606 
Proceedings of Royal Society of Edinburgh. [sess. 
towards the centre and border. C. radiolatus, Weisse (Bull. Ac. 
Imp. Sci, St Peter sib., 1855, p. 276, pi. i. fig. 7), in which the fasci- 
culi recall those of C. symmetricus, Girev., and C. radiolatus, Weisse 
{ibicl., 1868, p. 122, pi. i. fig. 26), — which is identical with C. 
radiatus, Ehrb. — are thus distinct. In Prof. Cleve’s collection, 
specimens named C. radiolatus from Ichaboe guano occur. Com- 
pare C. radiosus , Grun. 
Cosmiodiscus carconensis. Moll., Typ. PI., No. 100 (fide 
Habirsh., Cat. Diat., § Coscinodiscus. — I am unacquainted with 
this form. In the opinion of Mr E. Grove, E.R.M.S., it is pro- 
bably an early name for Stephano discus carconensis, Grun. (Yan 
Heurck, Syn. Diat. Belg., pi. xcv. figs. 1-4), which is stated by 
Habirshaw (Cat. Diat., § Stephcmodiscus) to be synonymous with 
Coscinodiscus carconensis. 
Aidacodiscus apedicellatus, Rattray (Jour. Roy. Micr. Soc. Bond., 
1888, p. 349), has been sometimes associated with Coscinodiscus. 
Nomina nuda. 
C. adinocyclus , Ehrb., Mikrog., p. 130. — Specimens procured 
by Dr Philippi from the Bramahputra, near Burrisal, in 17 fathoms, 
December and January 1842. — Ehrb., Abh. Ber. Ak., 1872, p. 261. 
C. amplius. Ehrb., Abh. Ber. Ak., 1872, p. 202. — Specimens 
collected by Capt. Rogers in the China Sea, lat. 22° 36' N., long. 
116° 38' E., in 17 fathoms. 
C. asymmetricus, Grun., Cleve and Moll., Diat., Nos. 154, 155. — 
Specimens procured from the Balearic Islands. This name occurs 
in Denk. Wien. Ak., 1884, p. 86, where Grunow draws attention 
to its occurrence in the seas of the Southern Hemisphere up to the 
Antarctic Regions. 
C. centranthus. Ehrb., Mikrog., p. 139. — Specimens procured 
from the river Tenasserim, Further India. 
C. delawarensis, Grun. Cleve and Moll., Dial., No. 211. 
Specimens recorded from Delaware. 
C. discoplea. Ehrb., Mikrog., p. 131. — Specimens are recorded 
from the Ganges, near Calcutta, in March (V), April, May, and June 
1842, and from the Bramahputra, near Burrisal, in June, July, 
August, and December 1842. 
