ADDITIONS. 423 



ADDITIONS AND CORRECTIONS. 



AliCA, sp. [Vol. I, p .35] 



Internal casts of a species of Am/ liave l)ocii foiiiul in tlie zoiu' of BcJnnnUcUa 

 mucronata of Norwich. Two exani2)lcs are preserve 1 in tlie Norwich Museum (Nos. 

 2121, 2122). 



DiCRANODONT.V. [Vol. I, p. -53.] 



Species of Dicranodonttt have now been recognised by Borissjak' in the Jurassic 

 deposits of Russia. In connection with this genus or sul)gcuus the papers of 

 Solger - and Schmidt ^ should be consulted. 



Crenefxa oRBicuL.VRis {Soicerhi/), 18:56. Plate LXI, figs. 14—17. 



[Ouiitted from Vol. T, p. 105.] 



1836. LcrciNA ? obbiculaeis, J. de C. Soweihy. Trans. Geol. See, ser. 2, vol. iv, 



pp.241, 341, pi. xTi, fig. 13. 

 1850. LuciNA OEBicui-AKi.--, A. (V Orhi(j>tij. Prodr. de Pal., vol. ii, p. 162 (jtartim). 

 1854. — —J. Morris. Cat. Brit. Foss., ed. 2, p. 208. 



1866. — — F. J. ricfd and G. dimplcJie. Foss. Terr. CrJt. Ste. 



Croix (Matrr. Pal. Suisse, 

 ser. 5), p. 201. 

 1871. LuciNA? ORBICULARIS, J''. (S/o/(«/m. Palocoiit. ludica, Cret. Fauiia S. liidio, 



veil, iii, p. 252. 



Description. — Shell tliin, small, oval, higher than long, slightly inequilateral, 

 regularly convex, Avith rounded margins. Umbones pointed, with a small anterior 

 curvature. Lunule and escutcheon not defined. Ornamentation consists of numerous, 

 equal, regular, radial ribs which curve outwards from the median line of the valve 

 and are separated by narrow furrows. A few growtli-rings occur at intervals. 



' " Pelecypodeu Jura-ablager. EuropoDiscb. Russlaud. II Arcida-," ' Mem. Com. gi'ol.,' n.s., xix 

 (1905), pp. 29—32, 58-60, pi. iv, figs. 5—13. 



* "Ueber Pseudociicnll.-ra, cinen iieuen Taxodontcntypus," 'Zeitscbr. d. deutsdi. geol. Gesellscli.,' 

 vol. Iv (1903), Monatsber., p. 76. 



^ Il)id., vol. Ivi (1904), Monafslvr.. p. 120. 



