AEGOCERAS PLANICOSTA. 



335 



near Cheltenliam, in a ferruginous marl, belonging to the AmaUheus oxynotus-zom, and 

 from beds of the same horizon at Gloucester, obtained during the excavations made 

 for the new docks. It certainly is not found at Lyme Regis, and is unknown in 

 Yorkshire. Professor Quenstedt's original specimens were collected from the upper region 

 of Lias )3 at Balingen, Ofterdingen, Betzingen, Wiirtemberg. There this Ammonite is 

 associated with Belemnites acutus, Mill ; Leda Bomani, 0pp. ; Mytilm minimus, Sow. ; 

 Plicatula ventricosa, Goldf. ; GryphcBa oUiqua, ^o^.; Ehynchonella oxynota, Q,\xex\?,i. ', 

 according to Dr. Oppel (' Juraformation,' p. 54). 



Aegoceras PLANICOSTA, Sowerby. PI. XXIV, figs. 1 — 8 ; PI. XXV, figs. 1 — 3 

 Ammonites planicosta, 



Sowerby. Mineral Conchology, vol. i, p. 167> 



tab. 73, figs. 1—5, 1814. 

 Lamarck. Anim. sans Vertfebres, t. vii, p. 638, 



1822. 

 Young and Bird. Yorkshire Coast, p. 248, pi. 13, 



fig. 6, 1822. 

 He Haan. Monogr. Ammonit, et Goniatit., p. 92, 



No. 26, 1825. 

 Toung and Bird. Yorkshire Coast, p. 259, 1828. 

 Zieten. Versteinerungen Wiirttembergs, p. 6, tab. 5, 



fig. 2, 1830. 

 Voltz. Jahrbuch f. Min. Geol., p. 272, 1830. 

 Zieten. Versteinerungen Wiirttembergs, p. 6, tab. 4, 



fig. 8, 1830. 

 Von Buck. Ueber Ammoniten ; Abh. Berlin Acad. 

 d. Wissensch., pi. iv, fig. 4 (1830), 

 1832. 

 Boemer. Versteiner. Nord-Deutsch. Oolithen- 



Gebirges, p. 192, 1836. 

 Bronn. Lethsea Geognostica, p. 440, pi. xxiii, fig. 1, 



1837. 

 d^Orbigny. Paleontol. Fran9aise ; Ter. Juraasiques, 



p. 181, pi. 42, figs. 4—7, 1842. 

 Quenstedt. Flozgebirge Wiirtembergs, p. 158, 



1843. 

 d'Orbigny. Pal. Fran9aise ; Terr. Jurassiques, p. 

 325, pi. 103, 1844. 



— CAPEicoKNUS NUDUS, Quetistedt. Cephalopoden, p. 81, tab. iii,figs. 6 a, b, 



1849. 



— — _ _ Der Jura, p. 96, tab. 12, fig. 3, 1858. 

 Aegocekas PLANICOSTA, Neumayr. Zeitschrift der Deutsch.geol. Gesellschaft, 



p. 906, 1875. 



— LAXICOSTATA, 



— PLANICOSTA, 

 PlANITES PLANICOSTATDS, 



Ammonites — 



— ZiPHCS, 



— PLANICOSTA, 



CAPEICOENUS, 



— capeicoknus, 



planicosta, 



tceeilites coynaeti, 

 Ammonites capeicoknds, 



— dudressieri, 



