62 FOSSIL CIRRIPEDIA. 
Scuta moderately thin, rather broad, approaching to an equilateral triangle ; basal 
margin not quite straight ; the tergo-lateral portion, formed by the upturned zones of 
growth, where widest, half as wide as the rest of valve; apex internally furrowed on the 
tergal side. Carina with the basal margin bluntly pomted. Upper /atera triangular, one 
third the length of the terga. Anterior lower latera, each with a ridge running to near 
one end of their basal margins. 
Lower Chalk, Stoke Ferry, Norfolk. Lower Chalk, Hanover, according to Roemer. Planer (Chalk- 
marl), Sarstedt, near Hildesheim, Mus. Roemer. Upper Chalk, Northfleet and Gravesend, Kent. Chalk 
Detritus, Charing, Kent. Maéstricht Formation, Scania? Mus. Flower, Wetherell, Harris, Univers. Copen- 
hagen, Geolog. Soc., and Bowerbank. 
General remarks. My materials consist of several scuta, in Mr. Flower’s collection from 
Stoke Ferry, together with some carinz, and a rostrum of apparently the same species ; of 
a single scutum from Northfleet, and of others from Charing, both in Kent; of some scuta, 
terga, and carinze, sent me by the great kindness of Roemer, from Sarstedt, near Hildesheim, 
and therefore authentic specimens by him named; and lastly, of a valuable specimen from 
Gravesend, in Kent, in Mr. Bowerbank’s collection (fig. 10, a), im which a carina, pair of 
terga, an upper latus, and two lower latera, were embedded in nearly their proper positions, 
together with a fragment of a scutum, which latter is sufficiently perfect to leave no doubt on 
my mind regarding its identity with the valves from Stoke Ferry, Northfleet, and Sarstedt. 
‘This appears to have been one of the commonest species of Pollicipes during the cretaceous 
period. ‘Though found in the upper chalk of Northfleet and Gravesend, it is singular that 
not a single valve of this species has been collected by Mr. Fitch in the upper chalk of 
Norwich. Amongst the Scanian fossils, collected by M. Angelin at Kopinge, from a still 
higher stage of the chalk, and forwarded to me by Professor Steenstrup, there is an upper 
latus and tergum most closely allied, probably even identical with the present species. 
We have seen that it extends down even to the pliner or chalk marl. 
Scuta (fig. 10, 4, c, d). These valves are moderately thick and convex, so that in their 
upper halves they are almost semi-conical ; the basal margin is not quite straight, it forms a 
rather larger angle with the lower part of the tergo-lateral margin, than with the occludent 
margin, both angles being less than right angles. From the apex two faint ridges run, 
one to the baso-lateral angle, and the second to a point in the basal margin, a little nearer 
to the rostral than to the baso-lateral angle. The valve is bent, so as to be convex, chiefly 
along these two ridges. The tergo-lateral portion formed by the upturned lines of growth 
is wide and protuberant. Outer surface of valve smooth, with the faintest strie radiating 
from the apex. Viewed internally (d), a conspicuous furrow runs from the pit for the 
adductor scutorum muscle up to the apex; the internal occludent edge keeps the same 
width up to the apex. The Sarstedt specimen is the largest scutum which I have seen, 
and that is ‘6 of an inch in length. 
One out of Mr. Flower’s five specimens (believed all to have come from the lower 
chalk of Stoke Ferry) and another in Mr. Wetherell’s collection from the upper chalk of 
