80 UPPER CAMBRIAN. 


Case and Reference to McCoy’s 
Column of 
Drawers. |Synopsis : and Figures of Genera. 


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









p- 211. Pentamerus oblongus, Sow. (Siluria, Upper Bala proper. Llandovery Group. 
P. levis, p. 209. 3rd ed. pl. 8, figs. 1—3). P. levis Cyrm-y-Brain, near 
ma is the young only. The lamella Wrexham ; 
is very long. a. 192*, Noeth Grug. 
G Pentamerus undatus, Sow. (Siluria, b. 209*, Mathyrafal ; 
3rd ed. pl. 8, figs. 5—7). David- Goleugoed ; Mandi- 
son, Sil. Br, t. 19, figs. 49. nam. 
G Pentamerus liratus, Sow. <Strick- a. 190, Mandinam. 
P. microcamerus, McCoy. landinia lirata. Davidson, Mon. 
p. 210 Sil. Brach. pl. 20. 
Pentamerus globosus, Sow. (Davids. 
Sil. Brach. t. 19, figs. 10—12, is 
rare). 
N.B. The species of Pentamerus with 
short hinge-plates and a wide in- 
stead of elongate habit have been 
long distinguished by Billings 
as a new genus, Stricklandinia. 
They are only found in the Llan- 
dovery and May Hill rocks. 
Go p. 213. Orthis Actoniw, Sow. (Siluria, 2nd b. 208*, Mathyrafal. 
ed. pl. 5, fig. 11. Mem. Geol. 
Surv. IIL. p. 339, pl. 21, figs. 1—8), 





p. 192 : 
G Orthis biforata, Schlot. var. lynx, | b. 206*, Maes-y- | b. 207*, Mathyrafal. 
: Eichwald (Geol. Russ, t. 3, fig. 8). | fallen. 
Go Orthis fissicostata, McCoy. A new | Ash Gill, Westmor- | Mathyrafal. 
Jissicostata, McCoy, species, having a very wide form, | land; b. 205*, Maes 
p. 193. and the ribs divided. Hir; and b. 204*, 
Aber Hirnant, Bala. 
Go p. 218. Orthis biloba, Linn. (Siluria, 2nd ed. | b. 208*, Cefn Goch, 
pl. 9, fig. 20). Glyn Ceiriog. 
Go p. 214. Orthis calligramma, Dalm. (Geol. 
Russ. t. 13, fig. 7.) 
Go Orthis, var. Walsallensis, Davidson | b. 201*, Llanfyllin, 
(Salter, Mem. Geol. Surv. ut. p. | N. Wales. 
337, pl. 22, figs. 6, 7). 
Go O. plicata, p. 222. Orthis, var. plicata, Sow. (Siluria, | Rhosfawr, Llanfyllin. | b.202*, Noeth Grug; 
2nd ed. pl. 5, fig. 9), Penlan? Llandovery. 
