PLATE XIII. 
Figs. 1—3.—Anthracomya Adamsii, var. expansa. From the Little Mine 
Ironstone, Great Fenton. My Collection. (Page 91.) 
Fig. 4.—Anthracomya dolabrata. The type specimen from Prof. Prestwich’s 
‘Geology of Coalbrookdale,’ pl. xxxix, fig. 9, refigured by the Professor’s kind 
permission. (Page 93.) 
Figs. 5—9 and 11.—Anthracomya dolabrata. A series from the Little Mine 
Ironstone of Great Fenton. My Collection. (Page 93.) 
Fig. 7 a.—Fig. 7 seen from above, showing width. (Page 93.) 
Fig. 9a.—Fig. 9 seen from above. (Page 93.) 
Figs. 10 and 12.—Anthracomya modiolaris. Short truncate form from the 
roof of the Holly-Lane Coal, North-Staffordshire Coal-field. In the Collection of 
Mr. John Ward, F.G.S. (Page 95.) 
Figs. 13 and 16.—Anthracomya Wardi. Smooth keelless form from the 
Shale Coal of Wakefield. From the Collection of Mr. David Campbell of 
Wakefield. (Page 105.) 
Fig. 14.—Anthracomya modiolaris. The cast of a large form from the Upper 
Coal-measures of Old Cummock, Ayrshire. From the Collection of Mr. Smith of 
Kilwinning. (Page 95.) 
Fig. 15.—Anthracomya Wardi. From the roof of the Eight-foot Coal of Durie, 
Fife. My Collection. (Page 105.) 
