described as Cirripede Valves. 171 



that he did not include as belonging to his supposed Cirripede, the 

 three shell-fragments unnumbered in the figure. 



]Not only did Professor Seeley found a new genus for these shell- 

 fragments, which obviously belong to different Pelecypods, but he 

 regarded them as belonging to a Cirripede which was the type of 

 a new family intermediate between the Balanidse and Verrucidse, 

 with peculiar affinities towards tlie Lepadidse. A Cirripede valve is 

 a well-formed structure, and in no way resembles the fragmentary 

 portions of shell in this fossil. 



PoLLicirEs ALATXJS R. Tate. (Text-fig. 2, p. 170.) 



1884. Pollicipes liassicus, K. Etheridge, Quart. Journ. Geol. See, vol. sx, 



p. 114 (nomen nudum). 

 1870. P. alakis, E. Tate, Appendix I to Ann. Eep. Belfast Nat. F. C, p. 23, 

 pi. i, fig. 6. 



This shell-fragment, which came from the Lower Lias "A. angu- 

 latus'' zone of Island Magee, Antrim, was originallj^ noticed by 

 R. Etheridge as a scutum of Pollicipes, and although he gave neither 

 description nor figure, he proposed for it the name Pollicipes liassicus. 



R. Tate subsequently described and figured it as a scutum of 

 Pollicipes under the new name P. alatus. He remarked — " The 

 single scutal plate here figured is the one to which Mr. Etheridge 

 applied* the MS. name of P. liassicus ; hwt, as another species was 

 described by Dunker Avith a similar denomination, P. liasimis,'' it 

 appears to be advisable not to adopt Mr. Etheridge's pi'ovisional 

 name. I, therefore, have selected that of P. alatus.'" 



The holotype of P. alafus is now in the Greological Survey Museum, 

 Jermyn Street, registered 28849. Examination has shown that it is 

 not a Cirripede valve, but merely the anterior ear of a right valve of 

 a Pecten. Dr. F. L. Kitchin, who kindly examined the specimen to 

 see if the species could be determined, made the following 

 confirmatory report: "The type of Tate's Pollicipes alatus is 

 iindoubtedly the anterior ear of a right valve of a Pecten. I can 

 only say that it belongs to one of the smooth Pectens that have been 

 commonly ascribed to P. calvus, Goldf uss. Goldfuss only figured left 

 valves, and I am not absolutely sure that any of the specimens in 

 this museum ascribed to his species are truh^ identical with it. But 

 Tate and others have referred certain smooth forms from the 

 angulatus and overlying zones to this species, and in the absence of 

 an exhaustive enquiry based on much material it is usual to adopt 

 this pi'ovisional naming. It is not unlikely that more than one 

 species has been thus determined among our British material, but it 

 is to one of these that the supposed Po///ajt?(?s belongs. The specimen 

 is such a fragment that a precise determination of species is scarcely 

 to be hoped for." 



In a paper "On a New Species of Pullicipes from the Inferior 

 Oolite of the Cotteswold Hills", Geol. Mag., 1908, p. 351, 



^ The name Pollicipes liasinus was given by Dunker (1848, Palceontographica, 

 Bd. i, p. 180, pi. XXV, fig. 14) to a supposed tergumfrom the Lias of Halberstadt, 

 and although the figure is not at all like that of a tevgum of a Cirripede, an 

 examination of the specimen ^Y0uld be necessary before one could give an 

 opinion as to its nature. 



