190 
SILURIAN. 

Case and 
Column of 
Drawers. 
G¢ge6 
Gg 
Ggé 
Gg 
Ge6 
Gg6 
G¢g6 
Gg6 
G¢e6 
Gg6 


Reference to McCoy's 
Synopsis : and Figures of Genera. 
Names and References; Observations, &c. 
Numbers and Localities. 



M. solenoides, p. 269. 
M. complanata, p. 266 ? 
Pl. 11, fig. 4, p. 263. 
Pl. 11, figs. 19, 20, p. 261. 

PL. 1 1, fig. 7, p. 260. 
Pl. 1, fig. 1, p. 283. 
Anodontopsis quadratus, 
Pl. 1&, fig. 10, p. 272, 




Lingula cornea, Sowerby (Siluria, 3rd 
ed. pl. 34, fig. 2). 
Lingula minima, Sow. (Sil. Syst. t. 5, 
fig. 23), 
Discina rugata, Sow. (Siluria, 3rd ed. 
pl. 20, figs. 1, 2). 
Chonetes lata, and Orthis lunata. 
LAMELLIBRANCHIATA. 
Modiolopsis planata, Salter, n. sp. 
Modiolopsis, sp. More convex than 
M. complanata. 
Modiolopsis levis, Sow. (Siluria, 2nd 
ed, pl. 34, fig. 7). 
Modiolopsis platyphyllus, Salter (Mem. 
Geol. Surv. Vol. um. Pt. 1, pl. 20, 
figs. 13, 14). 
Pterinea retroflexa, Hisinger (Siluria, 
2nd ed. pl. 9, fig. 26; pl. 23, fig. 17). 
Pterinea tenuistriata, McCoy. (See 
p. 182.) 
Pterinea megaloba, McCoy. <A very 
convex species, more like an in- 
flated Modiola. 
Pterinea demissa, Conrad. (See p. 182.) 
Ctenodonta subequalis, McCoy, sp. 
(Siluria, 2nd ed, pl. 10, figs. 7, 8). 
Palearca diagona, Salter, n. sp. Almost 
a thomb in shape. 



Downton Sandstone. 
Bone-bed. 
Pout-ar-y-llechau, Llan- 
gadock, 
b. 104, Storm Hill, Llan- 
deilo. 
b. 160, Downton, with Pla- 
tyschisma helicites. 
b. 108, Storm Hill, Llan- 
deilo. 
b. 159, Storm Hill, Llan- 
deilo, figured. 
ce. 48, Horeb Chapel. 
b. 117, Pont-ar-y-llechau, 
Llangadock. 
b. 105, b. 106, b. 107, 
Storm Hill, Llandeilo. 
b. 114, Pont-ar-y-llechau. 
ce. 49, Storm Hill, Llan- 
deilo; b.115, Llechclawdd, 
Myddfai. 
b. 110, b. 111, Storm Hill, 
Llandeilo. 
