282 CRETACEOUS LAMBLLIBRANCHIA. 



1872. Inoceramus labiatus, II. B. Golnilz. Das Elbthalgeb. iu Saclisen (Pal- 



a3outo<i,i-apliica, vol. xx, pt. 2), 

 p. 46, 1)1. xii, fi^'s. 1 — 3. 



1873. — . — Geinifz. Neues Jahrb. fiir Min , etc., p. 13. 

 1877. • — — C. ScJiI liter. Palseoiitogra^jhica, vol. xxiv, p. 262. 



— — — A. Fritscli. Stud, im Gebiete der boliin. Krcide- 



format. ii, Weissenberg. u. Malnitz. 

 Scliicht., p. 130, fig. 112. 

 ? 1888. — — S. Nil-iliii. Les Vestiges Cn't. Euss. ceutrale 



(Mem. Comite gc'ol. Euss., vol. v, 

 no. 2), p. 34, pi. 5, figs. 10, 11. 

 1888. — —A. Peron. Hist. Terr, de Craie dans le S.E. du 



Bassin Anglo-Parisien, p. 158. 

 1893. — — Ji'. Michael. Zeitsclir. der deutscli. geol. Gesollscli., 



vol. xlv, p. 241. 



— — -- T. W. Stanton. The Colorado Formation (Bull. 



U.S. Geol. Surv., No. 106), p. 

 77, pi. x, fig. 4 ; pi. xiv, fig. 2. 

 ? 1897. — — -K. Leonliaril. Kreideformat. in Oberschles. (Pal- 



seoutograpliica, vol. xliv), p. 48. 

 1903. — — W. Petraschecl: Jabrb. d. Ic. k. geol. Eeichsaust., 



vol. liii, p. 156. 



? Non 1868. — MYTihOiiyES, E. EicJiwald. Letlisea Eossica, vol ii, p. 492, pi. 



xxi, fig. 6. 

 — 1881. — (Mytilites) problematicus, B. Etheridcje. In Penning and 



Jukes-Browne, Geol. Cambridge, 

 p. 143, pi. iii, figs. 9— 11. 



Description. — Shell mytiliform, nearly eqiiivalve, extremely inequilateral, 

 oblique, mucli elongated between the umbo and the postero- ventral extremity, 

 convex, with a small posterior ear ; antero-dorsal part sloping steeply and some- 

 times concave. Angle formed by the hinge with the antero-dorsal margin about 

 90°. Umbones terminal, with a slight anterior curvature. Anterior margin gently 

 curved ; postero-ventral extremity very convex ; posterior margin nearly straight. 



Ornamentation consists of small, fairly regular concenti-ic undulations, which 

 have an unsymmetrical curvature in the young, but become more nearly symmetrical 

 in older specimens. On the old parts of the shell the undulations become less 

 distinct. 



Affinities. — It seems probable that this species is related to 7. Crijijm vnr. 

 reochensis (p. 278), but the height of the shell is relatively greater, the length of 

 the hinge-line is less, and the direction of growth is oblique to the hinge-line. 



I. propinquus, Goldfuss,^ from the Quader-sandstone of Schandau, was regarded 

 by Geinitz as a synonym of 7. Jnhiatio^. 



1 ' Petref. Germ.,' vol. ii (1836) p. 112, ]>!. cix, fig. 9. 



