44 



INFERIOR OOLITE AMMONITES. 



Striatu- 



lum 

 subzone. 



Cottes- 

 wold 

 Sands. 



1G. 1 Hardish, less compact, yellow rock (softer below), with irony grains ; very 

 closely attached to bed 15. Lioc. opalinum, small size ; Gramm. 

 aalense, Ziet. ; Trigonia Ramsay i, Lye. .... 

 C" 17. Yellow, softer, easily broken marl, with dark bro.vn grains. Rhyncho- 

 nella cynoeephala, Rich., Gramm. Moorei, Lye. ; Lytoceras Wrighti, 

 S. Buckman, 2 occurs in this bed and the bottom of the one above 

 18. Dark brown seam with Rhynch. cynoeephala abundant 



C 19. Yellowish-brown marl, similar to No. 17, containing at the base a line of 

 nodules embedded in it at irregular intervals. These nodules are 

 similar to the stone occurring in the sands below, viz. bluish-grey, hard, 

 sandy, micaceous stone, with no ferruginous grains. Tereb. hares- 

 fieldensis, Dav., occurs frequently throughout this bed, but more com- 

 monly just above the nodules. Gramm. striatulum, Sow., occurs in 

 fragments 3 ...... 



B 20. Greyish-yellow micaceous sands, extending down the hill perhaps 100 feet. 

 They are not exposed except in very small openings, and a few feet at 

 the top. About thirty feet from the bottom, from a band of sandy stone, 

 fragments of a variety of Hildoceras bifrons were obtained . 



A 21. Upper Lias Clay ? 



Ft. In. 



4 



6 

 1-2 



10 



100 ?0 



1 Beds 17, 18, 19, and perhaps part of 16, are the Gloucestershire Cephalopoda-bed of various 

 authors. Dr. Wright drew the line between Lias and Oolite either between 15 and 16 or 16 and 17. 

 There is no lithological break between beds 15 — 19, except perhaps 18. They almost pass one into 

 another. Bed 15, Mr. "Witchell told me, he probably included in his Sandy Ferruginous Limestones. 



2 Lytoceras Wrighti, new species, figured by "Wright as Lytoceras jurense, ' Monog. Lias Ammo- 

 nites,' pi. 79, 1884, but not the species so named by Zieten. 



3 At Frocester Hill (called Coaley Peak in the Ordnance Survey Map) the well-known quarry 

 does not show the whole of the beds so well, and one has now to obtain additional information from 

 exposures in the near neighbourhood. The beds equivalent to 15, 16, 17, at Haresfield, both in 

 lithology and palaeontology, present exactly the same features except that the divisions between them 

 are more marked. Between 15 and 16 the difference in lithology is very striking on a smooth face, 

 and between 16 and 17 a slight band of marl is perceptible. The dark seam (18) does not contain 

 Rhynch. cynoeephala in noticeable abundance, it varies from 2 — 3 inches, and is certainly not 

 persistent, as one exposure in the quarry does not show it at all, while the other a few yards beyond 

 does so plainly. The bed below is considerably thicker than at Haresfield (19), being three feet. It 

 is in a rather more marly condition than the bed above the seam, and contains Tereb. haresjieldensis 

 in abundance, especially about the middle. Sometimes it inclines to a blue colour. Towards the 

 lower part, which, however, I could not see well, a very dark bed occurs similar in character to 

 bed 8 at Coaley and bed 14 at Nibley. At its base, and resting on the yellow sands, a line of blue- 

 hearted sandy nodules is situated. (The yellow sands probably extend about 150 feet down the hill, 

 but present no sections.) The above fossilif'erous beds are very rich, especially in the upper part. 

 Lioceras opalinum occurs exactly as at Haresfield. Lytoceras Wrighti occurs rather frequently and of 

 large size in the beds equal to 16 and 17, both on the dark seam and at top of 16, and I have collected 

 it ami Lytoceras opalinum as close together as possible in the same lump of rock. 



