PLATE XVII. 



Tig. 

 1 a. 



Ophioderma Gaveyi, Wright, p. 147. 



2 a. Ophiolepis MuRiiAVii, Forbes, p. 151, 



8. 



4. 

 5 a. 



AcaouRA Brodiei, Wright, p. 153. 



Under surface, natural size ; this 

 specimen belongs to the Mnseum 

 of the Worcestershire Natural 

 History Society. 

 Portion of a ray, magnified three 

 diameters. 

 Under surface, natural size, on a slab 

 of Marlstone; this specimen be- 

 longs to Dr. Wright's collection. 

 The same, magnified two diameters. 

 Portion of a ray, magnified four 



times. 

 Ditto, magnified four times. 

 Specimen, natural size ; this specimen 

 belongs to the collection of the Rev. 

 P. B. Brodie, P.G.S. 

 The same, magnified three diameters. 



