INFERIOR OOLITE OP DORSET AND SOMERSET. 



03 



This is not uncommon with the termination both near Sherborne 

 and at Bradford Abbas. 



These three last species are admirably figured by D'Orbigny ; and 

 yet we are happy to think that onr Dorset examples are quite up 

 to the perfection of the French ones. 



7. A. Martinsii, D'Orb. pi. 125. figs. 1, 2. 



Is not uncommon ; but the small specimen we have sent is the 

 only case in which we have observed the terminal lip. It seems to 

 have been the first lip formed ; and if fig. 3 of D'Orbigny' s plate 

 represents the lip of an older specimen, it would tend to show that 

 the lips vary very much with age. Our specimen is from Bradford, 

 where the species is not uncommon. 



8. A. SUBCOSTATUS, Buckman, MS. 



This shell, from near Sherborne, belongs to the discoid section of 

 Ammonites, and is therefore only placed here on account of its spa- 

 thulate termination, which differs so much from that of the shell 

 with which it has been confounded, namely A. subradiatus. 



Probably this is the A. subradiatus of D'Orbigny, T. J. pi. 113. 

 figs. 1 & 2. ; but if so it differs so much from his A. subradiatus 

 previously referrred to that we feel justified in proposing a fresh 

 name for it. Our specimen is the only example we have met with 

 with the termination : still it is not an uncommon fossil near Sher- 

 borne, though it occurs very sparingly at Bradford Abbas and Half- 

 way House. 



Fig. 4. — Termination of Ammonites Gervillii, Sow. 



9. A. Gervillii, Sow. p. 184, tab. A. fig. 3; D'Orb. pi. 140.. 

 figs. 1-7. (Pig. 4.) 

 This is a shell with a very curious and interesting termination, 

 which we have named delphinulate, because its side view is so much 

 like that of the head of the classic Dolphin. Sowerby says, "This 



