1888 - 89 .] Mr John Rattray on the Genus Coscinodiscus. 595 
too, there is no central stellette, the markings decrease distinctly 
outwards, and there are no striae at the border. 
Habitat.— Banda Sea, 1200 fathoms; Tamelijk, 2050 fathoms 
(Harting). 
C. clivosus. Pant., Fossil. Bacil. Ung ., p. 72, pi. ii. fig. 16. — 
Diam. T3 to *15 mm. Colour bluish at the centre, outside of this 
with concentric zones of brown, green, or dark grey. Surface 
slightly depressed at the centre for about -§ of radius, outside of this 
showing 4 concentric zones, alternately elevated and depressed, the 
second narrowest and most sharply defined, the fourth similar, but 
merging gradually into the outermost portion. Central space 
indistinct, with scattered isolated granules sometimes absent 
Markings punctiform, towards the centre more distinct and irregular 
8, towards the border 10, in - 01 mm.; rows closely disposed; a broad 
hyaline band within the border. Border striae faint, 8 to 10 in 
•01 mm. 
The colour of this species recalls that of some Actinoeydi , e.g., 
A. Ehrenbergii , Ralfs ( Pritcli . Inf., p. 834). 
Habitat. — Kekko, Szakal, and Szent Peter deposits (Pantocsek !); 
Also-, Felso-, Esztergaly, Mogyorod (Pantocsek !). 
Yar. latefaseiata , Grun. Pant., ibid., p. 72, pi. xxvii. fig. 253.— 
Diam. T1 mm. Central space subcircular, evident, about -^g- of 
diam. broad. The hyaline band within the border much wider, 
J to if- of radius. 
Habitat. — Als6-, Felso-, Esztergaly deposits (Pantocsek !). 
C. depressus. Gregory MS. — Diam. -03 mm. Surface with a 
distinct central depression extending to about J of radius. Central 
space and rosette absent. Markings minute, resolved with 
difficulty, most evident around outer edge of the depression ; rows 
straight. Border sharply defined, with delicate striae, 16 to 18 in 
•01 mm. 
Habitat.— Arran Island (Greville !); Patos Island guano (Nor- 
man !) ; * Maghellan Straits (Cleve !) ; Cape Wankarema (Cleve !) ; 
Greenland (Cleve !). 
* In the collection of Dr Greville. 
