PLATE XXL 



Fig. 1. — Garbonlcola acuta. The original of Ure's "mussel" from East 

 Kilbride. In the Collection of the Royal Society of Edinburgh. (Page 175.) 



Fig. 2. — Anthraco7ni/a subparellela. The original of Portlock's Modiola 

 subparellela. In the Collection of the Geological Survey, Jermyn Street. 

 (Page 176.) 



Fig. 3. — Anthracomija suhparallela. A specimen showing the hinge, in the 

 Collection of the Belfast Museum. (Page 176.) 



Figs. 4, 5. — Anthracomya subparallela. From Carboniferous shale, Slieve 

 Gullion, CO. Derry. In the Collection of the Geological Survey, Dublin. (Page 

 176.) 



Fig. 6. — Anthracomya subparellela. A cast showing~the muscle-scars, from 

 the Carboniferous of Ballycastle. In the Collection of the Belfast Museum. 

 (Page 176.) 



Fig. 7. — Anthracomya Phillipsii. Not crushed. From the Gloucester Coal-field. 

 My Collection. (Page 176.) 



Fig. 8. — Garbonlcola nucnlaris. Large form from the " Cockle-shell " band 

 above the Rusty Pack seam, St. Helens. My Collection. (Page 174.) 



Figs. 9, 10, 10 a. — Anthracomya Wardi. Very large specimens from the Possil 

 Lower Ironstone, Scotland. In the private Collection of Dr. John Young of the 

 Hunterian Museum, Glasgow. (Page 175.) 



Figs. 11,11a, 12. — Garbonlcola robusta, from the Drumgray Coal, Shotts. To 

 show the eroded umbones. My Collection. (Page 174.) 



Fig. 13. — Anthracomya dolobrata. A young specimen from the Lancashire 

 Coal-measures. In the Collection of the Owens College Museum. (Page 176.) 



Fig. 14. — Anthracomya senex. Lancashire Coal-measures. My Collection. 

 (Page 175.) 



Fig. 15- — Anthracomya dolobrata. Medium-sized specimen, somewhat shortened 

 by crushing, from the Coal-measures of Lancashire. My Collectiou. (Page 176.) 



