29G CRETACEOUS LAMELLIBRANCHIA. 



I. regularis, d'Orbigny, 1 differs from I. balticus in tlie outline of the shell, in its 

 uniform convexity, and in the broader and less sharp ribs. 



Some of the forms from Gosau referred by Zittel to 7. Grippsi resemble closely 

 I. balticus? 



Type. — From the Lower Quadra his beds of Dulmen, in the Palseontological 

 Institute of the University of Bonn. 



Distribution. — Senonian of Haldon, and Worbarrow Bay (Dorset), and Brighton 

 (probably zone of Marsupites testudinarius) . Zone of Actinocamax quadratus of 

 Mottisfont, Ropley (Hants), East Harnham (Salisbury), Mount Pleasant near 

 Andover, Driffield, and Sewerby (Yorkshire). Zone of Belemnitdla mucronata of 

 Clarendon and Fareham (Hants), Alum Bay and Shide (Isle of Wight), and Norwich. 



Inoceramus lobatus, (told fuss, 1836. Text-figs. 5I-, 55. 



' 1836. Inoceramus lobatus, A. Goldfuss. Petref. Germ., vol. ii, p. 113, pi. ex, 



fig. 3. 

 1877. — — C. ScJd iiter. Palaeontographica, vol. xxiv, p. 275, 



pi. xxxix, figs. 1, 2. 

 1882. H. Schroder. Zeitschr. d. deutscb. geol. Gesellsch., 



vol. xxxiv, p. 272. 

 ? 1888. i.ff. lobatus, S. Nikitin. Los Vestiges Cret. dans la Russie 



Centrale (Mem. Comite Geol., 

 vol. v, no. 2), p. 34, pi. v, fig. 12. 

 lobatus, G. Mailer. Jahrb. d. k. preuss. geol. Landesanst. 

 fur. 1887, p. 415. 

 1889. — E. Hohapfel Die Mollusk. Aachen. Kreide (Palae- 



ontographica, vol. xxxv), p. 223. 

 ? 1894. aff. lobatus, K. Jimhd. Kreideformat. v. Hokkaido (Pal- 



seont. Abhandl., vol. vi), p. 44, 

 pi. viii, fig. 11. 

 1898. lobatus, G. Midler. Mollusk. Untersen. v. Braunschweig, u. 



Ilsede (Abhandl. d. k. preuss. geol. 

 Landesanst., n.f., 25), p. 43, fig. 10. 

 ? 1901. — cf. lobatus, F. Sturm. Jahrb. d. k. preuss. geol. Landesanst. 



fur 1900, vol. xxi, p. 93, pi. x, fig. 3. 

 1902. lobatus, A. Wollemann, Li'meburg. Kreide (Abhandl. d. k. 



preuss. geol. Landesanst., n.f., 37), 

 p. 71. 



1 'Pal. Franc. Terr. Cret,,' vol. iii (1846), p. 516, pi. ccccx. 



2 Compare also I. Cripsi var. sulcata, Eomer, 'Kreidebild. v. Texas' (1852), p. 56, pi. vii, fig. 2, 

 and I. Cripsianus, Stoliczka, ' Palseont. Inclica, Cret. Fauna S. India,' vol. iii (1871), p. 405, 

 pi. xxvii, figs. 1 — 3 ; pi. xxviii, fig. 2, and J. crassus, Petrascheck, 'Jahrb. d. k. k. geol. Keicbsanst.,' vol. 

 liii (1903), p. 164, pi. viii, fig. 4, and Andert, ' Inoceramen d. Kreibitz-Zittauer Sandsteingeb.' (1911), 

 p. 46, pi. iii, fig. 4, pi. vi, figs. 1, 2. 



