Vol. 55.] GKEAT CENTEAL EAILWAT : RUGSr TO CATESBY. 79 



The whole of the fossils from what I consider to be the 

 Henleyi-zone make a small list : the most characteristic being 

 Ammonites Henley i, Sow. {=:A. latcecosta, Sow.), and Inoceramus 

 ventricosus, Sow. (numerous, and some very large). 



(/) Zone of Ammonites capricorniis. 



The upper part of the deep cutting east of Meckuoe may, as 

 stated on p. 77, possibly belong to the capricornus-zone ; Mr, H. B. 

 Woodward thinks that it does,^ and he obtained from it Inoceramus 

 ventricosus, Modiola scalprum, Uyiicardium cardioides, and some 

 gasteropoda. The depth was then (1895) 20 feet. From a general 

 consideration of the dip of the beds and the inclination of the 

 line, it would appear improbable that there can be much of the 

 capricornus-zone present, unless it be through the influence of the 

 fault a little farther south. 



In order to render the present paper a more complete record of 

 the Lower Lias fauna of the district, I have included in the list 

 of fossils at the end (p. 83) those obtained from the capricornus-zone 

 at Catesby tunnel, farther south, quoted from Proc. Geol. Assoc, 

 vol. xiv (1896) p. 428. 



III. The Glacial Deposits. 



The glacial deposits along that part of the Great Central Railway 

 which we are here considering are very variable and interesting, 

 and it is possible that some which differ from each other in 

 appearance may be of contemporaneous formation. 



(i) The Blue Boulder Clay or Local Boulder Clay. 



In nearly all cases along this line of railway where Boulder Clay 

 can be found resting upon undisturbed Lias, the lower portion of 

 it, or the whole, as the case may be, if it is thin, is of the same 

 colour as the rock below, and moreover contains the same fossils 

 in about equal abundance. In fact, it consists almost entirely of 

 the same kind of material as that found in the beds immediately 

 below. The ice which disturbed these superficial Lias deposits left 

 only a small number of erratics behind. 



This local Boulder Clay is first met with near H (53 miles 

 27 chains) and extends to about J, say to 53 miles 50 chains (see 

 fig. 1, p. 66). For some little distance north and south of the bridge 

 at I it contains numerous, large, cubical Lower Lias limestone-blocks, 

 so regular in occurrence as to look like a continuous bed when seen 

 from a distance ; a nearer inspection, however, shows that they are 

 true boulders, for they are tilted at various angles, and they have 

 rounded edges and scratched sides (see p. 69), also the blue clay 

 for 2 or 3 feet below contains fragments of chalk, flints, quartz and 

 quartzite-pebbles, etc., mixed with the Lower Lias fossils. 



1 Geol. Mag. 1897, p. 98. 



