Vol. 51 •] OF THE MID-COTTESWOLDS. 411 



by the name ' Gryphite-grit ' is to confuse beds which are by no means 

 contemporaneous ; and, further, that if the name ' Lower Trigonia- 

 grit ' be used at Leckhampton — and it is necessary to employ the term 

 to denote a certain deposit — it is very misleading to lump all the 

 gryphseiferous beds of the Stroud district as ' Gryphite-grit/ This 

 process led to the statement of Lycett, Witchell, and others — that 

 there was in the Stroud district no representative of the Lower 

 Trigonia-grit of the Cheltenham district. The sections above given 

 show the contrary. 



Reviewing these sections, another curious and rather unexpected 

 fact has been brought to light — namely, the ' Bajocian denudation,' 

 which cut through the ' intervening beds ' before the Upper Tri- 

 gonia-gvit was laid down. A sloping trough — if I may use the 

 term — some 6 miles broad and nearly 30 feet deep, was cut through 

 these ' intervening beds ' ; and the lowest part of this trough was 

 close to Cranham Wood, just south of Birdlip. More details may 

 be reserved till after the second part of this paper, which treats of 

 the course eastwards from Leckhampton. 



Part II. 



From Leckhampton Hill eastwards : 



The Discovery in the Cotteswolds of another Ammonitiferous 

 Bajocian Deposit. 



More than fifty years ago my father found at Cold Comfort an 

 ammonite which he identified as Ammonites Iceviusculus. 1 When 

 he was Professor at the Royal Agricultural College at Cirencester, 

 he deposited in the Museum, of which he had charge, a considerable 

 portion of his collection for teaching purposes. About the beginning 

 of the troubles which led to the ultimate resignation of the Pro- 

 fessorial staff, the then Principal by, apparently, a slightly com- 

 pulsory purchase, acquired this collection for the College. In this 

 collection was a specimen marked 'Ammonites Iceviusculus, Cold 

 Comfort, J.B.,' as I noticed when examining the Museum with 

 Prof. Harker, F.L.S., 2 a few years ago. This, being a Witcliellia 

 and not a Hyperlioceras? possessed unusual interest for me, because 

 I was then unaware that Witchellia-\>BabX'mg beds existed in the 

 Cotteswolds. Subsequently, with great kindness, Prof. Harker 

 obtained the consent of the present Principal, the Bev. J. B. 

 McClellan, to make me a gift of this specimen, and it is probably 

 the same fossil as that alluded to in the ' Geology of Cheltenham ' 

 (p. 27). For this kindness I owe my very best thanks to the 



1 Murchison's ' Geology of Cheltenham,' 2nd ed. 1845, by J. Buckman and 

 H. E. Strickland, p. 27. 



2 Just as this paper is finished, I have unfortunately to say ' the late Prof. 

 Harker,' and to deplore the sad loss of a very kind friend in the prime of life. 



8 Ignorance of the keel-structure may cause some externally-similar species 

 of these genera to bo confused. Hyperlioceras is well known in the Cotteswolds. 



