PLATE LXXXm—Continued. 
Genus HALLINA, N. H. Winchell and Schuchert. 
Page 150. 
Hallina Saffordi, N. H. Winchell and Schuchert. 
Figs. 36-38. Dorsal, profile and ventral views of a typical example. X 5. 
Trenton limestone. Lebanon, Tennessee. 
Genus ATHYRIS, McCoy. 
Page 83. 
See Plates 45-47. 
Athyris incrassata, Hall. 
Fig. 39. The interior of a pedicle-valve of average size; showing the pedicle, adductor and diductor im¬ 
pressions, and the thickened shell-margins. 
Warsaw limestone. Desmoines Iowa. 
Genus STRICKLANDINIA, Billings. 
Page 249. 
See Plate 73. 
Stricklandinia Chapmani. sp. nov. (Compare Billings, Paleozoic Fossils, vol. ii, 
pt. i, pi. vii, lig.» 3). 
Fig. 40. An incomplete internal cast of the pedicle-valve; showing the impression left by the highly de¬ 
veloped cardinal area. 
Niagara group. Hamilton, Ontario. 
Subgenus CRANH5NA, s.-gen. nov. 
Page 297. 
Cran.(ENa lowENSis, CalviiL 
Fig. 41. A preparation showing the structure of the loop, the ascending branches being but partially re¬ 
tained X 2. 
Middle Devonian. Payette, Iowa. 
