28 Mr. De la Beche on the Lias of the Coast, 



Ammonites fimbriatus ; T. 164. Ammonites Birchii ; T. 267. 



obtusus ; T. 167. Konigi ; T. 263. 



armatus ; T. 95. Bechei ; T. 280. 



Bucklandi ; T. 130. Davcei ; T. 330. 



planicostatus ; T. 73. ellipticus ; T. 92. 



Greenovii ; T. 132. Belemnites^ common and 



Henleii ; T. 172. fusiform varieties. 



Loscombi ; T. 183. Orthocera elongata*. PI. IV. fig. 4. 



Brookii ; T. 190. of tliis volume. 



Univalves not chambered. 



Trochus anglicus; Sowerby. Tab. 142. Helicina expansa ; T. 273. 



imbricatus ; T. 272. fig. 3. Melania. 



Turbo. 



Irregular Univalves. 



Serpula. — This is a rare fossil in the lias : but I possess a specimen, changed 



into pyrites, adhering to a belemnite. 



Bivalves. 



Gryphaea incurva; — Sowerb.Tab. 112, Plagiostoma gigantea ; T. 77. 



Avicula inequivalvis ; T. 244. Astarte. 



Pinna. Pecten. 



Ostrea. Terebratula crumena; T. 83. fig. 3. 

 Spirifer Walcotti ; T. 377. ornithocephala; T. 101. 



Modiola Scalprum ; T. 248. fig. 2. Nucula. 



Hillana; T. 212. fig. 2. Cytherea. 



CucuUaea. Lucina ? 



Unio ? CrenatulaPf 



Echini. 



This family is very rare in the lias formation : the specimen represented in 

 PI. IV. fig. 5, is from the lias marl. I have seen also another species, but 

 the specimens are not sufficiently distinct to be accurately classed. 



* I have ventured to class this specimen as an Orthocera, as it possesses more of the character 

 of that genus than of the Belemnite, the external shell not exhibiting the radiating fracture of the 

 latter ; and I have given it a specific name from its great length in proportion to the diameter. 

 Mrs. White, to whom I am indebted for the specimen, informs me that it was originally con- 

 siderably longer than at present. 



t Besides the shells mentioned in the preceding list, numerous casts occur, which evidently 

 belong to genera distinct from those above enumerated. 



