T. H. Withers — TJie Cirripede Brachylepas cvetacea. 323 



Distribution of Brachylepas Naissanti. Upper Senonian, zone of 

 Belemnitella mucronata : Catton, near Norwich, jS"orfolk ; Edward's 

 Pit, Mousehold, near Norwich, ^Norfolk ; "Weyhourne and Trimiugham, 

 Norfolk ; Whitway Farm Pit, South Dorset ; Isle of Wight ; Meudon, 

 France ; Isle of liiigen ; Haldera, Westphalia ; Liineburg, Hanover ; 

 Scania, Sweden ; Simbirsk, Hussia. 



Brachylepas Naissanti, Hebert, sp. (Plate XX. ^) 

 1827. Belemnites mavimillatus (maxilla inferior), S. Nilsson, Petrificata 



Suecana, pp. 9, 10, pi. ii, figs. 2d. 

 1855. Emarginula (?) Naissanti, Ed. Hebert, Mem. See. geol. France, 2'=ser., 



vol. V, p. 374, pi. xxix, fig. 10. 

 1866. Pyrgoma cretacea, H. Woodward, Eep. Brit. Assoc. (1865), p. 321. 

 1868. P. cretacea, Woodward: H. Woodward, Geol. Mag., Dec. I, Vol. V, 



p. 258, PL XIV, Figs. 1, 2, 2a. 

 1873. Nautilus sp. (beaks of), J. I. Lahusen, Fossils of the White Chalk of 



Simbirsk ; Jubilee Volume of the Imperial Eussian Mining-Corps 



Institute, pt. ii, p. 264, pi. vi, figs. 8, 9. 

 1873. Pollicix^es sp., J. I. Lahusen, op. cit., p. 270, pi. vi, figs. 15a, h. 

 1877. Pyrgoma cretacea, Woodward : H. Woodward, Brit. Mus. Cat. Brit. 



Foss. Crustacea, p. 141. 

 1880. Pollicijjes cancellatus, Th. Marsson, Cirrip. d. Weiss. Schrieb.-Kreide 



d. Eiigen, p. 24, pi. ii, fig. 7. 



1880. 'iP.fallax, Darwin : Th. Marsson, op. cit., p. 22, pi. ii, fig. 6. 



1881. P. cancellatus, Marsson : W. Dames, Neues Jahrb., Bd. ii, p. 419. 

 1883. P. Icevissimus, F. A. Quenstedt, Handb. der Petrefaktenkunde, Abth. ii, 



p. 467, pi. 37, fig. 13. 

 1885. P. IcBvissimus, Quenstedt: K. A. Zittel, Handb. der Palaeontologie, 

 Bd. i, Abth. h, p. 534, fig. 723. 



1901. Brachylepas cretacea. Woodward, sp. : H. Woodward, Geol. Mag., 



Dec. IV, Vol. VIII, p. 150, PI. VIII, Figs. 3, 4a, &, pp. 240, 528. 



1902. Pollicixoes cancellatus, Marsson : A. Wolleman, Abh. k. preuss. geol. 



Landesanst., N.F., Hft. xxxvii, p. 114. 

 1906. Brachylepas cretacea. Woodward, sp. : H. Woodward, Geol. Mag., 



Dec. V, Vol. Ill, p. 337. 

 1906. B. cretacea. Woodward, sp. : J. Boehm, Centralbl. f. Min., p. 449. 



Some time ago I was able to obtain a carina, now referred to 

 Brachylepas Naissanti, embedded in a piece of bluish-grey marly 

 chalk, said to have come from the "chalk with Belemnites mucronatus 

 at Liineburg, Hanover". To see certain points of structure it was 

 necessary that the inner surface of the valve should be exposed, 

 and the valve was consequently removed from its matrix. When on 

 the point of throwing the matrix away, it was thought, since it was 

 very marly, that it would be easy to wash for Foraminifera. After 

 soaking the chalk, the dirty water was poured off, and to my 

 astonishment a large number of Cirripede valves appeared. Indeed, 

 it seemed impossible that such a small piece of chalk could have 

 completely hidden them. The valves consisted of three nearly perfect 

 carinas with several fragments, two nearly perfect rostra Avith portions 

 of others, nine scuta, thirteen terga, five upper latera, all more or less 

 perfect, and about 120 valves of the lower whorls. It is quite 

 possible that had the presence of further valves in the matrix been 

 suspected at first, at least one more or less complete capitulum could 

 have been obtained. This is not at all unlikely, since it was possible 



^ Plate XX will appear in the August Number. 



