480 
Proceedings of Royal Society of Edinburgh. [sess. 
Yar. moronensis. Grun. MS. — Diana. -0875 mm. Markings with 
central papillae more prominent, scabrous ; secondary, irregularly, 
curved rows, subconcentric within the semiradius ; around the 
border the subradial rows short, inconspicuous. Border narrow ; 
striae 6 or 7 in ‘01 mm. — (PI. I. fig. 21.) 
Habitat. — Moron deposit (Weissflog !). 
C. nitidulus, Grun. Sch., Atl., pi. lviii. figs. 20, 21.- — Sometimes 
trilobate. Diam. *04 to *1175 mm. Central space absent. Mark- 
ings small, round, granular, decreasing slightly towards the border ; 
about 4 in -01 mm.; rows radial, beyond the semiradius subfascicu- 
late ; interspaces hyaline. Border distinct, narrow ; striae 6 to 8 in 
*01 mm. — Yan Heurck, Syn. Diat. Belg ., pi. cxxxii. fig. 2 ; Pant., 
Fossil. Bacil. Ung ., p. 73, pi. xxiv. fig. 214 ; Janisch, Gazelle 
Exped ., taf. v. fig. 13. 
Distinguished from C. nitidus by the smaller size of the markings, 
which decrease less towards the border. 
Habitat. — Campeachy Bay (Yan Heurck, Schmidt.) ; Szakal, 
Szent Peter and Dolje deposits (Pantocsek); Hong Kong (Hard- 
man !) ; * Cambodia (Firth !) ; Springfield deposits, Barbados 
(Firth!); Sta Maria deposit (Grove!); Oamaru deposit (Firth!); 
Bio Janeiro (Hardman !); * Macassar Straits (Grove !) ; between 
Aden and Bab-el-Mandeb (Cleve !). 
Yar. subradians, nov. — Diam. *05 mm. Markings round, granular, 
largest at the centre, decreasing gradually outwards, punctiform at 
the border; interspaces wide, smallest towards the border; rows 
subradial, non-fasciculate, crowded on a distinct zone at the border 
about i of the radius broad. 
Habitat. — Aegina (Schmidt). 
C. suspectus, Janisch. Sch., Atl., pi. lix. fig. 2. — Diam. *106 mm. 
Central space and rosette absent. Markings polygonal, about 7 in 
*01 mm., decreasing slightly towards the border ; rows radial or 
oblique and decussating, the former forming inconspicuous narrow 
fasciculi most evident beyond the semiradius, the latter straight or 
slightly curved outwards. Border narrow, hyaline. — Grun., Denk. 
Wien. Ak., 1884, p. 85. 
In the collection of Julien Deby. 
