352 Dr. H. Woodward — Cirripedes from Trimmingham Chalk. 



shaped valve (not unlike a boomerang), broad and pointed at its 

 base, much curved and thickened at its free apex by the infolding 

 and union near its summit of the two lateral walls. A fine furrow 

 runs down the exterior surface of the narrow valve, where the usual 

 prominent ridge of the tergum is seen, nearly parallel to the carinal 

 margin, 



9. SoALPELLUM FOSsuLA, Darwln, 1851. (Fig. 36.) 



Scalpellmn fossula , Darwin, Foss. Lepadidii;, 1851 : Mon. Pal. Soc, 4to, pp. 24, 25, 



tab. i, fig. 4. 

 FoUicipes maximus, J. Sowerby : Min. Conch., table 606 (a tergum), fig. 3. 



Tergum (Fig. 36). — A single left tergum in Dr. Rowe's collection 

 is from the Chalk of Thorpe, Norwich. It is thin, narrow, almost 

 smooth, but instead of a ridge running from the apex to the lowest 





Fig. 36. Scalpclhim fossula, Darwin. Left tergum. x 2 nat. size. Chalk, 



Thorpe, Norwich. (Dr. A. Rowe's Coll.) 

 Fig. 37. Scalpdluni attcnnatum, sp. nov., H. Woodw. x 2 nat. size. Chalk, 



Harford Bridges Pit, Norwich. (Dr. Rowe's Coll.) 

 Fig. 38. ? Brachylepas.^h^iexa.. x 2 nat. size. Chalk, Trimmingham. (Mr. R. M. 



Brydone's Coll.) 

 Fig. 39. Ditto. Same valve as Fig. 38, side view, showing great thickness of valve. 



point of the obliquely diamond-shaped valve, the line is marked by 

 a delicate furrow, as shown in Darwin's figure (tab. i, fig. 46, op. cit). 

 This furrow divides the valve unequally into a very narrow area 

 along the carinal border, and a much wider one, bounded by the 

 scutal margin below and the occludent margin above, the centre of 

 which is again subdivided by a single longitudinal line. Length of 

 valve, 16 mm.; greatest breadth, 8 mm.; scutal margin, 11mm.; 

 occludent margin, 10 mm. 



Recorded by Darwin from the Upper Chalk of Norwich and from 

 Northfleet, Kent. 



10. SCALPELLUM ATTENUATUM, H. Woodw., Sp. nOV. (Fig. 37.) 



Among the collection of specimens sent to me by Dr. Arthur Rowe 

 from the Norwich Chalk is a single tergum from Harford Bridges Pit, 



