Wankarema valves show the central portion extend- 
ing to about J of the radius, and surrounded by a distinct irregular 
clear band, bearing faint markings. The markings outside of this 
band increase gradually outwards to the border (Cleve, ibid., pi. 
xxxviii. fig. 815). The latter may be distinguished as var. warika- 
remensis. 
Habitat. — Spitzbergen (Cleve !). 
C. grayianus * sp. n. — Diam. T 05 mm. Surface rising slightly 
from the edges of the central space to the elevated ring, the latter 
sharply defined, *0075 mm. broad, placed near the semiradius, from 
its outer edge, a short gentle slope passing gradually into the flat 
band reaching the border. Central space subcircular, J to -J- of 
diam. broad, bearing several round isolated granules. Markings 
around the central space round, granular, with narrow hyaline 
interspaces ; beyond this to the elevated ring in moniliform rows, 6 
in *01 mm., upon this ring angular 4 in *01 mm., with distinct 
central papillae and irregular, beyond this again in moniliform rows 
to the inner edge of the flat band adjacent to the border, upon this 
band round, free, granular, with narrow hyaline interspaces, 6 in - 01 
mm. ; apiculi minute at subregular intervals. Border *005 mm. 
broad, with distinct striae 8 in *01 mm. — (Pl. II. fig. 12.) 
Habitat. — Antarctic ooze 1950 fathoms (Rae !). 
C. notabilis , sp. n. — Diam. T mm. Surface almost flat. 
Central space circular, sharply defined, about ^ of diam. broad. 
Markings subpearly, obtusely angular, increasing from the centre 
to about the semiradius, again decreasing to the border ; towards the 
centre 5, at the semiradius 4J, at the border 8, in *01 mm.; on a 
narrow indistinct zone, adjacent to the border, punctiform; rows 
with slight bendings, separated by narrow clear lines, most evident 
* Named in honour of W. J. Gray, Esq., M.I). 
