OORNBBASH : WEYMOUTIJ. 
437 
Forest Marble was exposed. The lower beds of the Cornbrash 
consist of grey earthy limestone, marly beds and clay, with Avicula 
ecliinata, Terebratula, and Rhynchonella ; and they rest on the 
flaggy shell-limestones and clays of the Forest Marble. The beds 
here occur in proximity to a considerable fault, and they exhibit a 
local anticlinal disturbance. 
From the Cornbrash between Weymouth and Bridport, I 
obtained the following fossils : 
Ammonites Bakeriae. 
Astarte. 
Avicula ecliinata. 
Ceromya concentrica. 
Goniomya v. scripta. 
Gresslya peregrina. 
Homomya crassiuscula. 
Isocardia. 
Lima. 
Lucina. 
Modiola bipartita. 
Myacites calceiformis. 
decurtatus. 
recurvus. 
securiformis. 
Ostrea costata. 
Sowerbyi. 
Pecten demissus. 
fibrosus. 
Pecten vagans. 
Pholadomya deltoidea. 
lyrata. 
Phillips!. 
Thracia ? 
Trigonia. 
Khynchonella concinna. 
varians. 
Terebratula maxillata. 
Waldheimia obovata. 
ornithocephala. 
Serpula intestinalis. 
tricarinata. 
vagans. 
Acrosalenia spinosa. 
Wiltoni. 
Echinobrissus clunicularis. 
Pygurus Michelini. 
Anabacia complanata. 
A small outlying mass of Cornbrash was noted by Bristow 
on the Geological Survey Map (sheet 17) at West Cliff south of 
Watton, near Bridport Harbour. I failed to observe this, coming 
to the conclusion that, owing to the waste of the cliffs, this patch 
of Cornbrash has been destroyed. In 1856 Dr. Wright gave a 
list of fossils from the Forest Marble of this locality,* including 
the following species which are very suggestive of the Corn- 
brash : 
Avicula echinata. 
Terebratula intermedia. 
Waldheimia obovata. 
Acrosalenia hemicidaroides. 
Acrosalenia spinosa. 
Echinobrissus clunicularie. 
Holectypus depressus. 
Rampiskam to Sherborne and Temple Combe. 
For some distance north-east of Bridport, the Cornbrash is 
entirely obscured by the overstep of the Cretaceous rocks, [t re- 
appears in an inlier at liampisham, and is again found near Corscomb 
and West Chelborough. From the neighbourhood of Melbury 
Sampford northwards, the outcrop is fairly persistent, being 
shifted only here and there by faults. The outcrop is an im- 
portant one, for it is characterized by numerous villages and 
towns, whose sites were fixed by the readiness with which supplies 
of water could be obtained from the strata, not merely along the 
main outcrop, but from some of the larger outliers. 
* Quart. Joura. Geol. Soc., vol. xii. p. 310. 
