










150 SILURIAN. 
Cc d , 
Oslammn of Reference “2 BECO Names and References; Observations, &c. Numbers and Localities. 
Drawers, | Synopsis: and Figures of Genera. 
FC Pterinea, new like lineatula. a. 804, Dudley, F. C.; 
? Wenlock Shale or Lower 
Ludlow. 
FC Pterinea? planulata, Conrad (Siluria, 2nd ed. | a. 839, anterior and poste- 
Foss. 59, fig. 6). A common shell, but the | rior ear good, Dudley, F.C. 
valves are so equal that it can hardly be a 
Pterinea. 
FC Pterinea. Pterinea (sp. 2) exasperata, Salter, MSS. Long | a. 813, a. 814, a. 816, good 
known, but not yet described. A reticulate | left valve; a. 815, interior 
species. of same valve, Dudley, 
F.C. 
Pterinea (sp. 2) var. coarser ridges. a. 817, Dudley. 
FC p. 262 Pterinea retroflexa, His. (Siluria, 2nd ed. pl. | a. 805, a. 806, left valve; 
23, fig. 17). Widely distributed over N. | a. 807, right valve, Dudley, 
Europe. The ridges vary much and the | F.C. 
form too. 
FC Pterinea, var. coarse imbrications. a, 819, Dudley, F.C. 
Ga? Pl. 1 i, fig. 4, p. 263, Pterinea tenuistriata, McCoy (Siluria, 2nd ed. | b. 721, Myddleton Park, 
Foss. 59, fig. 5). Caermarthen; b.721*, Erw 
Gilfach, Builth. 
Gd7 Pl. 1 i, fig. 7, p. 260: Pterinea demissa, Conrad, var. of P. retroflexa. | b. 722, Myddleton Park, 
This seems to differ only in the squarer | Caermarthen. 
shape, and the lines of growth. 
p. 266. Modiolopsis antiqua, Sow. sp. (Siluria, 2nd ed. | Dudley. 
pl. 23, fig. 14). A very narrow anterior 
end, the lobe small. 
ck M. Nilssoni, p. 267. Modiolopsis gradatus, Salter (Mytilus, Salter, | b. 723, Myddleton Park, 
Mem. Geol. Surv. Vol. 11. Pt. 1, pl. 20, fig. | Caermarthen. 
4). Sharp sudden imbrications of growth, 
the rest smooth, 
F Modiolopsis mytilimeris, Conrad (Siluria, 2nd | a. 811, right valve, a. 812, 
Ga7z ed. Foss. 60, fig. 6). A very broad species— | left valve, Dudley, F. C.; 

almost the shape of Ambonychia. 

b. 724, Wenlock. 
