via YORKSHIRE TYPE AMMONITES Oct. 



Genus, TRAGOPHYLLOCERAS, Hyatt 

 1900, Ceph.; Eastman-Zittel, Pal. I, 568. 



" Tragophylloceras, gen. nov. Type T. (Phyl) heterophyllus nnmis- 

 malis, Quenst. sp. " This includes several forms : there may be selected 

 Amm. Schwab. Jura, xxxvii, 11. Pompeckj, 1893, 14, placed this, and 

 others as Phylloceras numismale, Quenstedt sp. The types of that, 

 however, are Quenstedt, Ceph., 1846, vi, 4, 5a, b, 5c, of which it is advisable 

 to choose 5a, b as type of Tragophylloceras numismale, Quenstedt sp. 



Result 



Genus, Tragophylloceras, Hyatt, 1900. Genolectotype, Am. 

 heterophyllus nnmismalis, Quenstedt, Amm. Schwab, xxxvii, 11, only, 

 = Tragoph. typicum, nom. nov. 



Genus, PHRICODOCERAS, Hyatt 



igoo, Ceph.; Eastman-Zittel, Pal. I, 587. 



" Phricodoceras, gen. nov. Type P. (Amm.) Taylori, d'Orb. sp." 

 [Ceph. Jur. cii, 3 — 5]. Here are two species. Advisable to select 

 figs. 3, 4. 



Result 



Genus, Phricodoceras, Hyatt, 1900. Genolectotype, Am. taylori; 

 d'Orbigny, Cii, 3, 4. 



Genus, UPTONIA, S. Buckman 



1898, Jur. Time; Quart. Journ. Geol. Soc. LIV, 453. 



"Type : Uptonia Jamesoni (J. de C. Sow.)." But the identification 

 is general, not particular. Advisable to fix Aegoceras jamesoni ; Wright, 

 Mon. 1882, LI, I, 2, as type. 



Genus, PALTOPLEUROCERAS, S. Buckman 

 1898, Jur. Time; Quart. Journ. Geol. Soc. LIV, 453. 



"Type: Paltopleuroceras spinatum {Rrngmhre)." But the identifica- 

 tion is general, not particular ; and interpretations of Bruguiere's species 

 are various. Advisable to adopt for type of genus d'Orbigny's reading, 

 whether it is exactly Bruguiere's species or not. 



Result 

 Genus, Paltopleuroceras, S. Buckman, 1898. Genolectotype, 

 Am. spinatus, Bruguiere, d'Orbigny's interpretation, Ceph. Jur. lii. 



