By Mr. ANDREWS. 25 
Thompson did not meet it; and in observations of Professor 
Kinahan on the marine fauna of the coast of Clare (Dublin Natural 
History Society, lst June, 1861), he states Prsa tetraodon had not 
been recorded as occurring south of Galway Bay until he had met 
it in Clare. It was always in one habitat; the branching stems 
of that pretty alea Gelidiwm corneum, in shallow rock pools. 
All the specimens were young, and described as under an inch in 
length. 
Genus Hyas, both species, Araneus and Coarctatus, have been 
taken in deep water, Dingle Bay, frequently on the trawling 
grounds. Avraneus is of much larger size, and has no contraction 
behind the post orbitar, while Coarctatus is generally of small 
size, and distinctly contracted behind the post orbitar. Both in 
clear soundings are found free of attachment of foreign substances. 
Coarctatus is sometimes taken in shingly and weedy bottoms, 
where its carapace and legs become thickly coated with small fuci, 
zoophytes and sponge concealing its true outline, hence it has been 
mistaken for the young of Pisa tetraodon. 
Mara Squinado (thorn back crab) has been obtained of large 
size, in the trawl net, Dingle Bay. A very large and beautiful 
specimen was taken, similar to those on the cost of France and 
the Mediterranean, where it is known as Araignee de mer. 
Though rejected in Ireland, it is by no means unpalatable. The 
species with the absence of spines on the surface, Maia 
verrucosa, Edwards, is not unlikely to be met on the south-west 
coast. 
The genus Ewrynome, of which there is but the one species, 
Aspera, has been dredged in deep water, outer Blasket sound, 
coast of Kerry. It is an exceedingly lively and pretty species, 
the form of the carapace not unlike to Hyas, but covered with 
tubercles. The peculiarity of the tubercles, and their rich rose- 
tints, give to it the name of the strawberry crab. It must con- 
stantly be observed the frequency of species on our south-west 
coast that are peculiar to the shores of Cornwall and of Devon. 
I now touch upon a genus of more than ordinary interest, and 
definition ; of interest with regard to the extreme rarity of some 
of the species, and of detinition of the confusion that has arisen 
in the descriptions of specific forms—The genus Xantho. 
Three species have been described as British—X. florida, X. 
