THE ANNALS 
AND 
MAGAZINE OF NATURAL HISTORY. 
SS cesecreeseenesees per litora spargite muscum, 
Naiades, et cireQm vitreos considite fontes : 
Pollice virgineo teneros hic carpite fiores : 
Fioribus et pictum, dive, replete canistrum, 
At vos, o Nymphez Craterides, ite sub undas ; 
Ite, recurvato variata corallia trunco 
Vellite muscosis e rupibus, et mihi conchas 
Ferte, Dez pelagi, et pingui conchylia succo.” 
Parthenii Ecl.1. 
No. 109. JANUARY 1846. 
I.—Note on a new Genus of Nudibranchiate Mollusca. By Gxo. 
J. Atuman, M.B. &c., Professor of Botany in the University 
of Dublin. 
IN the autumn of 1842 I obtained in a salt-marsh about three 
miles to the west of Skibbereen, county Cork, a small Eolidiform 
Nudibranch, which on examination appeared to possess cha-. 
racters entitling it to the construction of a new genus for its re- 
ception. 
It existed in great numbers in the salt-marsh, which was never, 
except at the very highest spring tides, flooded by the sea. The 
day was bright and warm when I met with this curious little ani- 
mal. Many had crept quite out of the water and were crawling 
over the moist fronds of Enteromorpha intestinalis, and seemed 
to delight in exposing their slimy bodies to the influence of the 
warm autumnal sun. Others swarmed on the mud in the little 
shallow pools of the marsh, where their ova were abundantly de- 
posited in the usual gelatinous masses characteristic of the eggs 
of the Nudibranchiate Gasteropods, a fact which is of itself suffi- 
cient to prove that this strange semi-marine and even semi-aqueous 
habitat was quite natural to our little Nudibranch. Their bodies 
were enveloped in an exceedingly abundant mucous secretion, 
which was poured out more copiously than I recollect to have 
witnessed in almost any other Gasteropod, and which is perhaps 
Ay Ann. & Mag. N. Hist. Vol. xvii. 
