
SILURIAN. 

Names and References; Observations, &c. 
Numbers and Localities. 





184 
cre Reference to McCoy’s 
Drawers.| Synopsis: and Figures of Genera. 
Gfi4. p. 283. 
Gf4 (Arca) Pl. 1 X, figs. 2, 3, 
p. 283. 
Gf4 Nucula, p. 285. 
Gf4 p. 280 
Gf4 do. 
Gf PL. 1 &, fig. 29, p. 281. 
Gf Pl. 1k, fig. 28, p. 280. 
Gt Pl. 1 K, figs. 26, 27, p. 281. 
Pteropods. 
Gfé p. 287. 

Ctenodonta (Arca) primitiva, Phill. (Mem. Geol. 
Surv. Vol. m. Pt. 1, pl. 21, fig. 5). 
Ctenodonta Edmondiiformis, McCoy? Surely 
a Ctenodonta. 
Ctenodonta anglica, D’Orb. (Siluria, 2nd ed. 
pl. 23, fig. 10). 
Grammysia, De Vern. (1837). The constric- 
tions along the course of the chief pedal 
muscles distinguish this from Orthonotus. 
Many fine forms occur in North America. 
Grammysia cingulata, His. sp. var. obliqua. 
Grammysia cingulata? Hisinger (Mem. Geol. 
Surv. Vol. 11. Pt. 1, pl. 17, fig. 3). 
Grammysia extrasulcata, Salter (Mem. Geol. 
Sury. Vol. 1. Pt. 1, pl. 17, fig. 2). 
Grammysia triangulata, Salter (Mem. Geol. 
Surv. Vol. 11. Pt. 1, pl. 17, fig. 1). 
Grammysia? rotundata, Sow. sp. (Orthonota, 
Siluria, 8rd ed. pl. 23, fig. 5). Scarcely dif- 
ferent from Orthonotus, the constriction 
being quite absent. 
PTEROPODA. 
An inferior group of Molluscs to ordinary 
univalvyes. 
Theca Forbesii, Sharpe (Quart. Journ. Geol. Soc. 
Vol. u. p. 314, t. 13, fig. 1). 

c.8*, Benson Knott, Kendal. 
c. 9, Benson Knott. 
c. 10, Brigsteer, Kendal. 
b. 67, High Thorns, Un- 
derbarrow, Kendal. 
ce. 11, Benson Knott. 
b. 45, Benson Knott, good 
left valve. 
b. 47, right valves, b. 46, 
left, Benson Knott. 
b. 44, Benson Knott, Ken- 
dal. 
c. 12, Lambrigg Fell, Ken- 
dal. 
