Yol. 50.] RH^TIC AND LIAS3IC OSTRACODA OF BRITAIN". 161 



Soc. vol. xlvii. (1891) p. 548, that supplies us with the best material 

 illustrating the particular Ostracodous forms under notice. 



Old exposures at Bedminster, near Bristol (Mr. Wilson informs 

 me), may have been a source for Darwinula liassica in former times, 

 for the same limestone as that occurring at Pylle Hill is evidently 

 referred to by the late Mr. W. W. Stoddard in his essay on the 

 Geology of the Bristol Coal-field, part v., in the Proc. Bristol 

 Nat. Soc. n. s. vol. ii. part 3(1879), pp. 280, 281, where he states : 

 " Immediately on leaving Bedminster we notice, on the left-hand 

 side of the road and just under the reservoir, a small well, on the 

 top of which is a thin bed of light cream-coloured limestone full of 

 remains .... of Naiadites petiolata," . . . and " valves of Estherice 

 and Cytheridce. Near, and behind a public-house, is a small quarry 

 in which is a whitish cream-coloured bed containing . . . valves of 

 Cytheridce in . . . abundance .... Eighteen inches above this is 

 the well-known Gotham marble " with Insects and Landscape-stone. 

 Remains of Insects and Entomostraca were found in a bed about 15 

 inches above the Cotham marble. Of the beds in this little quarry 

 Mr. Stoddard gives a detailed section, and Mr. Wilson refers them 

 to a higher zone than the JS r aiadites-bed above mentioned, which he 

 correlates with the Upper-Rhaetic bed ' I ' of his Pylle Hill section. 

 He thinks that, in Mr. Stoddard's section of the quarry, beds 

 nos. 1-5 (21 inches thick) above the Cotham marble belong to the 

 Lower Lias, and beds 6-10 (21 inches of thin clays and limestones) 

 to the Upper Rhsetic. The strata above the Cotham marble here are 

 said by Mr. Stoddard to comprise a bed with Monotis decussata and 

 fish-remains (and indistinguishable from that at Garden Cliff, near 

 Westbury-on-Severn), overlying the bed (no. 3) with Insects. 

 These beds are referred to the Rhsetic series above, at p. 156, in 

 accordance with the classification adopted by the Geological 

 Survey. 



Mr. Wilson informs me that in the roadside quarry on Bedminster 

 Down, a little beyond the public-house referred to above, there are 

 now exposed beneath the Cotham marble 2 to 3 feet of shales pre- 

 cisely similar to bed ' m ' of his Pylle Hill section, without any 

 hard beds in them. 



V. Mr. William Cunnington, F.G.S., gave me some years ago 

 a few specimens in bluish shale from Bedminster, 1 which prove to 

 be D. liassica. 



Another interesting specimen from Mr. Cunnington's Collection 

 is a piece of greenish-grey argillaceous limestone, bearing, on a bed- 

 plane, a multitude of individuals of Darwinula liassica, lying in an 

 almost uniformly parallel arrangement, caused by the moving water 

 in which they were left. This is marked ' Clifton ' and (incorrectly) 

 ' Mountain-limestone.' Mr. E. Wilson, E.G.S., having examined 

 the specimen, states that it belongs probably to his ' Upper-Rhaetic ' 

 Series, " perhaps a hard seam in the light greenish-blue shales 

 marked ' m ' in the Pylle Hill section" given by him in Quart. 



. * This mav be the same, perhaps, as that referred to by Mr. E. Wilson, 

 F.G-.S , in Proc. Geol. Assoc, vol. xiii. (1893) p. 129. 



