INOCERAMUS. 29.1 



Affinities. — Inoceramus nasutus, Wegner, 1 from the Senonian of Bossendorf and 

 Diilmen, is allied to I. lobatus. See also /. lingua, I. cardissoides,&nd I. tuberculatus 



(below). 



Remark*. — Only imperfect casts of this species have been seen, but it is 

 abundant in Yorkshire. In North Germany this species occurs also in the zone of 

 Marsupites testudinarius. 



Type. — From the Lower Senonian of Qnedlinbnrg. 



Distribution. — Zone of Actinocamax quadratus of Sewerby, Bessingby and 

 other localities in Yorkshire. 



Inoceeamus lingua, Goldfuss, 1836. Text- fig. 56. 



1836. Inockramus lingua, A. Goldfuss. Petref. Germ., vol. ii, p. 113, pi. ex, 



fig. 5. 

 1877. — — C. Schliiter. Palaeontographica, vol. xxiv, p. 276, 



pi. xxxix, figs. 3, 4. 



1898. — — O. Miiller. Mollusk. TJntersen. v. Braunschweig, u. 



Ilsede (Abhandl. d. k. prenss. geol. 

 Landesanst., n.f., 25), p. 45, pi. v, 

 fig. 8. 



1899. — — V. Popovici-Hatzey. Mem. Soc. geol de France, Paleont., 



vol. viii, pt. 3, p 7. 

 1902. — /. P. /. Bavn. Mollusk. Daumarks Kridtafl., I. 



Lamellibr., p. 102. 

 19U5. — — T. Wegner. Zeitschr. d. deutsch. geol. Gesellsch., 



vol. lvii, p. 168. 

 1909. — /. Nowak. Bull. Internat. Acad. Sei. Cracovie, p. 875. 



Remarks. — This species is closely allied to /. lobatus, Goldfuss, but the speci- 

 mens at present available are not sufficiently perfect to enable me to make a close 

 comparison. /. lingua appears to differ from I. lobatus in the absence of the ridge 

 between the umbo and the postero-ventral angle, in the absence or indistinct 

 character of the radial depression in front of the ridge, in the greater relative 

 length of the shell, and in the ribs being either of uniform size or of two sizes less 

 distinctly marked than in /. lobatus. 



Type. — From the Senonian of Diilmen. 



Distribution. — Upper Chalk of Birdsall, Yorkshire. Zone of Belemnitella 



1 'Zeitschr. d. deutsch. geol. Gesellsch.,' vol. lvii (1905), p. 167, pi. x, fig. 3, text-fig. 8. 



