LOWER LIAS : GOLDEN CAP. 67 
be seen, some in the Belemnite Stone, others in still greater 
profusion in, different layers of the dark shaly marls beneath. 
The long pencil-like forms of B. longissimus are conspicuous, but 
difficult to ex'ract, while B. elongates, B. claratufi, and B. pollex 
are not uncommon. A large number of species have been 
identified, and these include also B. apicicurratus, B. BucJdandi, 
B. compressus, B. junccus, B. Milleri, B. nitidus, B. penicillatus, 
B. striolatus, and B. rulgaris* Among the Ammonites A. 
fimbrintus and A. striaius may be found in the Be'emuite Stone. 
The dark shaly marl especially, yields a number of small 
pyritic Ammonite,- 1 , which may be found in the Stonebirrow 
cliffs, and which are collected for sale at Black Yen. These are 
cut and polished for brooches, the species being Ammonites sub- 
planicosta, and A. planicosta (Dudressieri). Species of Amberleya 
(Eucyclus) also occur together with Waldheiniia numismalis, 
Pcntacrinus basalt if or mis, &c. 
Mr. Day has given a general list of fossils from the Belemnite Beds, 
which he regarded as the commencement of the Middle Lias. He 
however admitted that there was no real line of separation between the 
Lower and Middle Lias.f (See p. 33.) 
With regard to the palseontologicai horizons in this division, 
there can be no doubt that the zones of Ammonites armatus, 
A, Ibex, and A. Jamesoni are represented : but we find no 
evidence here, and none elsewhere to separate these zones. At 
Fenny Compton we find the same general association of forms 
in beds grouped under the name " Jamesoni Beds " by Mr. 
Beesley, but this name was used mainly for convenience as the 
fossils of the zone of A. armatus could not be separated. So far 
as I know the zone of A. Ibex is nowhere distinctly to be 
recognized in this country. 
Oppel doubtfully included the region : of Ammonites armatus 
in this set of beds, and it was recognized also by Dr. Wright. 
Fine specimens of A. armatus, with large spine 5 , have been 
obtained from the neighbourhood of Lyme Regis; but sis they 
usually come from fallen blocks the precise horizon cannot always 
be stated. They arc mostly found at Black Ven, and some, at 
any rate, come from beds grouped with the zone of A. raricostatus. 
Oppel also recognized the zone of A. Jamesoni, with A. brevi- 
spina, Waldhchniu numismalis, &c., evidently in the dark shaly 
beds below the Belemnite Shine; and this zone was also placed in 
the Belemnite Beds by Dr. Wright, who records A. Jamesoni from 
" Charmouth." I obtained no examples either of this species, or 
of A. Ibex from Dorsetshire. Oppel considered that the zone 
of A. Ibex containing A. Loscombei and A. Henleyi occurred 
below his " Dawei-bctt," but this assemblage belongs rather to a 
higher stage, being a part of the Green Ammonite Beds, to be 
shortly described. I am not a\vare that A. Ibe.r hp.s ever been 
obtained in Dorsetshire. Dr. Wright mentions that he had seen 
no example of the species from the district, and while refraining 
* J. Phillips, Moiu><rriiph on Bel 'mnites (Paheontornpli. Soc.). 
f Quart. Journ. Geol. Soc., vol. xix. p. 290 ; see also Geol. and Nat. Hist. Reper- 
tory, vol. i. p. 193. 
E 2 
