124 
ORGANIC REMAINS. 
Action glaber (Bean, MS.) 
Rostellaria composita? (Min. Conch.) 
Nautilus (imperfect?) 
... PI. IX. fig. 31. Cloughtoji and Brandsby. 
I fig. 28. Ditto. 
Brandsby, (a large speci- 
men.) 
Belemnites. — 1. compressus (Min. Conch, tab. i 90 ; fig. 38. White Nab, &c. 
not of Voltz.) 
2. Aalensis (Voltz.) 
Ammonites Blagdeni (Min. Conch, tab. cci.) 
White Nab, &c. 
White Nab, 
ANNULOSA. 
Vermicularia nodus 
Serpula. — 1. lacerata 
. n. nnaHn 
>. a quadrate species 
PI. IX. fig. 34. Westow, Whitwell, &c, 
PI. IV. fig. 35. Near Scarborough. 
FISHES AND UEPTILES. 
An imperfect plesiosaurus ? was found between the spaw at Scarborough and White 
Nab, by Mr. Williamson, in 1825. 
In the neighbourhood of Brandsby, this rock appears in two separated 
portions, which have different suites of organic remains. The upper 
fissile stone strongly assimilates itself to the calcareo-siliceous slaty 
rock which is quarried on Wittering Heath and at Colly weston, in 
Northamptonshire, and at Stonesfield, in Oxfordshire, both in respect of 
its position and its imbedded fossils. This important distinction is less 
observable in other places, though even where the rock presents but one 
series of similar layers, those fossils are found on the top which lie in the 
slaty stone at Brandsby. The most characteristic of these are gervillia 
acuta, crassina minima, and rostellaria composita ? On the contrary, 
belemnites compressus of Sowerby seems to belong to the lower portion 
of the rock. It appears to me that the slaty stone, in the Yorkshire 
district, is of limited and uncertain occurrence, and, from some former 
investigations in Lincolnshire and Northamptonshire, I suppose it is 
generally the case. I must defer my remarks on the distribution of the 
fossils which belong to this rock, till after the catalogue of those in the 
inferior oolite sand or dogger. 
