230 GREVILLE, ON NEW DIATOMS. 
I have not seen the lateral view of this species, but in the 
small section of the genus characterised by straight septa 
the coarse striz at once distinguish it. 
CoscINODISCUS. 
Coscinodiscus scintillans, n. sp., Grey.—Disc with a cir- 
cular umbilical space and radiating lines of small, distinct, 
brilliant granules, the long ones wide apart, with 2—3 short, 
very irregular intervening lines at the margin; margin 
striated ; long lines of granules 4 or 5 in:001; marginal 
strie 15 m -001”. Diameter -0032”. (Fig. 6.) 
Hab. Barbadoes deposit, from Cambridge estate; G. M. 
Rrowne, Esq. 
A. very beautiful species, which I have only observed in 
some slides which Mr. Browne obligingly sent for my in- 
spection, the disc in question being one of the objects to 
which he particularly directed my attention. The great 
distance between the lines of granules which reach the centre 
is the leading character; and the very irregular intervening 
lines, varying in length from a couple of granules only, to a 
third of the radius, help to individualise it. The granules 
are singularly brilliant. 
Coscinodiscus griseus, n. sp., Grev.—Disc gray, convex, 
depressed in the centre, with a somewhat indefinite umbi- 
licus; granules equal, in close radiating lines; margin pro- 
minent, with a row of extremely minute puncta on its Imner 
boundary. Diameter about ‘0035”. (Fig. 7.) 
Hab. Barbadoes deposit, from Cambridge estate ; in slides 
communicated by C. Johnson, Esq. 
I am not aware of any described species with which the 
present one can be confounded. But I am under an im- 
pression that one of the same colour, and in some other 
respects very similar, exists in the same deposit, differing, 
however, essentially in the presence of a row of marginal 
tubercles. There is an umbilicus in our present species, but 
it is generally more or less filled up with a little cluster of 
granules. The lines are crowded in the centre, more distinct 
as they approach the margin. The very minute puncta con- 
nected with the latter are easily overlooked. 
ASTEROLAMPRA. 
Asterolampra Moronensis, n. sp., Grev.—Valve subcir- 
cular ; areolated segments somewhat square at the base ; um- 
bilical lines with an angular bend, radiating from a central 
