PUATE, Xvi 
Figs. 1 and 2.—[ Modiola] Macadami, var. subparallela. From the Ballycastle 
Coal-measures, co. Antrim. In the Collection of Mr. Joseph Wright of Belfast. 
(Page 88.) Since page 88 was printed I have discovered from a fine specimen in 
the Belfast Museum, showing the hinge, that the shells from Ballycastle now 
figured are not of the genus Modiola, but belong to the Anthracomye. 
Fig. 8.—Anthracomya subcentralis. The roof of the Four-foot Coal, Bilboa, 
Castlecomer. Collection of the Geological Survey, Jermyn Street. (Page 109.) 
Figs. 4 and 5.—Anthracomya subcentralis. Bilboa, Queen’s Co. Collection of 
the Geological Survey of Ireland, Dublin. (Page 109.) 
Figs. 6 and 7.—Anthracomya Williamsoni. Same locality and Collection. 
(Page 99.) 
Figs. 8, 9, 10, 12—15.—Naiadites modiolaris. Showing the striated hinge- 
plate ; obsolete anterior hinge-tooth and trifid anterior adductor scars. From 
the Shale above the Bowling Alley Coal, Hanley and Bucknall Colliery, North 
Staffordshire. My Collection. (Page 131.) 
Fig. 11.—Naiadites? sp. A portion of the shell magnified to show prismatic 
structure, from a specimen sent me by Dr. John Young of the Hunterian Museum. 
(Page 131.) 
Figs. 16, 16 a, 18, 18 a.—Naiadites modiolaris. Two views of two casts showing 
anterior and posterior muscle-scars and the mantle-line. Roof of the Hard Mine 
Coal, Adderley Green, North Staffordshire. My Collection. (Page 131.) 
Fig. 17.—Naiadites modiolaris. To show the flattened right valve. Same 
locality and Collection. (Page 131.) 
Figs. 19, 20.—Naiadites modiolaris. To show variation in contour. Same 
locality and Collection. (Page 131.) 
Fig. 21.—Naiadites modiolaris. From the locality whence the types were 
procured. Coalbrookdale. My Collection. (Page 131.) 
Figs. 22—26.—Naiadites modiolaris. Testiferous specimens showing lines of 
erowth and variation in shape. Roof of the Hard Mine Coal, Adderley Green, 
North Staffordshire. My Collection. (Page 131.) 
Figs. 27—30.—Naiadites modiolaris, A series of young specimens from the 
same locality. My Collection. (Page 131.) 
Figs. 31—38.—Naiadites triangularis. A series showing the changes resulting 
during growth. From the same locality. My Collection. (Page 135.) 
