








32 UPPER CAMBRIAN. 
eee Reference to McCoy’s L : 
Column of ‘ 5 Names and References; Observations, &c. Numbers and Localities. 
Drawers. Synopsis: and Figures of Genera. 
G | Tretaspis, p.146. Pl.15, f.16.| Trinucleus fimbriatus, Murchison (Siluria, 2nd 
ed. pl. 4, fig. 7). A species with a narrow 
furrowed border; the puncta in rows. 'ri- 
As var. of T. gibbifrons, p. 145. nucleus is a simple trilobite: no eyes or | 3 m, North of Builth (as 
facial suture. The seemingly complex punc- | 7 gibbifrons, var.) 
tate border is remarkable, but very easily 
explainable as a series of spines connected 
by transverse processes. 
G p. 148. Ampyx nudus, Murch. Decades Geol. Surv. 2, | a.101, Builth. [The Tregib 
pl. 10. A remarkable genus like Trinucleus, | locality is erroneous] A. 
but with long front- and side-spines to the | latus, Builth. Abereiddy 
G PL.1e, f.13, p. 147. head. Ampyx latus, McCoy, is only a var. | Bay, Pembrokeshire. (Dr. 
of the preceding, distorted. Hicks.) 
Gk Conocoryphe monile, Salter, n. sp. Glabella | b. 167, Shineton Shales, 
lobed, the front marginal furrow dotted. Buildwas. 
Gk Conocoryphe or Triarthrus, A small species, | Shineton Shales, Buildwas. 
probably of Triarthrus, an Upper Bala genus | [It is possible that the 
in N. America. This was formerly thought | locality may include some 
an Olenus; and the shales were therefore | Tremadoc beds.] 
called Olenus shales. 
Gk églina, sp. The genus has six body segments, do. 
and enormous eyes covering the side of the 
head. It is European only, and strictly a 
Bala fossil (Lower and Middle Bala). 
A@glina, sp. imperfect. The species are nume- do. 
rous. 
G Ogygia corndensis, Murchison (Salter, Mon. | a, 84, Builth. 
Brit. Tril. p. 130, pl. 16). A broad axis 
for the genus. 
G Ogygia Buchii, Brongniart (Salter, Mon. Brit. | Wellfield, Builth; and Pen 
Tril. pl. 14,15). Male and female specimens | Cerrig, Builth. 
of this, the fattest of all Trilobites, and pro- 
Ogygia. bably with the most immoveable segments. 
Gk Ogygia angustissima, Salter, Mon. Brit. Tril. | [Builth. Presented by Mr. 
p- 129, pl. 14, figs. 8, 9, may be only a variety 
of Ogygia Buchat. 


T. McK. Hughes. ] 
