Dr. H. Woodward — Cirripedea from Trimmingham Chalk. 341 



in the Norwich Castle Museum. See "Catalogue of Types," by 

 F. Leney, Geol. Mag., 1902, Crustacea, p. 226 [2153]. Darwia 

 records the occurrence of this species from the Chalk of Maestricht, 

 Balsberg, and Kopinge, Scania, and from the Oberer Kreidemergel 

 (U. Chalk), Gehrden, in Hanover. 



Five specimens, probably from Plauen, near Dresden (Ober- 

 Quader), have also come into my hands, which, although of larger 

 size, suggest very close relationship to, if not identity with, P.fallax 

 of Darwin. 



Mr. Brydone writes : — " The whole of the specimens of 

 Brachylepas fallax obtained by me at Trimmingham were extracted 

 from the chalk, filling a depression in the base of a large pyramidal 

 flint, in the surface of which there are still imbedded 3 carinse, 

 2 right and 2 left scuta, and a rostrum, all belonging to B. fallax. 

 There are also two valves belonging to some other species imbedded 



Fig. 5. Brachylepas {PoUieipes) fallax, Darwin, sp. External dorsal aspect of 

 carina. All x 2 nat. size. From the Chalk of Trimmingham, Norfolk. 



Fig. 6. Another specimen (same view). 



Fig. 7. Eight side view of Fig. 6. 



Fig. 8. Rostrum, side view (of smaller individual). 



Fig. 9. Eostrum of same species. 



Fig. 10. Sub-rostrum of same. 



in the side of the flint, but otherwise no valves of any other 

 Cirripede were found in, or in connection with, this flint. The 

 grounds, therefore, upon which these valves are associated in one 

 species are of a strength almost unique in the case of chalk forms. 

 Apart from this special series of associated valves it should also 

 be mentioned that B. fallax is by far the most abundant species of 

 Cirripede in the Trimmingham Chalk, but the majority of the 

 specimens I have met with are more or less damaged." 



In M. Bosquet's memoir, we find in addition to the scutum and 

 tergum (figured both by Bosquet and Darwin) those of the carina, 

 rostrum, sub-carina, sub-rostrum, the upper latus, and seven of the 

 lesser latera carefully figured and described. As these same valves 

 occur in the Trimmingham Chalk, with scuta and terga identical with 

 those figured by Darwin and Bosquet, and referred by them to 

 P. (Mitella) fallax, I give here the description of the additional 



