CLYDONICERAS HOCHSTETTERI. 55 



ton (2), Woodrow (1), Wilts (1), "Gloucester" (1), Holwell (1), Radipole (2). 

 In other words, they have not been found north of Lincoln, and in particular 

 none are known in Yorkshire. They would seem, therefore, to be dependent on 

 the presence of the Great Oolite series below, from the Ammonite fauna of which 

 they are probably a relic. Nevertheless they do not characterise any lower 

 portion of the Cornbrash, but where found are absolutely associated with the 

 Macroccplmlites. In the figure given by Lycett of his A. discus, from the Bradford 



Fig. 5. — Suture-lobes of Clydoniceras discus. 



Clay, we see the Clydonian characters imperfectly developed, and if these are 

 correct, the specimen is probably a forerunner of the Cornbrash form. 



Clydoniceras hochstetteri (Oppel). Plate VI, fig. 2. 



1858. Ammonites hochstetteri, Oppel, Jahresh. Wurtt. Verein., vol. xiri, p. 174, and Juraform., p. 473. 

 1862. — Oppel, Pal. Mitth., p. 147, pi. xlvii, figs. 2 and (?) 3. 



Type. — The only figures given are those of the sutures. In the text we 

 read: "The lobes are very simple, as in A. discus, but the side lobe has three 

 long-drawn-out teeth, whereas in A. discus there are more. The ribs in young 

 examples are broader and less crowded than in A. discus and die out also sooner." 

 In Oppel's fig. 2 of the 'Pal. Mitth.' it is seen that the side lobe has one bifid 

 tooth and one single one. From the Cornbrash of the neighbourhood of Chippen- 

 ham. The suture drawn in Oppel's fig. 3 is from a specimen obtained at Lochen, 

 near Balingen, which may or may not belong to the same species, but it is not the 

 type. 



Description. — The figured specimen (PI. VI, fig. 2), though only a cast, shows 



