526 Proceedings of Royal Society of Edinburgh. [ sess . 
Y&Y.valida. Gran., ibid., 1884, p. 80; C. decrescensl * Sch., 
Atl., pi. lxi. fig. 15.— Diam. *1 mm. Central space small, about 
of diam. broad, angular. Markings increasing but little from 
centre for ^ of radius, from the semiradius decreasing rapidly to tlie 
border ; at the central space 2i, from i to \ of radius li to 2 in 
*01 mm.; rows radial, irregularly concentric bands indistinct. 
Habitat. — Springfield deposit, Barbados (Schmidt, Grunow). 
Var. polaris. Grun., ibid., 1884, p. 80, pi. iii. (C), fig. 11. — 
Diam. f 047 to ‘055 mm. Central space small, about of diam. 
road. Markings increasing slightly outwards to the semiradius to 
about 3 in *01 mm. ; rows subfasciculate, and secondary subconcen- 
tric rows evident. 
Habitat. — Franz Josefs Land (Grunow) ; Monterey deposits 
(Hardman !)f Barbados deposits (Greville !). 
Yar. repleta. Grun., ibid., 1884, p. 80, pi. iii. (C), fig. 18. — Diam. 
•0325 to *0825 mm. Surface convex towards the centre. Central 
space absent. Markings 3 to 3^, sometimes 4, in *01 mm. ; 
secondary concentric rows faint, oblique decussating rows undiffer- 
entiated near the border. — In H. L. Sm., Diat. Spec. Typ., 
No. 99. 
Habitat. — Franz Josefs Land (Grunow) ; Oamaru deposit 
(Grove !) ; Japan (H. L. Smith !); Macassar Straits (Grove !). 
C. epiphanes , sp. n. — Diam. *165 to *21 mm. Surface rising 
slightly from the centre for about f of the radius, here descending 
abruptly, and continuing thence on one plain to the border. 
Central space absent, rosette distinct. Markings hexagonal, increas- 
ing slightly from the centre to the highest zone, here decreasing 
suddenly, and from this subequal to the border ; towards the centre 
3, at the highest zone 2 \, towards the border 3 in ’01 mm. ; central 
papillae faint, secondary oblique decussating rows evident. Border 
narrow; striae faint, 8 to 10 in *01 mm. — (PI. II. fig. 14.) 
Habitat . — Bichmond deposit (Deby !). J 
* Quoted “ C. decrescens, var.?” by Grunow ( Derik . Wien. Ah., 1884, 
P- 80). 
+ In the collection of Julien Deb} T . 
+ In a Coscinodiscus type-plate by Thum, in the collection of Julien Deby. 
