294 
THE GEOLOGIST. 
of which two species have been determined. Among the fossils from 
the Upper Silurian rocks of Dingle Promontory, the moat western 
land of Europe, we recognized an old friend, the Pentamcrus Kiiiyhtii, 
of the Aymestry dixnsion of the Upper Ludlow series. 
The visitor to the IMuseum in St. Stephen's Green should especially 
inquire for the case containing the fossils and plants of the yellow 
and red sandstones, which lie beneath the loAver carboniferous lime- 
stone, and are extensively quarried in many jiarts of Ireland. Here 
we saw, for the first time, that apparently freshwater mussel of the 
lower carboniferous epoch, the Anodon 1 Jukesii ; also the fossil 
plant named Kiton-ia, and that beautiful fossil fern, Cydopteris 
Hibcrnica, which has lately been found near Watcrford with its 
fructification preserved. This fossU fern has its fructification developed 
somewhat after the flishion of the recent and well-known Osmunda 
rcgalts, or flowering fern, so abundant in tlie neiglibourhood of Kil- 
larney. 
I\Iy friend. Dr. idulville, writing mo a description of this discovcrj', 
says that, "in tlie fertile fronds of the C. Hihernica, the pinmilcs of 
the prunary pinnre are divided into cajiillary segments, subclavate at 
their extremities ; but the intermediate pair of pinnules, the pectdiar 
characteristic of the fern, are iincut, and the terminal pinnules of the 
primary and secondary rachides do not exhibit the cajiillary segmenta- 
tion." 
A great deal of valuable information may also lie gained by 
examining the hand-sjiecimens of rocks and fossils in this collection 
before starting for the lidls and f|uarries, as the mineralogical character 
of most of the Irish strata differs very consideral^ly from our English 
types, Avhether those strata be Silurian, Old lied, or Carboniferous. 
Of course, no one, if he could avoid it, would leave Dublin without 
visitmg the other public places of interest, especially the Irish 
Academy, with its gold and jewelled ornaments of a by-gone race. 
We were amazed at those gems, " so rich and rare," evidently the work 
of artists of exquisite skill and taste. There are torques, or twisted 
collars of pure gold, as old, probably, as the period of Torquatus, who 
slew a Gaul in the j'car of Rome, 393, and afterwards avoi'c the 
" tore " he took from the body. There are jewelled cups, and vases, and 
gold ring-money of the ancient Celts ; and there are bells of the time 
