94 



Mr. A. S. Woodward on the 



tion to the orifice, so that the inner tliroat of the shell at some 

 little distance down appears almost closed. 



Three specimens, of which two are in good condition. 



We take this opportunity of correcting two errors that have 

 appeared. In our paper in Ann. & Mag. Nat. Hist, for Sept. 

 1891 the dimensions of Cydostoma transvaalense should liave 

 been long. 12, lat. 11| mill. In the same paper it will be 

 noticed that there is a discrepancy between the number of 

 teeth in Vertigo thaurnasta as stated in the Latin and the 

 English text. The former is correct, for it will be seen on 

 reference to the plate that the shell has three teeth. 



EXPLANATION OF THE PLATES. 



XY. — On the Sl-eleton of a Chima'roi'd Fitih (Ischyodus) 

 frovi the Oxford Clay of Christian Malford, Wiltshire, 

 ^^j A. Smith Woodward, F.G.S. 

 Of the later Jurassic Chimteroid fishes several skeletons have 

 been discovered in a good state of preservation in the Bava- 

 rian Lithographic Stone (Lower Kimmeridgian) *. In 

 * Ischyodus avitus: Chitmcra {Ganodm) avifa, IL von Mover, Pahrou- 

 togv. vol. x. (1802), p. 87, pi. xii. — Isc/iyodus Quensttdli, A. NVaguor, Abli. 



