Dr. H. Woodivard — Cirripedes from Trimmingham Chalk. 347 



apex is acute, the base more or less obtuse ; a slightly raised keel 

 runs from tlie apex to the base, and divides the valve into iw(y not 

 quite equal halves, the occludent half being the larger ; the lines of 

 growth run parallel to the lovper borders of the valve, and bend 

 upwards on either side of the raised keel or ridge ; a wide square- 

 edged depression runs parallel to the occludent margin, which is itself 

 rounded and protuberant. (All the terga of P. Angelini I have seen 

 are from the Chalk of Trimmingham.) 



Scutum. — The scutum (Fig. 25) is 21 mm. in length ; its breadth 

 is only estimated, being imperfect along its free margin ; it was 

 probably 9 mm. in breadth. Thorpe Pit, Norwich. (Coll. Dr. Eowe.) 



Fig. 28. 



Fig. 29. 



Fig. 30. 

 Fig. 31. 



Fig. 32. 



?FoUicipes E'misinanni,'D?iT-wm. Scutum. x2nat. size. Chalk, Thorpe, 



near Norwich. (Dr. A. Eowe's Coll.) 

 Follicipes concinna, sp. nov., H. Woodw. Carinal latus. x 3 nat. size. 



Chalk, Trimmingham. (R. M. Brydone's Coll.) 

 Ditto. X 2 nat. size. 

 ? Follicipes striatus, Darw., var. paueistriatus, H. "Woodw. Scutum, 



X 2 nat. size. Chalk, Trimmingham. (R. M. Brydone's Coll.) 

 Ditto. Tergum. x 2 nat. size. Ditto. 



4. ? Follicipes Hausmanni, Darwin, 1851. (Fig. 28.) 



Follicipes Hausmanni, Koch & Dunker: Norddeutsch. Oolithgebild., p. 52, tab. vi, 



fig. 6. 

 Pollmpes Sausmanni, Darwin, Mon. Foss. Lepadida3 : Pal. Soc, vol. v (1851), 



p. 53, t. iii, fig. 3. 



Darwin has figured a carina, scutum, and tergum of this species 

 from Hilsthon des Elligser Brinkes (Lower Greensand, Germany). 

 I doubtfully refer a scutum, from Dr. Eowe's collection, to this 

 species, obtained by him from the Chalk of Thorpe, near Norwich. 

 Length of valve 12 mm., breadth (probably) 7 mm., basal angle 

 broken. This is an elegant valve, with an acute and incurved apex ; 

 the base of the valve was probably straight, the inner margin curving 

 rapidly upwards towards the tergal border ; the surface ornamented 

 by well-marked periodic lines of growth, stronger than the rest, 

 which are parallel to the base and bend upwards on the inner 

 occludent margin, and are slightly undulated near the tergal border. 



