212 J. P. BLAKE ON THE KDOtEKIDGE CLAY OF ENGLAND. 



Astarte supracorallina, D' Orb. 

 Pecten Thurmanni, Cont. 

 Anomia Dollfusii, Bla. 



Corbula Deshayesia, Buv. 

 Area mosensis, Buv. 



rhoinboidalis, Cont. 



Nucula Menkii, Bom. 



The clays that were dug from the deep cutting between Wootton 

 Bassett and Swindon exhibit the same fossils, and therefore belong 

 to the Lower Kimmeridge, though here the passage-beds (to be pre- 

 sently described) were also cut through. The species belonging to 

 this zone not mentioned by Phillips are : — 



Ammonites decipiens, Sow. 

 Eissoa mosensis, Buv. 

 Corbula Deshayesia, Buv. 

 Astarte ovata, Sow. 



Nucula obliquata, Bla. 

 Area mosensis, Buv. 



rustica, Cont. 



Avicula aedilignensis, Bla. 

 'Thracia depressa, Sow. 

 Ostrea solitaria, Sow. 



Michaudiana, B' Orb. 



Mactromya rugosa, D' Orb. 

 Pecten Grenieri, Cont. 



Thus, though there is considerable variation in lithological characters, 

 the fauna of this Lower Kimmeridge is everywhere fairly comparable 

 with that of Lincolnshire. I cannot record Amm. serratus from per- 

 sonal observation; but Prof. Phillips records it from Minety under 

 the name of Amm. sujperstes. 



"We come now again to the coast-section as exhibited at Eingstead 

 Bay ; and here in a short space seem to be repeated the regional 

 features that are traced in the various Lincolnshire pits. 



If we start from the east or upper end, and collect the fossils, we 

 come first to thick masses of blue clay, with the following charac- 

 teristic fossils : — 



Ammonites cymodoce, _D' Orb. 

 Cerithmm forticostatum, Bla. 

 Astarte Michaudiana, D' Orb. 



regularis, Cont. 



Nucula Menkii, Bom. 

 Corbula Deshayesia, Buv. 

 Cardium eduliforme, Et. 

 Lingula oralis, Sow. 



Anatina minuta, Bla. 

 Cyprina cyreniformis, Bla. 

 Pecten Grenieri, Cont. 

 Thracia depressa, Sow. 

 Pleuromya tellina, Ag. 

 Exogyra virgula, Desk. 



nana, Sow. 



Ostrea solitaria, Sow. 



Further east we meet with the dogger blocks of Langton, &c, 

 with Amm. serratus, Belemnites nitidus, Trigonia Juddiana, and 

 Cardium striatidum, then black clay, with numerous Ostrea deltoidea, 

 as at Woodhall Spa, and below this the sandy beds of Worlaby, with 

 numerous large Lingula ovalis, and Amm. bipleoc ?, Thracia depressa, 

 and Cerithium crebrum. 



This succession cannot be so well traced on the west of Weymouth, 

 where the whole exposure consists, except quite at the base, of un- 

 distinguishable blue clays. Here Ostrea deltoidea, though chiefly 

 found near the base, is scattered through the clays, and Amm. serratus, 

 if present, must be very rare ; it has not occurred to me in any of 

 the doggers such as usually enclose it. Its rarity in this locality 

 may have made Dr. "Waagen call these clays Middle Kimmeridge. 

 They contain, however, a varied suite of fossils such as are asso- 

 ciated elsewhere with that Ammonite. There is a remarkable bed 

 of Thracia depressa near the base. The fossils here obtained are : — 



