454 
Proceedings of Royal Society of Edinburgh . [; 
There is systematic convenience in retaining C. granulosus , 
C. marginulatus, and C. cinctus as distinct species, though 
transitions occur. 
Habitat. — Adria, Seychelles, Finmark (Cleve and Grunow) .; 
Quarnero (Yan Heurck); Maaso, Finmark (Cleve and Moller !); 
Greenland (Cleve !) ; Kara (Cleve). 
Var. conspicua , nov. Sch., Atl. pi. lvii. fig. 3 (without name). — 
Diam. ’049 mm. Markings irregular, granular, smaller, and some- 
what more crowded towards the border, interspaces wider ; apiculi 
at border conspicuous, large. Border strise 12 to 13 in *01 mm. — 
Cleve and Grunow, ibid., p. 113. 
Habitat. — Campeachy Bay (?) (Schmidt). 
Yar. distinda , nov. — Diam. *05 mm. Apiculi absent. Border 
much more evident; striae coarse 3J to 4 in # 01 mm. 
Habitat. — Crescent City, Cal. (Weissflog !). 
C. hirtidus, sp. n. Cestodiscus (pulchellus y var. ?) hirtidus Gran., 
Yan Heurck, Syn. Diat. Belg ., pi. cxxvi. fig. 3. — Diam. ’03 mm. 
Surface with the central portion extending to about § of radius, its 
outer edge irregularly rounded, sharply defined. Central space and 
rosette absent. Markings on the central portion round, granular, 
irregular; a few larger triangular dark specks towards the centre, 
the outer portion with evident subregular striae, 9 in *01 mm.; 
apiculi 8, at subequal intervals, inserted at the outer edge of the 
central portion. Border sharply defined, about i- of radius broad. — 
Cestodiscus pulchellus, Habirsh., Cat. Diat., ed. 2, 1885, § Cestodiscus. 
Habitat. — Naparima deposit, Trinidad (Yan Heurck). 
C. subareolatus, sp. n. — Diam. about T25 mm. Surface flat. 
Central space absent. Markings faint, areolate from the centre to 
about the semiradius, beyond this only indistinctly visible at 
intervals ; on the outer -J of the radius closely disposed, distinct, 
radial slightly flexuous, sometimes irregular, subpruinose lines with 
clear linear interspac.es evident. Border? — (PI. I. fig. 10.) 
Fragmentary, the outer portion of the valve being removed close 
to the border. 
Habitat. — Gazelle Expedition (Weissflog !). 
