(iASTKIOCERAS. 93 



Septa of the usual gastrioceran type; ventral lobes naiTow and long-, 

 separated by a deeply notched siphonal saddle. Lateral lobe rather broad 

 and funnel-shaped. External and lateral saddles broadly rounded. The 

 second lateral lolie is not above the umbiliciis. Body chamber at least two 

 revolutions in length. 



Occurrence. — In black shale of the Coal Measures, presumably the 

 upper part, near Eberhai-dt Mill, White Pine, Nev. The type is deposited 

 in the U. S. National Museum. 



Gastkioceras listeri Martin. 

 PI. XIII, figs. 6-15. 



1809. ConchyllollfJnts XaufiHtefiAmmnni'frs {lister!), W. Martin. Petrif. Derb.. PL 



XXXV, tig. 3, and p. l(j. 

 1825. Ammonites listeri, J. Sowerby, Min. Conchol., Vol. V, p. 163, PI. Dl, fig. 1 



(right and left hand figures). 

 1832. Amnwnites listeri, L. von Buch, Phys. Abhandl. Berlin Akad. der Wissen- 



schaften for 1830, p. 175. 

 ?1833. Ammonites listeri, C. J. Davreux, Mem. Cour. Acad. Roy. Bruxelles, Vol. IX, 



p. 270, PL III, tigs. 1, 2. 

 1836. Gmiiatites listeri, J, Phillips, Geol. Yorkshire, Pt. II, p. 235, PL XX, figs. 1, la. 

 1812. Goniatites listeri, F. McCoy, Synop. Carb. Foss. Ireland, p. 11. 

 1812-11. Ammonites listeri (pars), L. G. de Koninck, Descr. anim. fos«., p. 577 



(excluding figures). 

 ?1855-57. Goniatites listeri, J. Kelly, Jour. Geol. Soc. Dublin, Vol. VII, p. 7. 

 1863. Goniatites listeri, F. Roemer, Zeitschr. Deutsch. Geol. GeselL, Vol. XV. 



p. 580 (excluding figures). 

 1881. Gastrioceras listeri, A. Hyatt, Proc. Boston Soc. Nat. Hist., Vol. XXII, p. 327. 

 1884. "■Ammonites listeri,'''' E. Beyrich, Zeitschr. Deutsch. Geol. GeselL, Vol. 



XXX\a, p. 213. 

 1888. Goniatites listeri, R. Etheridge, British Fossils, Vol. I, Paleozoic, p. 312. 

 1892. Goniatites striatus, G. Wild, Trans. Manchester Geol. Soc, Vol. XXI, p. 396, 



PL II, fig. 11. 

 1896. Go7iiatites listeri, H. Bolton, Trans. Manchester Micros. Soc, 1895, pp. 130. 



131, PL II, tig. 21. 



1896. Gastrioceras mar ianum, J. P. Smith, Proc Am. Philos. Soc, Vol. XXXV, p. 



260, PL XVI, figs. 1-5. 



1897. Gastriocerm listeri, Foord and Crick, Catal. Foss. Ceph. Brit. Mus., Pt. III. 



p. 233, tig. 111. 



1898. Gastrioceras listeri (pars), E. Haug, Etudes sur les Goniatites, p. 103. PL I, 



figs. 28-31. 



1899. Glypldoceras listeri, F. Freeh. Die Steiukohlenformation, PL XLVI, B, figs. 



2a-b. 



