PLATE XII. 
Figs. | and 2.—dAnthracomya Adamsii. From the Little Mine Ironstone of 
Great Fenton. My Collection. (Page 89.) 
Fig. 3.—Anthracomya Adamsii. Right valve showing the straight and narrow 
hinge-line. Same locality. My Collection. (Page 89.) 
Fig. 4.—Anthracomya Adamsii. Cast showing muscle-scars and longitudinal 
grooves on either side of the hinge-lhne. My Collection. Same _ locality. 
(Page 89.) 
Figs. 5—9.—Authracomya Adamsu. Same locality. Showing variations in 
form. My Collection. (Page 89.) 
Fig. 9a.—Fig. 9 viewed from above. The umbo is not eroded, but is incom- 
plete. Same locality. My Collection. (Page 89.) 
eS 
Fig. 10.—Anthracomya Adamsii. Showing distinct colour-bands. Same 
locality. My Collection. (Page 89.) 
Fig. 11.—Anthracomya Adamsui. Aberrant form. Same locality. My 
Collection. (Page 89.) 
Fig. 12.—Anthracomya Adamsvi. Same locality. My Collection. (Page 89.) 
Figs. 13, 15, 16.—Anthracomya Adamsui. Young forms to show stages of 
erowth. Same locality. My Collection. (Page 89.) 
Fig. 14.—Anthracomya Adamsii. Very young form. Burnwood Ironstone, 
Newchapel. My Collection. (Page 89.) 
Figs. 17,19.—Anthracomya Adamsii. Showing wrinkled periostracum. Little 
Mine Ironstone, Great Fenton. My Collection. (Page 89.) 
Fig. 18.—Anthracomya Adamsii. An oval form not full-grown. Same 
locality. My Collection. (Page 89.) 

