564 Proceedings of Royal Society of Edinburgh. [sess. 
diminishing slightly towards the border ; towards the centre 5, 
towards the border 3J, in *01 mm. — Sch., Atl., pi. lxiii. fig. 10 
(no name). 
Habitat. — Santa Monica deposit (Grunow). 
C. Kurzii, Grim. Sch., Atl ., pi. cxiii. fig. 17. — Diam. *1 1 35 mm. 
Central space small, surrounded by an inconspicuous band of 
areolae. Markings sometimes rounded and free on one side, hexa- 
gonal and in contact on the opposite, increasing from the central 
space for about -J of the radius, thence decreasing rapidly to the 
border ; towards the centre 4, at f of the radius 2, at the border 
6, in ’01 mm.; central papillae evident; minute puncta at the 
origin of the shorter rows; secondary oblique decussating rows 
distinct. Border narrow. 
Habitat. — Elephant Point (Grunow). 
C. spinuligerus, sp. n. Sch., Atl. , pi. lxiii. fig. 3 (no name). — 
Diam. 44 to # 24 mm. Central space subcircular, ’0065 mm. broad, 
surrounding band of large areolae distinct. Markings polygonal, 
3J in *01 mm., distinctly punctate, decreasing on outermost i of 
radius to the border; small apiculi at the border obvious, at 
intervals of about *0075 mm. — Sch., Atl., pi. cxiii. fig. 19 (no name); 
C. aster omphalus, var. spinuligera, Grun., Denh. Wien. Ah., 1884, 
p. 79. 
Sometimes united to C. oculus iridis. The apiculi resemble 
those of C. concinnus, W. Sm. 
Habitat. — Monterey deposit (Schmidt, Grunow) ; Ichahoe guano 
(Schmidt ; Sta Monica deposit (Firth !); Arica (Griindler). 
C. oamaruensis. Grove and Sturt, Jour. Quek. Micr. Cl., 1887, 
p. 68. — Diam. *185 to *25 mm. Surface convex towards the 
centre. Central space obtusely angular, about of diam. broad, 
surrounded by a distinct hand of markings somewhat larger than 
those adjacent to them. Markings 4- to 6-angled, gradually decreas- 
ing from the centre outwards; towards the centre 4 to 4|, towards the 
border 6 to 7, in •01 mm.; central papillae small, indistinct; rows 
straight, or showing wide gentle curves ; apiculi near the border 
minute, at unequal intervals of -0075 to ’01 mm.; at the origin of 
the shorter rows minute puncta sometimes present. Border narrow, 
