Haddon and GrREEN — 8econd Report on Irish Marine Fauna. 41 
immediately forwarded it to me for my inspection. It proved, as I 
suspected, to be the species in question, and is a very fine and perfect 
specimen, its dimensions being: extreme length, 90 mm. (3f inches) ; 
greatest diameter, 54 mm. {2^ inches). Mr. Anderson informs me 
that " the shell was taken in 1880, in a trawl-net, in the usual south- 
west ground, twelve or fifteen miles from Dingle, and six or eight 
miles north of Valentia Island (Co. Kerry). It was tenanted by a 
hermit-crab." The depth from which it was obtained would be about 
40 fathoms. The fact that we trawled two living examples of Cassi- 
daria tyrrhena off the south-west coast of Ireland dissipates whatever 
doubt there might have been concerning the Irish habitat of Mr. 
Anderson's capture, so that it is actually the first obtained British 
specimen of this handsome species. 
I am indebted to Canon A. M. ]S"orman for the two following refe- 
rences : — 
Cailliaud, T. Catalogue des Eadiaires, des Annelides, des Cirr- 
hipedes et des Mollusques marins, terrestres et fluviatiles recueillis 
dans le departement de la Loire-Inferieure." JSiantes : 1865. 
Page 180. Cassidaria tyrrhena (Linn.). Hab. : drague vivant 
a quarante ou cinquante metres par les bateaux pecheurs, entre 
Belle-Ile, Hoedic et le Croisic [Bretagne]. Cette espece Mediter- 
raneenne ainsi que VIsocardia cor les Triton nodiferum et cutaceum^ sent, 
pour nos des raretes qui habitent profondement quelques points au 
large de nos cotes." 
Fischer, P. " Essai sur la Distribution geographique des Brachio- 
podes et des Mollusques du litoral oceanique de la Prance." Actes 
Soc. Linn. Bordeaux (4), xxxiii., 1878. On p. 22, Cassidaria tyrr- 
hena is marked off for region 2, which is: ''Begion Armoricaine ou 
du massif breton. — Le littoral tres decoupe de cette region commence 
au Cap de la Hague et de termine, en limitant le massif breton : le 
Golfe de Saint-Malo est entierement compris dans des limites." 
The late J. Gwyn Jeffreys ("The Deep-sea MoUusca of the Bay 
of Biscay," Ann. and Mag. of IsTat. Hist. (5) vi., 1880, pp. 315-319), 
made the following record: — ''JsTo. 121, Cassidaria tyrrhena, Ch. 
Perhaps a variety of C. echinophora, L." (p. 318), and apparently 
he had also dredged it while on 'Hhe 'Porcupine' cruise of 1870, 
off the western coasts of Spain and Portugal" (p. 319). 
Although this is not the place to enter upon a discussion as to the 
distinctness of this species from C. echinophora, it may be here men- 
tioned that the Science and Art Museum of Dublin has recently 
acquired from the Marquis of Monterosato a fine collection of Medi- 
