PLATE XIX. 



Fig. 1. — Protoschizodus impressus. The original of the shell figured by the Eev. David TJre in 

 his ' History of Eutherglen and East Kilbride,' pi. xv, fig. 2. From the latter locality. In the Ere 

 Collection of the Eoyal Soc. of Edinburgh. (Page 233.) 



Fig. 2. — Protoschizodus rectangularis. A right valve from Bally homock, co. Limerick. Geo- 

 logical Survey of Ireland Collection. [The actual shape is more compressed on the dorsal slope than 

 shown in the figure.] (Page 237.) 



Fig. 3. — Protoschizodus rectangularis, the type specimen of M'Coy's Dolabra rectangularis from 

 Bundoran. In the Griffith Collection of the Museum of Science and Art, Dublin. (Page 237.) 



Fig. 4. — Schizodus antiquus. A right valve from the shales below the Millstone-grit, Vale of 

 Todmorden. In the Geological Collection of the Manchester Museum, Owens College. (Page 225.) 



Fig. 5. — Schizodus antiquus. A right valve from the Millstone-grit series at Holt Head, near 

 Slaithwaite, Yorkshire. In the Collection of Mr. J. Barnes, of Manchester. (Page 221.) 



Fig. 6. — Schizodus antiquus {?), Young (?). The shell figured as Anthracosia by Mr. "Wild, 

 'Trans. Manch. Geol. Soc.,' vol. xxi, pi. ii, fig. 7. From the roof of the Bullion Mine, Carre Heys, 

 Colne. In the Manchester Museum, Owens College. (Page 225.) 



Fig. 7. — Protoschizodus obliqzius. The cast of the interior of a large right valve from Easter 

 Bucklyvie, Donibristle. In the Collection of the Geological Survey of Scotland. (Page 235.) 



Fig. 8. — Protoschizodus obliquus. A testiferous example of the right valve. Same locality and 

 collection. (Page 235.) 



Fig. 9. — Protoschizodus obliquus. The type specimen of M'Coy's Axinus obliquus from Mullagh- 

 tenny, Clogher, co. Tyrone. In the Griffith Collection of the Science and Art Museum, Dublin. 

 (Page 235.) 



Fig. 10. — Protoschizodus nuculoides. A testiferous example of the left valve from the eucrinite 

 bed, Broom Hill, St. Andrews. In the Collection of the Geological Survey of Scotland. (Page 243.) 



Fig. 11. — Protoschizodus nuculoides. The type specimen of M'Coy's Anatina deltoidea from 

 Townplots, Killala. In the Griffith Collection of the Museum of Science and Art, Dublin. (Page 

 243.) 



Fig. 12. — Protoschizodus nuculoides. The cast of a left valve. Same locality and collection as 

 Fig. 10. (Page 243.) 



Figs. 13 — 16. — Protoschizodus nuculoides. A series of small examples from Dromard, Drapers- 

 town, co. Londonderry. In the Collection of the Woodwardian Museum, Cambridge. Fig. 14 shows 

 the hinge of the right valve. (Page 243.) 



Fig. 17. — Cardiomorpha parva. A perfect example from the Upper Limestone series of Clon- 

 beith, Kilwinning. In the Collection of Mr. J. Smith, of Kilwinning. (Page 270.) 



Fig. 17 a. — Cardiomorpha parva. The same specimen viewed from above. (Page 270.) 



Figs. IS, 19. — Cardiomorpha parva. Two specimens, a right and a left valve, from the Eedesdale 

 Ironstone, Eedesdale. My Collection. (Page 270.) 



Fig. 20. — Cardiomorpha parva. A right valve, same locality and collection. (Page 270.) 



Fig. 20 a. — Cardiomorpha parva. The same specimen viewed from above. (Page 270.) 



Fig. 20 b. — Cardiomorpha parva. The same specimen viewed from in front. (Page 270.) 



Fig. 21. — Cardiomorpha parva. A very large example from the Lower Limestone series of 

 Craigenglen, Campsie. In the Collection of Mr. J. Smith, of Kilwinning. (Page 270.) 



Fig. 22 .—Protoschizodus inagnus. A bivalve testiferous example from the Carboniferous Lime- 

 stone of Ballyhomock, co. Limerick. In the Collection of the Geological Survey of Ireland. (Page 245.) 



Fig. 22 a. — Protoschizodus niagnus. The same specimen viewed from above. 



Fig. 23. — Protoschizodus magnus. A cast from the Carboniferous Limestone of Little Island, 

 co. Cork. In the Collection of Mr. J. Wright, of Belfast. (Page 245.) 



