468 
Proceedings of Royal Society of Edinburgh. [sess. 
and irregularly punctate, the central areola without a prominent 
papilla. 
Habitat. — Franz Josef’s Land (Grunow); Simbirsk deposit, 
Kitton !).* 
C. heteromorphus , sp. n. Sch., Atl ., pi. Ixv. fig. 17 (no name). 
— Diam. *053 mm. Central space and rosette absent. Markings 
angular, about 3 in *01 mm.; central papillse absent ; adjacent to the 
border a broad zone, consisting of a single row of large cylindrical 
areolse, with rounded outer and inner extremities, their sides straight 
or concavo-convex of somewhat unequal length. Border narrow. 
Similar forms, but with more robust markings, occur in the 
Oamaru deposit, and have been regarded by Mr E. Grove either as 
abnormal forms of Stephanophyxis , or as probably belonging to 
Liradiscus. The former opinion, adopted by Schmidt (Atl., pi. cxxx. 
fig. 5) seems to me to be the more tenable. 
Habitat. — Piscataway (Weissflog). 
C. splendidus. Grev., Trans. Micr. Soc. Lond., 1865, p. 44, pi. v. 
fig. 3. — Diam. *065 to *125 mm. Surface convex. Central space 
absent. Markings polygonal, central papillae towards the centre 
1J, decreasing outwards to 2 or 2J in *01 mm., those forming the 
outermost band larger. Border hyaline. — Sch., Atl., pi. Ixv. fig. 11. 
The markings and border are similar to those of Stephanophyxis 
superba , Grun. (Denk. Wien. Ah, 1884, p. 91), but the latter is 
provided with spines. 
Habitat. — Cambridge deposit, Barbados (Johnson !);t “Bar- 
bados” (Greville !); St Vincent, Austral. (Weissflog !). 
C. macraeanus. Grev., Trans. Micr. Soc. Lond., 1865, p. 46, 
pi. v. fig. 4. — Diam. ’0525 to *13 mm. Surface convex towards 
the centre. Central space absent. Markings polygonal, 2J to 3 
in -01 mm., subequal or somewhat smaller near the border ; apiculi 
numerous, large, clavate, attached irregularly at the inner edge of 
the border. Border hyaline, sharply defined, of radius broad. 
Habitat. — “Guano” (Macrae !); f Indian Ocean (Macrae, fide 
Greville) ; Bahia (Kitton !). 
* In the collection of Julien Deby. 
t In the collection of Dr Greville. 
