206 ANCEID. 
* Annals of Natural History” (No. 5 for 1848, vol. i. 
p- 65), in which he remarks: “I found a species of 
Praniza, pretty common on the clayey shores of Strang- 
ford Loch, last week in company with Anceus mazillaris 
[i.e. the male of A. Halidait above described]. They 
were in small cavities on the surface of the clay, under 
stones, sometimes singly, oftener two, or even three 
and four in each hole; the smaller slender green ones 
were few in comparison. You will find some of the 
new-born young with them having all the characteristic 
form of the parent, but the posterior thoracic segments 
not so completely confounded together.” Mr. Haliday 
furnished us with living specimens of both sexes and 
all sizes, captured at the end of February, 1856, amongst 
which, however, the males preponderated in number, the 
immature females being scarce at that period of the year, 
whilst in the summer they bore a fair proportion to the 
adult male, which was abundant enough. On the 14th 
March following, he observed in a letter to us: ‘ It was 
only the other day I observed the notice in the ‘ Comptes 
rendus’ of the Paris Academy, of Hesse’s observations 
on the identity of Anceus and Praniza. Notwith- 
standing their constant association, and the fact that 
the Anceus is always of pretty uniform size, and Pra- 
niza varies from about the same down to the smallest 
size, 1 should never have guessed that. the latter was 
the larva of the former, and yet do not understand 
how to combine it with my positive observation of 
Praniza producing young, the very eyes of which (be- 
fore birth) were visible through the transparent integu- 
nents of the parent.” 
This Irish species appears at first sight most nearly 
to approach the Anceus formica of M. Hesse’s memoir. 
Our specimens, however, not only exhibit none of the 
Wn sony 
