156 MR. L. BLCHA.KDSOX ON TILE [vol. lxxiv* 



characterized by an abundance of specimens of Zeilleria anglica 

 (Oppel), as seen at Drimpton — is not represented. 



Prof. S. H. Reynolds has very kindly examined microscopically 

 for me pieces of the Blue, Red, and Grey Beds. Concerning the 

 Blue Bed he states — 



' It is composed of a mass of finely-divided calcareous organisms with frequent 

 subangular quartz-grains. Crinoid ossicles are by far the most plentiful ; 

 but foraminifera are not infrequent. A good deal of the staining is due to 

 ferric oxide.' 



The Red and Grey Beds, are dated as Ancolioceras on the 

 evidence of the ammonites. 



' The Bed Bed is a non- oolitic rock of fine and uniform grain. It is composed 

 of crinoidal fragments, foraminifera, and many pieces of small molluscs - 

 gastropods and lamellibranchs — embedded in a calcite matrix, which is some- 

 times structureless and sometimes finely crystalline. Some of the fragments. 

 particularly of crinoids, are partly replaced or stained with ferric oxide.. 

 Many small quartz-grains occur.' [S. H. B.] 



The Grey Bed is also known to the quarrymen as the ' Cockle Bed, 1 

 on account of the large number of fossils that it contains. It is 



' a fine-grained gritty limestone. Crinoidal fragments form the bulk of the 

 rock. Small angular quart z-grains are very plentiful, but are irregularly 

 distributed.' [S. H. E.] 



As in the case of the equivalent bed in the Conegar-Hill section,, 

 the nether surface of the Grev Bed here is very irregular, and fits 

 into an equally irregular surface of the immediately subjacent 

 sand-rock of the Scissum Beds. 



Concerning this section H. B. Woodward wrote 1 that it shows 



* a few beds of the pale [Top] limestones belonging to the zone of A. Parkin- 

 soni ; lower down there were brown oolitic and ironshot limestones (2 ft. 2 in.) ; 

 and, at the base, hard, grey, shelly and oolitic limestones, yielding fine speci- 

 mens of Ceromya coiicentrica and also Gryphsea sublobata — the latter recalling 

 the Gryphite Grit of the Cotteswold Hills. 



'The same Gryphsea occurs also abundantly at Haselbury : and in both of 

 these Dorset* localities it is associated with Ammonites Murchisonse. It 

 occurs in higher beds near Bruton." f 



* The Misterton Limeworks and Haselbury are in Somerset. 



f I have recorded Gryphsea sublobata (Deslongchamps) from the rock of 

 shirbuirnise hemera at Sunny Hill. Cole, near Bruton. See Q. J. G. S. vol. lxxi 

 (1915-16) p. 498. 



The Gryphcea mentioned by H. B. Woodward as occurring at 

 Misterton and Haselbury is doubtless the form called ' Ghyphma 

 cygnoidcs ' by Whidborne. 3 . 



Lecker- Bridge section. — Near Lecker Bridge (-1), South 

 Perrott (Dorset), rock of garantiance hemera — similar to its equi- 

 valent at the Misterton Limeworks — is seen resting on sandstones, 

 the date of the highest portion of which I have been unable to 

 ascertain ; but it is either Ancolioceras or scissi. 



1 ' The Jurassic Bocks of Britain, vol. iv — The Lower Oolitic Bock- of 

 England (Yorkshire excepted) ' Mem. Geol. Surv. 1894. pp. 68-69. 

 - Q. J.G. S. vol. xxxix (1883) p. 494 & pi. xv, figs. 8-8 a. 



