W. D. Carr—On the Lincoln Lias. 
Mo.u.vusca= CEPHALOPODA— 
Ammonites bifrons. 
A. crassus and var. 
A. communis. 
A. faleifer. 
A. hetevophyllus. 
A. serpentinus. 
Belemnites clavatus. 
B. subtenuis. 
B. vulgaris. 
B. (2 or 3 other sp.). 
Nautilus (large sp.). 
GASTEROPODA— 
Actgéonina sp. 
CoNncHIFERA— 
Arca sp. 
Astarte Voltzii. 
Avicula sp. 
Crenatula ventricosa. 
Cucullea sp. 
Inoceramus dubius. 
Lima duplicata. 
Lucina sp. (large). 
Lucina sp. (small). 
Macrodon sp. 
Nucula Hammeri. 
Opis sp. 
Ostrea sp. 
Pholadomya sp. 
Pleuromya uniotdes (?). 
167 
Amberlya sp. awe 
Cerithium costulatum. Dragan igapele hcg: 
Cerithiwm sp. BracHIopopA— 
Chemnitzia sp. Discina sp. 
Delphinula sp. Rhynchonella sp. 
Dentalium sp. ARTICULATA = ANNELIDA-— 
(2) Fusus sp. Serpula. 
Littorina sp. 
Pleurotomaria anglica. 
P. sp. 
ANNULOIDA = ECHINODERMATA— 
Pentacrinus. 
PLANTA — 
W ood. 
The first exposure of Middle Lias is seen in the middle pit on the 
south cliff underlying the Upper Lias Limestones, and consists of 
about 10 feet of blue clay with few fossils to bottom of pit. We 
cannot take up in this division a continuous section as we did im the 
Upper Lias, about 20 feet of the middle beds being doubtfully seen ; 
about 10 feet of the lower beds are exposed in the lowest of the three 
pits here, belonging to Messrs. Kirk and Parry, but obscured some- 
what by rainwash and therefore not easy to examine. The bottom 
beds in this pit belong to the top of the Capricornus zone, but the 
pit is now out of use and half full of water, so they cannot be seen. 
A much better working section occurs a mile further south in the 
pit of the Bracebridge Brick Company. The lowest 20 feet of Middle 
Lias is seen at the top, and consists of clays divided by 3 bands of 
ferruginous nodules, a few phosphatic (?) concretions are found 
attached to some of the nodules in places giving them rather a con- 
glomeratic appearance; the fossils are few and badly preserved and 
seem to belong more to the Margaritatus than the Spinaius zone. 
There is a small pit in Middle Lias below that of Messrs. Swan on 
the north cliff which probably links together the upper and lower 
beds that are seen in Mr. Best’s second pit and that of the Brace- 
bridge Brick Co. respectively ; it consists of clays with ironstone 
nodules and irregular bands of soft ferruginous clayey sandstone, 
with occasional casts of shells, which, however, do not help us much 
in determining its exact horizon. 
The Marlstone (rock-bed) appears to be entirely absent, for 
although about 20 feet of Middle Lias is not exposed positively, the 
slope between the upper 10 feet and the lowest beds which are seen 
