I860.] WRIGHT HAS AND BOXE-BED. 391 



Litiiology. Organic Remains ; and the Local 



No. ft. in. Names of Beds. 



17. Dark-coloured limestone 4 The "Black stone," used for large 



paving-slabs ; some of them 10 ft. 

 by 5 ft. Modiola minima, Ostrea 

 liassica, Myacites, and lihynchonella 

 variabilis. 



18. Dark-blue shale 2 Ostrea lias&ica and Modiola minima. 



10. Hard greyish limestone " Six-inch building-stone." Crromi/a, 



Modiola minima, and Ostrea liassica. 



20. Soft bluish shale 2 



21. Greyish-blue limestone 4 "Four-inch building-stone." Fossils 



as in Xo. 19. 



22. Dark -grey laminated sbale ... 4 Ickthyosaurus intermedins and I. tenui- 



rostris. 



23. Hard blue limestone 1 " The Blue Clog," or "One-foot build- 



ing-stone," used for steps. Ceromya, 

 Ostrea, Modiola, and HhynchoneUa. 



24. Grey laminated shale 1 3 Saurians abundant ; Ichthyosauri'* in- 



termedins and I. tenuirostris, now 

 in Mr. Seymour's possession. Pho- 

 lidophorus leptocephalus, Agass. 



25. Greyish limestone 1 " Grey Clog." A valuable building- 



stone, and used for steps, troughs, 

 &c. Modiola mini ma. 

 2G. Dark shale 2 



27. Thin-bedded limestone 3 "Three- inch blue bed." Fish-remains, 



Modiola minima, and Otopteris acu- 

 minata, L. & II. 



28. Thick blue limestone 5 



29. Hard fine-grained limestone . 4 "Fire-stone." 



30. Hard, grey, fine-grained lime- Plesiosaurus Etheridgii. (In the Jer- 



stone 4 myn Street Museum ; and another 



is now in Street from this bed.) 



31. Hard grey limestone, forming "Fire-stone, bottom bed." Plesiosau- 



the bottom bed 1 rusHawkinsii. [The large Pies, me- 



gacephalus, Stutch., now in the Bris- 

 tol Institution, was obtained from 

 the lower beds near Street.] 



The Saurian beds near Langport have likewise yielded Reptilian 

 remains. I have obtained two fine specimens of Ichthyosaurus in- 

 termedins and an imperfect specimen of /. tenuirostris from this 

 locality, which arc now in the collections of private friends. In con- 

 nexion with those Saurian beds of Somerset, it is important to note 

 that the oldest Enaliosauria of the Lias are Plesiosauri, for Plesio- 

 saurus HawJeinsii, Owen, and PI, Etheridgii, Huxley, were both 

 exhumed from the 4-inch firestone, forming the bottom bed of Mr. 

 Crec's quarry at Street. The remarkable Plesiosaurus megaeephaZus, 

 Stutch., now in the Bristol Ifuseum, was found likewise in the 

 firestones of a quarry near Street Fosa : and it will be Bhown in my 

 Bcction of the correlative beds of this zone at Wilmoote, in Warwick- 

 shire, that the line skeleton of Plesiosaurus megacephalus contained 

 in the Warwick Museum was exhumed from the •• Breetonee " of thai 

 locality. — beds which arc the precise equivalents of the " Brest 



of Street. 



The small number of Conchifera hitherto found in these heds is 

 very remarkable. Osti\a liassica, StriokL, 0, irregularis, Qoenst.) 



