38 FOSSIL CIRRIPEDIA. 

Carina narrow, much bowed inwards; tectum apparently separated from the rectangu- 
larly-inflected parietes by a ridge; the intra-parietes extend down half the valve, and are 
there obliquely and abruptly truncated ; basal margin sharply pointed. 
Chalk. 
I know this species only from the plate in Mr. Dixon’s work. Being well aware of 
Mr. J. de C. Sowerby’s great accuracy, I cannot doubt that the intra-parietes are at 
their lower end, abruptly and obliquely truncated in the manner represented in the Plate : 
this character, with its sharply-pointed basal margin, makes me believe the species to be 
new: it comes, I imagine, nearest to S. hastatum.’ 
9. ScaLPELLUM TRILINEATUM. ‘Tab. I, fig. 5. 
S. carine tecto transverse leniter arcuato, subcarinato, costd centrali et costis duabus 
lateralibus, rotundatis, tumidis ; parietibus angustis leviter concavis, rectangulé inflexis. 
Carina, with its tectum in a transverse line flatly arched, sub-carmated, with a central 
and two lateral, rounded protuberant ridges; parietes narrow, slightly concave, rectan- 
gularly inflected. 
Grey Chalk, Dover, Mus. Brit., Flower. Chalk Detritus, Charing, Kent, Mus. Harris. 
Carina (fig. 5, a—d); moderately arched, narrow, gradually widening from the apex to 
the base, plainly marked by lines of growth: no part apparently projected freely. The 
tectum is flatly arched, sub-carinated, with its central crest forming a rounded protuberant 
ridge; on each side, the tectum is bounded by similar, very slightly larger ridges, making 
1 8. ScALPELLUM QUADRICARINATUM. 
PoLLICIPES QUADRICARINATUS, euss, Verstein. Bohmisch. Kreideformation (1846), Tab. xlii, fig. 18. 
S. carind intra-parietibus latis (ut videtur) instructd; tecto transverse plano, levi, costd prominente 
utringue marginato ; margine basali abrupteé truncato. 
Carina having apparently wide intra-parietes ; tectum in a transverse line, flat and smooth, bordered on 
each side by a prominent ridge ; basal margin abruptly truncated. 
Bohemia. Untern Planerkalke (Chalk-marl). 
I know this species only from an imperfect plate, but good description of a carina, in Reuss’ work: it 
is an interesting form, showing in its truncated basal margin and flat tectum a still closer affinity to the 
recent S. rutilum, even than does S. fossula ; thus confirming the view I have taken of the affinities of these 
several species. ; 
Carina; rather narrow, slightly bowed inwards: tectum quite flat and smooth, separated from the 
parietes by a smooth prominent ridge: parietes concave, rectangularly inflected: intra-parietes apparently 
well developed, separated from the parietes by a ridge: basal margin abruptly truncated. 
