part 1] or the shales-with-' beef.' 77' 



statement l that the genetic connexion of the Middle Lias ' Cym- 

 bites , globosus with the group of ' Agassiceras ' Icevigatum seems 

 evident cannot now be accepted, and Pompeckj's proposal to- 

 include in a polyph.vletic genus ' Cymbites ' all the forms from 

 Dumortier's Ammonites Icevigatus (non Sowerby) of the angulata 

 zone, up to the externally similar species of the Middle Lias, is 

 equally objectionable. 



It even seems probable that the presumed earliest ' Cymbites? 

 namely, the form figured by Dumortier, 2 like Ammonites semi- 

 costulatus (Keynes) Warmer, 3 is only a homceomorphous develop- 

 ment of a Caloceratid stock, wherefore a different generic name 

 (P rotoc ymbites) becomes necessary, the genotype to be W aimer's 

 Alpine form (P. WjEHNeri, nom. nov.) with ornamentation different 

 from that of Cymbites. I may here add that I would include in 

 the family to which Protocymbites belongs, namely Caloceratidse 

 (ex Psiloceratidse), also the new genera Paracaloceras nov. 

 [genotype : Arietites coregonensis (Sowerby) Wanner 4, of horizon 

 a 3] and Pseud^etomoceras nov. [genotype: Arietites abnormilo- 

 batus Warmer 5 ] as well as the genus Tmcegoceras of horizon a 2-3, 

 all of which resemble later true Arietids. This genus Tmcegoceras 

 of course has nothing to do with the Hildoceratid genus Leulca- 

 diella, nor have the other Hildoceratid genera Prechiella, 

 Achilleia, and Paroniceras any connexion with Arietites or 

 Agassiceras, as Carl Renz 6 thinks. 



Cymbites, then, is a simplified development of an Arietid stock 

 (' Epamioceras''), and characterizes the lower part of Oppel's 

 original obtusus zone. Buckman's family Cymbitidse, 7 which, 

 besides Cymbites (by him considered to be an ' anamorph,' not a 

 'catamorph') includes two Hildoceratids (Frechiella and Paroni- 

 ceras), and one Grammoceratid (Hudlestonia) must be rejected. 



Cymbites Icevigatus (Sowerby) occurs in the brooki bed (74 d) 

 below, in the b irchi- tabular (76) above, and at one intermediate 

 horizon (74r), 9 feet below the birch z'-nodular bed. In the 

 Black Arnioceras Jj{raes,tox\e = Jiartmanni bed (74 f) 3 feet above 

 the brooki bed, among countless young and smooth Arnioceras of 

 the liartmanni group, at that stage close to Arnioceras nigrum 

 (Blake), and innumerable small Straparotlus that, at first sight, 

 might be mistaken for immature ammonites, only one minute 

 globose form of Cymbites (?) was discovered. 



In the brooki bed, Cymbites Icevigatus is associated with a 

 similar globose form (which is neither globosus a nor globosus ,3 



1 E. Haug-, Neues Jahrb. vol. ii (1887) p. 99. 



2 ' Etudes Paleontologiques sur les Depots Jurassiques du Bassin du 

 Kh6ne' vol. i (1864) p. 116 & pi. xviii, figs. 5-6. 



3 Beitr. Pal. (Est.-Ung. vol. iv (1886) pi. xxvii, fig. 12 only. 



4 Ibid. vol. vi (1888) pi. xxii (xli), fig. 1. 



5 Ibid. vol. v (1886) pi. xxiii (xxxviii), fig. 5 only. 



fi ' Neue Arten aus dem Hellenischen Jura, &c.' in ' Neuere Fortschritte 

 in der Geologie & Paliiontologie Griechenlands ' B, Zeitschr. Deutsch. Geol. 

 Gesellsch. vol. lxiv (1912) p. 600. 



7 'Yorkshire Type-Ammonites' vol. ii (1919) p. xv. 



