Figure 57 Devonian fossils. (Pelecypods, A-H ; conularids, 

 /, J; pteropods, K-M). A Leptodesma longispinitm, x$4- B 

 Megambonia (?) aviculoides, x^. C Aviculopecten ornatus, x$£. 

 D Actinopteria textilis, x%. E CypricardcUa bcllistriata, xj4. 

 F Pterinca flabellum, x]/2. G Ptcrinopectcn sub orbicularis, x^. H 

 Orthonota undulata, x 1 /^. I Hyolithcs neapolis, x3 J />. J Conularia 

 iindulata, x]A,. K Styliolina fissuretta, x3. L The same, x6, M 

 Tentaculites bclhdus, x2. 



