298 NATURAL HISTORY SOCIETY OF DUBLIN. 
Drasside. 
Olubiona erratica. Walck. 
Ciniflonidee. 
Eresus walckenaerius. Walck. 
Theridiidee. 
Theridion pulchellum. Walck. 
Th. parvulum. Blackw., sp. n.1.c¢., p. 400. Pl. viii. fig. 5. 
Ctenophoridee. 
Ctenophora monticola. Blackw., gen. et sp. n. 1. c., p. 401. Pl. viii. fig. 6. 
This new genus is characterized by a conspicuous comb-like appen- 
dage situated on the anterior side of each tibia and metatarsus of the 
first and second pair of legs. 
Linyphiidee. 
Linyphia polita. Blackw., sp. n. l.c., p. 403. Pl. viii. fig. 7. 
Epeiridee. 
Epetra apoclisa. Walck. 
E. solers. Walck. 
E. cucurbitina. Walck. 
EF. adianta. Walck. 
EF. antriada. Walck. 
Ei. herwt. Hahn. 
Tetragnatha eatensa. Walck. 
Leaving Lucca, on the 7th of May, and spending a day or two at 
Rome, to loiter in its glorious cathedral, and to walk around the Colos- 
seum, I reached Naples and met my friend on the 10th; some pleasant 
days were spent here, visiting the Museum and Professor Costa. 
Mount Vesuvius was still in full activity, and at night was a most 
striking object as seen from the Bay. One day I walked to the foot of 
the new cone, down the sides of which rattled every ten minutes or so 
a small shower of red-hot stones, after each of which there was perfect 
silence; then a loud puff announced an escape of steam, which was not 
visible to me, as it made its escape from the mouth of the crater; but 
when it rushed up a few feet into the air, then the column became per- 
ceptible, and the next instant down came falling the volley of stones 
expelled along with it. 
Walking along the road sides it was impossible not to be struck 
by the solid masses of Mesembrianthemum acinaciforme which covered 
all the sides of the dry earth walls. It was now in full flower, and the 
effect was most brilliant. It grew like a wild weed along the railway 
banks, and appears to be quite acclimatized here. Mr. Haliday had 
