22 
SILURIAN 
had evidently never possessed a shelly operculum, and have 
besides an oblique and slightly-sinuous edge to the mouth. 
Full notes on this genus and on the preceding one— Trocho- 
neino , will be found in the descriptions of the first decade of 
the Canadian Survey. See p. 18. 
Rama, a Hindu deity. 
Locality .—Chorhoti Pass, 16,000. (No. 1754.) 
CYCLONEMA SUBTERSULCATA. 
Plate 2, fig. 16. 
C. modica, 7—8 lineas alta, tantum lata, anfractibus convexis, 
sub-depressis, ad basin concavis, insuper fere Iambus, subtus striatis. 
Stria) asperse, a lineis, incrementi sinuosis decussatse. 
Rather larger than the last. We have onty the two last 
whorls; the basal one three times the height of the one above 
it, somewhat depressed above, and flattened below, sufficiently 
so to be sub-angular toward the basal edge. The suture of 
the whorls is not at all flattened. All the upper portion of 
the whorl is smooth, or marked concentrically by very faint 
strife. The base is, on the other hand, strongly and deeply 
ridged by coarse strife crenulated by the cross passage of 
strong lines of growth. These lines are slightly sinuous and 
oblique—as usual in the genus. 
The species a good deal resembles the Cyclonema crebristria 
of the British Caradoc rocks, or the C. bilix of Hall. 
Locality. —Kalajowar, 15,700 feet. (No. 1766.) 
HOLOPEA VARICOSA- 
Plate 2, fig. 17. 
H. depresso-turbinata, lajvis, anfractibus 5 convexis, nec ad sutu- 
ram appressis. Iambus, varicosis. Linese incrementi obliquse, vix 
sinuosae. Basis abbreviata, umbilico parvo ? Alt. 5 lin. Diam. 5 lin 
Height and breadth about equal—not half an inch. The shell 
is depressed, turbinate, smooth, of five whorls, and a minute 
