506 T. H. Withers — New Species of Cirripedes. 



species Pollicipes lithotry aides, Bosquet sp., from the Maestrichtian, 

 and P. fallax, Darwin, from the Upper Senonian. With B. fallax in 

 particular both the carinse now to be described agree remarkably 

 in general shape, structure, and type of ornament, so that, in the 

 absence of more precise evidence as to the remaining valves, they 

 may be referred provisionally to the genus Brachijlepas. 



BkACHTLEPAS (?) FIMBRIATUS, sp. DOV. PI. XXIII, Figs. Iff, b. 



Diagnosis. — Carina semi-cylindrical, strongly convex transversely, 

 not carinated, with an almost straight basal margin. Ornamented 

 exteriorly with about nineteen regularly-spaced, prominent, transverse 

 ridges, extending almost straight across the valve, closely and regu- 

 larly undulatorj', having a goffered appearance, which is emphasized 

 bj' the ridges being crossed by about eighteen rounded longitudinal 

 ridges radiating from the apex ; the growth-lines between the 

 transverse ridges also form slightly-raised ridges. 



Material. — A single well-preserved carina, somewhat broken at the 

 apex, and embedded in a piece of hard red limestone. 



Horizon and Locality. — Tithoniau, lied Limestone : Stramberg, 

 Moravia. 



Description of Holotype. — Carina semi-cylindrical, widening gradually 

 from the a[)ex to the basal margin ; slightly bowed inwards; strongly 

 convex transversely, not carinated; basal margin almost straight, but 

 in the earlier stages of growth there is a tendency for the transverse 

 ridges to be convex near the margins and concave in the middle. 

 Outer surface ornamented with about nineteen prominent transverse 

 ridges, terminating each period of growth, and extending almost 

 straight across the valve, the growth-lines between also forming 

 slightly-raised ridges ; these ridges are regularly and closely 

 iindulatory, and the main transverse ridges are steep-sided towards 

 the basal mai'gin, the steep sides being smooth. The transverse 

 ridges are crossed by about eighteen rounded, longitudinal ridges, 

 which are slightly less prominent than the main transverse ridges, 

 and give to them a conspicuously goffered appearance. By the 

 crossing of the transverse and longitudinal ridges the structure of 

 the outer surface appears somewhat cancellated. Inner surface not 

 exposed, but tlie apical portion pi'obably projected freely to some 

 extent. 



Length of valve, circa 13 mm. ; greatest breadth, 5'1 mm. 



BiiACHYLBPAS (?) TiTHONicus, sp. nov. PI. XXIII, Figs. 2«, h. 



Diagnosis. — Carina semi-cylindrical, strongly convex transversely, 

 not cariiuited, with the basal margin slightly concave in the middle 

 and convex at the sides. Ornamented exteriorly with several 

 regularly-spaced, sharp-edged, transverse ridges, not undulatory, the 

 shai'p edges having a rather beaded oimament ; the spaces between 

 the transverse ridges are smooth. 



Material. — A single large cai'ina embedded in a piece of hard white 

 limestone. The apex of the valve has been broken away, and the 



