described as Cirripede Valves. 169 



Although there were more than twenty examples, all came apparently 

 from the same side of the animal, that is, they were not left and 

 right, and this led me to suspect that they were not Cirripede valves, 

 and to examine them more closely. One edge close to the narrow 

 end of the shell was then seen to be broken quite clean and straight, 

 and on comparing these fossils with some Pelecypod shells from the 

 same horizon it was quite clear that they were the anterior ears of 

 right valves oi Aucellina gryphcsoides (Sow.) (Text-fig. 7, p. 170), a shell 

 belonging to the faraih^ Pteriidee (see H. Woods, Pal. Soc. Monogr. 

 Cretaceous Mollusca, 1905, vol. ii, p. 72, pi. x, figs. 6-13). Other 

 specimens submitted at various times from Jurassic and Cretaceous 

 rocks, turned out on examination to be the anterior ears of the right 

 valves of Pelecypod shells like Pecten, and a number of such specimens 

 were included among some Cirripede plates from the Chalk of lliigen 

 obtained for the British Museum by Frau Agnes Laur. 



Since the superficial resemblance to Cirripedes of the anterior ears 

 of the right valves of Peeten-\\ke shells and other shell-fragments, 

 has resulted in their mistaken identification by collectors, even those 

 of experience, it is not surprising that some authors should have 

 described and figured such fossils as species of Cirripedia. 



Thus, Darwin has figured as a carinal-latus of the Cirripede 

 Scalpellum solidtdum, the anterior ear of a Pecten from the Cretaceous, 

 and a recent examination of the holotype of the supposed Liassic 

 Cirripede Pollicipes alatus, shows that this is another case of the 

 anterior ear of a Pelecypod being mistaken for a Cirripede valve. 

 One or two other instances have been noticed while going through 

 the Cirripede literature, and it was thought advisable to include them 

 in the present note, for this will serve not only to call attention to 

 these remains, but will be a further step towards ridding the 

 Cirripedia of all such non-Cirripede material. 



ZooCAPSA DOLTCHORHAMPHiA H. G. Secley. (Text-fig. 1, p. 170.) 



1870. Zoocapsa dolichorhamiihia, H. G. Seeley, Ann. Mag. Nat. Hist., ser. rv, 



vol. V, p. 283. 



1877. ,, ,, ,, { = Avicula or Pecten) : H. 



Woodward, Brit. Mus. Cat. 

 Brit. Foss. Crustacea, 

 p. 146. 



1891. ,, ,, ,, { = Avicula or Pecten) : H. 



Woods, Cat. Type Foss. 

 Woodwardian Mus. Cam- 

 bridge, p. 132. 



Since this fossil from the Lias of Lyme Pegis was described as 

 a sessile Cirripede by Professor Seeley, an examination of the type 

 was made by Dr. H. Woodward, who stated in his Catalogue (1877, 

 p. 146), " I am inclined to consider the ' tergum' to be the wing of 

 an Avicula or Pecten, and the underlying 'scutum' to be another 

 portion of the same shell." H. Woods (1891, p. 132) subsequently 

 recorded the fossil as " Avicula or Pecten". 



No figure has yet been given of this fossil, and only a very 

 inadequate idea of it can be deduced from the description. The 

 specimen really consists of seven or eight fragments of Pelecypod 



