A REMARKABLE NEW CIRRIPEDE. 953 
convex, a little shorter than the lower margin, which is straight ; 
occludent margin extremely short, and the scutal angle much 
rounded and protuberant ; the valve is depressed near the scutal 
angle, and forms a ridge parallel to the margin. Outer surface 
ornamented with delicate transverse ridges. 
Remarks and Comparison with other Species.—These three valves 
were found with those of Proverruca vinculum, already described 
(p. 946), but there is no evidence to show that they belong to 
one individual. The scutum is ornamented like the valves of 
P. vinculum, but it differs so much from the homologous valve of 
that species that I refer it to a new species, and to the genus 
Scalpellum (sensu lato). The small transverse convexity of the 
valve seems to preclude the possibility of its having formed part 
of a shell as is the case in Proverruca, and therefore representing 
a second species of the genus. Its structure renders it more 
probable that it formed part of a capitulum of a pedunculate 
Cirripede of the genus Scalpellum, but further information is 
needed as to the remaining valves before anything more definite 
can be said regarding the relationship of the species. 
The scutum differs from that of Proverruca vinculum, mainly 
in its much less triangular shape, in the occludent and basal 
margins forming an angle of 90° instead of about 45°, and in the 
absence of an apico-basal ridge. The tergum differs chiefly in 
the presence of a delicate apico-basal furrow, instead of a 
prominent ridge. 
My thanks are due to Dr. F. A. Bather, Dr. W. T. Calman, and 
Mr. C. P. Chatwin for help in connexion with this paper. 
EXPLANATION OF THE PLATE. 
Proverruca vinculum, gen. et sp. n. 
Lower Senonian, Upper part of W. cor-testudinariwm-zone: Slines 
Oak Pit, Worms Heath, Woldingham, Surrey. 
. Fixed scutum. a, outer view of left valve; 6, inner view. 
. Movable scutum. Outer view of a comparatively wide left valve. 
. Movable scutum. a, outer view of left valve; 4, inner view. 
. Fixed tergum. a, outer view of left valve; 6, inner view. 
. Movable tergum. a, outer view of left valve with basal portion broken 
away; 6, inner view. 
. Movable tergum. Outer view of smaller but more complete left valve. 
. Carinal-latus. a, outer view of right valve; 4, inner view. 
. Rostral-latus. a, outer view of incomplete left valve ; 6, inner view. 
. Rostral-latus. a, outer view of nearly complete left valve; 6, inner view. 
Fig.. 
Co OC NI OD Ore co bo 
Sealpellum vimineum, sp. n. 
10. Scutum. a, outer view of left valve of which the tergal portion is 
broken away ; 6, inner view. 
11. Scutum. a, outer view of fragment of a right valve (portion near rostral 
angle) with very pronounced ornament; /, inner view. 
12. Tergum. a, outer view of complete right valve; 6, inner view. 
All figures X circa 8 diameters. 
