1888 - 89 .] Mr John Rattray on the Genus Coscinodiscus. 451 
C. subnitidus , sp. n. Sch., Atl., pi. lviii. fig. 16. — Diam. about 
•11 mm. Surface convex. Central space absent. Markings large, 
rounded, granular, with subequal hyaline interspaces. Border 
broad, not sharply defined on inner edge ; striae coarse, 4 to 5 in 
01 mm. 
Distinguished from C. nitidus by the more convex surface and 
the long striae upon the border. 
Habitat. — Springfield deposit, Barbados (Schmidt). 
C. confusus, sp. n. Sch., Atl., pi. lxiv. fig. 15 (no name). — 
Diam. ’053 mm. Central space small, indefinite, rounded, rosette 
absent. Markings small, rounded, granular, most crowded towards 
the border, with interspaces irregular, largest towards the centre ; 
disposed without order, but short irregularly oblique, straight, or 
slightly curved rows manifest. Border sharply defined, about -jL 
of radius broad, hyaline. 
Habitat. — Campeachy Bay (Schmidt). 
C. splicer oidalis, sp. n. — Diam. -045 mm. Central space absent ; 
a subcircular space, having a few isolated round granules and about 
*0075 mm. broad, placed close to the border at one side of the 
valve. Markings round, granular, 5 in *01 mm., in rows radiating 
and diverging around the excentric space, separated by hyaline 
lines and not traceable at a distance greater than the radius 
from the edge of this space, on the lunate area at the opposite side 
of the valve smaller, and in curved oblique rows, towards the 
the border punctiform in evident regular oblique, decussating rows. 
Border narrow, striae 8 to 10 in. *01 mm. — (PI. I. fig. 15.) 
Habitat . — Monterey (Weissflog !). 
Yar. cincta. Sch., Atl., pi. lviii. fig. 6. — Diam. about ‘07 mm. 
No distinct excentric hyaline space. Markings on one half of 
valve less sharply separated from those on remaining half, the rows 
of larger granules more straight. Border broad, sharply defined ; 
oblique decussating rows evident. 
Schmidt has regarded this as a probable abnormality, but it is 
clearly to be associated under one species with the similar valves from 
Monterey. 
Habitat . — Springfield deposit, Barbados (Weissflog). 
