12 REPOET OF 



casts of fossil fishes, in the collection of that Institution, found in 

 the coal measures, near Bradford, and unlike any which have yet 

 been discovered elsewhere. One of the Vice-Presidents of our 

 own Society i has presented some minute specimens of delicate 

 and unbroken fresh-water shells, (including cypris, cyclas, &c.) 

 found by him in a white and light deposit which lies on the 

 diluvial chfFs of Bridhngton, locally known by the name of 

 rotten-stone, and employed in cleansing the floors. The 

 remnant of one of the collections of fossil bones from the cave 

 of Kirkdale, which formed part of the first nucleus of the 

 Museum, has been contributed by Mrs. Thorpe, in addition to 

 other donations of minerals and books ; and Mr. Smith 

 has given to the Society a map of the hills of Hackness, ac- 

 companied by a memoir in which the stratification of that 

 district is minutely described. 



But the fact of greatest interest to Yorkshire geology, 

 which the donations of the past year have illustrated, is 

 one connected with some fossils from the vicinity of Hahfax, 

 presented by Mr. Christopher Rawson. It has been long 

 known to the geologists of this county that there exists in 

 the lower part of the coal series of Yorkshire, in connection 

 with a particular bed of coal, one layer of shale which encloses 

 the remains of shells belonging to the marine genera pecten and 

 ammonites, strongly analogous to, if not identical, with fossils 

 of the mountain Umestone series beneath. This shelly layer 

 has been observed, with the same characters, at several points 

 in the vicinity of Leeds, Bradford, Halifax, and Sheffield. In 

 the vicinity of Halifax, it contains argillo-calcareous connections 

 of a spheroidal figure, in the interior of which Mr. Rawson 

 has discovered the same ammonites (a. Listeri) in every stage 

 from the youngest to the full-grown shell, with the same pecten, 

 (p. papyraceus,) and in addition, several specimens of ortho- 



The Rev. Wm. Vernon Harcourt. 



