38 FOSSIL CIRRIPEDIA. 



Carina naiTow, 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, carinee tecto transverse leniter arcuato, subcarinato, costd cenfrali et costis duabus 

 lateralibm, rotundatis, tumidis ; parietibiis angustis leviter concavis, rectangule wjlexis. 



Carina, with its tectum in a transverse line flatly arched, sub-carinated, 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, naiTOw, 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 



' 8. SCALPELLUM QUADRICARINATUM. 



PoLLiciPES auADRicARiNATus, Rcuss, Verstcin. Bohmisch. Kreideformation (1846), Tab. xlii, fig. 18. 



iS. carind intra-parietibus latis (ut videtur) instruct d ; tecto transverse piano, Icevi, costd prominente 

 utrinque marginato ; margine basali abrupte truncate. 



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 afiinity to the 

 recent 5. rutilum, even than does S. fossula ; thus confirming the view I have taken of the afl5nities 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. 



