COTTESWOLD DISTRICT. 61 
Lower Beds of the Inferior Oolite.’ A list of those determined is given at p. 270. 
It was likewise, I believe, the opinion of Prof. R. Tate that several undescribed 
species of Gasteropods (minute) were to be found in this series. Hitherto I confess 
that my own researches have not been very successful. Moreover, if Mr. 
Witchell’s specimens are to be taken as a sample, there are not many people who 
would venture to describe them. Whilst on the subject of these Micromorphs I 
may observe that the Pea-grit of Leckhampton, Crickley, &c., contains several 
small Gasteropods, many of which appear to be merely the young of well-known 
species. As such extremely small shells would require different artistic treatment 
from the bulk of the Gasteropoda to be described in this memoir, it might be con- 
venient to place them in a separate category by way of supplement ; that is to say, 
if they should prove to be of sufficient importance. 
The Pea-grit is exposed on the flank of the hill, and on this horizon the earliest? 
Nerinzeas in the Cotteswolds may be noticed. The same bed is well shown in a 
roadside cutting near Longford’s mill, and has there afforded several species of 
Nerinea usually distinct from those of the Oolite Marl. High up in the freestone 
series is another bed with Nerinewa, which may probably represent the extremely 
rich beds in connection with the Oolite Marl on the other side of Stroud. The 
third Nerinzean horizon is that in the Clypeus-grit, which we have now traced con- 
tinuously through so many exposures. 
The Clypeus-grit is characterised by Nerinwa Guisei, Wite. 
The Freestones, Oolite Marl, &c., by Nerinea Cotteswoldie, Lye. 
— gracilis, Lye. 
The Pea-grit by Nerinea producta, Wite. 
—  pisolitica, Wite. 
These three Nerinzan horizons, in the Pea-grit, the Oolite Marl, and the Clypeus- 
grit, respectively, have also yielded the bulk of the somewhat scanty collections of 
Gasteropoda which have been obtained from the more classical districts of the 
Cotteswolds. On the other hand, the Upper Trigonia-grit and the Gryphite-grit, 
well stored as they are with other fossils, seem to be deficient in this respect. 
Hence the Ragstones, though far more fossiliferous as a whole than the beds of 
the Murchisone-zone in this neighbourhood, contain fewer Gasteropoda. 
Ropsoroucn Common, about three miles north of Nailsworth Hill. This again 
is classic ground, many both of Dr. Lycett’s and Mr. Witchell’s specimens coming 
from here. Isubjoin a profile, showing the upper or Ragstone-beds in some detail. 
The Upper White Oolite is the bed we have generally met with hitherto in the 
Cotteswold Hills, usually forming the top of the Inferior Oolite. The next three 
1 «Quart. Journ. Geol. Soc.,’ vol. xlii (1886), p. 264, et seq. 
2 The Lower Limestone has hitherto yielded only imperfect fragments of Nerinea. 
