PLATE II. 



Fig. 1. — Pinna jiahellif or mis. One of tlie types of ^VCoy^a Pinna fiexicostafa 

 from Lowick. In the Collection of the Woodwardian Museum, Cambridge. 

 (Page 1.) 



Fig. 2. — Pinna flahellifo mm. The type of P. inasquicosfata, M'Coy. Preserved 

 in the Griffith Collection, Museum of Science and Art, Dublin. (Page 1.) 



Fig. o. — Pinna flahelliformis. The type of Phillips's Pinna cos^iata, preserved 

 in the Gilbertson Collection, Natural History Museum, South Kensington. 

 (Page 1.) 



Fig. ^. — Pinna fiabellifurniis. The cast of a left valve from Lowick. In the 

 Collection of the Woodwardian Museum, Cambridge. (Page 1.) 



Fig. 5. — Piinta flahelliforniis. A semi-decorticated specimen from the Car- 

 boniferous Limestone of Narrowdale, Staffordshire. My Collection. (Page 1.) 



Fig. 6. — Pinna fiabeUiforniis. One of M'Coy's types of P. flcvirosfata , a cast 

 of the interior, from Lowick. In the Collection of the Woodwardian Museum, 

 Cambridge. (Page 1.) 



Fig. 7. — Leiopteria Jnnnlafa. The type of Phillips's Gcrrillia hinuJata. Pre- 

 served in the Gilbertson Collection, Natural History Museum, South Kensington. 

 (Page 11.) 



Fig. 8. — Leiojjfcria, lunnlata. — The type of M'Coy's Acirnla recta. A young 

 condition of the shell. Preserved in the Griffith Collection, Museum of Science 

 and Art, Dublin. (Page 11.) 



Fig. 9. — Lcioptcria, IniiuJafa. — A specimen showing the anterior end. From 

 the Carboniferous Limestone of Castleton, Derbyshire. My Collection. (Page 11.) 



Fig. 10. — Ijciopteria lunulata. A large example from the Carboniferous 

 Limestone of- Clane, co. Kildare, in the Collection of the Woodwardian Museum, 

 Cambridge. (Page 11.) 



Fig. 11. — Lciopfrria hinnlafa. The type of Aricnhi Jgorigafa, M'Coy. From 

 Milhcent, Clane, co. Kildare. In the Griffith Collection, Museum of Science and 

 Art, Dublin. (Page 11.) 



