disregarding the iatermediate and connecting links, some of which form an 

 absolute passage from the one to the other. 



Ammonites Aalestsis. 1. Aalensis, A. Aalensis, Zieten. 



2. costula, A. costula, Reinecke. 



3. regularis, A. regularis, Simpson. 



4. conaptuSf A. comptus, Reineclce. 



5. Moorei, A. Moorei, Lycett. 



Ammonites discoides, Zieten. The most discoidal and also one of the 

 most rare of the Frocester HOI species. 



Ammonites serrodens, Quenstedt, A. inornatus, Williamson, was briefly 

 described, but not figured by Professor Williamson in his well-known 

 memoir on the distribution of fossils on the coast of Torkshire ; specimens 

 of this rare form are in the Scarborough Museum, and in the collection of 

 J. Leckenby, Esq., of the same place, these are from the sands of Blue 

 Wick ; I also possess a single specimen from the upper bed of the Sands 

 at Frocester Hill ; it is sometimes upwards of a foot across, and not 

 altogether destitute of ornamentation, the younger specimens having some 

 broad depressed and obscure radii, in adult forms the lobes are much more 

 produced than in the figures given by Quenstedt. 



Ammonites Comensis, Buch, (variety). A single aged but fine example 

 from^the Upper Sands at Newmarket, near Nailsworth, is my authority, the 

 more advanced stage of growth will account for its large dimensions when 

 compared with the figures of Von Buch and Hauer ; at the utmost, however, 

 it can only be regarded as a variety of Comensis with a few large nodose 

 BweUings upon the inner border of the volutions, and large falciform costoe, 

 three or four to each swelling, much more curved than in the authorities 

 above quoted, a considerable proportion of the last volution is plain. The 

 Comensis of d'Orbigny is the striatulus of Sowerby. In Wurtemburg it 

 occurs in the same position in the Jurensis marls of Balingen. 



Ammonites Sircinus, Schlotheim. Only portions of this remarkable 

 Ammonite have hitherto been found at Frocester Hill ; in Wurtemburg it 

 occupies a similar position at Wasseralfingen and Heinengen ; in France 

 at Verpilliere (Isere). 



Ammonites LecTcenhyi, Lye, very rarely at Frocester Hill in the form of 

 casts, the test has probably radiating striations ; one of the examples of 

 A. torulosus figured by Quenstedt with unequal constrictions and without 

 dorsal ridges is our species ; its position in Wurtemburg is in the black 

 shales with Trigonia navis and Ammonites opalinus, higher than the 

 Frocester HiU. Sands. 



Ammonites Boulbiensis, Toung and Bird ; this is perhaps only a variety of 

 A. Lythensis, Y. and B., the general figui-e is alike in both cases, and also 

 the ornamentation of the surface ; the distinction consists in a flattening or 



