YORKSHIRE TYPE AMMONITES— II Mar. 



I, Zoological Analysis 



(Pis. I-CXXX. On the lines of the Synopsis, xvi) 



IV, 3, PSILOCERATIDM \{CALOCERATIDM) : Schlotheimia 38; 

 Caloceras 17, 18. 



IV, 2, LYTOCERATIDM : Fimbrilytoceras; 130; Alocolytoceras, 88 ; 

 Pleurolytoceras, 70. 



IV, 1, PHYLLOCERATIDM: Phylloceras, 34; Tragophylloceras 

 (Rhacoceras) , 16. 



Ill, 2, ASPIDOCERATIDM : Peltoceras, 99. 



PERISPHINCTIDM : Perisphinctes, 113. 



PACHYCERATIDM : Pachyceras, 115. 



OTOITIDJE: Otoites, 81. 



Ill, 1, DEROCERATIDM : Deroceras, 44, 64, 65, 71, 72, 82-84, 94> 

 95, 102-105 : Xipheroceras, 39 ; 



DACTYLIOCERATIDJE: Peronoceras, 30, 63; Porpoceras, 

 2 9> 5°> 57> 9°» 9 1 ; Dactylioceras, 31, 51, 58, 62, 68, 107 ; 

 Coeloceras ; 59, 60, 61, 69, 8q, 119. 



POLYMORPHIDM : Platypleuroceras, 3; Uptonia, 2, 21, 92; 

 Polymorphites, 53. 



II, OPPELIDM: Phlycticeras, 98. 



CADOCERATIDM : Vertumniceras, 116; Prorsiceras, 117; 

 Eboraciceras, 118 ; Quenstedtoceras, 118 ; Longarviceras, 121 ; 

 Pseudocadoceras, 121. 



I, 3, AMALTHEIDM : Amaltheus, 1, 25, 109, 125. Amauroceras 

 (Amaltheus) 20 ; Paltopleuroceras, 22, 24, 52, 77 ; Defossiceras, 76. 



I, 2, LIPAROCERATIDM : Phricodoceras, 32, 33; Oistoceras, 26, 

 27, Anisoloboceras (Mgoceras), 37 ; Liparoceras ; 108 ; Andro- 

 gynoceras, 45-48 ; Bifericeras ; 124, 127, 128 ; Beaniceras, 73, 

 123, 126, 129. 



I, 1, HILDOCERATIDfi : Harpoceras, 4, 5; Harpoceratoides, 9; 

 Ovaticeras, III, Tiltoniceras, 97 ; Elegantuliceras, 93, 106 ; 

 Eleganticeras, no ; Whitbyiceras, 80 ; Pseudogrammoceras, 79 ; 

 Pseudolioceras, 10-13, 41-43; Hildoceras 12, 114; Phymatoceras, 

 85 ; Haugia, 15 ; Denckmannia, 14 ; Seguenziceras, 74. 



ECHIOCERATIDjE : Echioceras, 19, 28, 49, 96; Parechioceras, 

 100, 101 ; Gagaticeras, 78, 122. 



AMMONITIDM [ARIETIDM) : Oxynoticeras, 7, 8, 36, 55, 56 ; 

 iEtomoceras, 66 ; Arietites, 35, 54, 67, 120 ; Agassiceras, 6, 75 ; 

 Arnioceras, 40, 112 ; 



CYMBITIDM: Frechiella, 23. 



