Miscellaneous. 317 
ON THE GENUS EUPLOCAMUS * OF PHILIPPI. 
Euplocamus of Philippi (Triopa of Johnston) is not, as has been 
hitherto supposed, a genus of Nudibranchia, uniting the characters 
of Doris and Tritonia, the dorsal branchize of the one with the lateral 
branchie of the other. The lateral appendages of Huplocamus I find 
to be processes of the mantle, unfitted for the respiratory office, not 
being provided with vibratile cilia, which are seen only on the plu- 
mose dorsal branchize and on the laminated dorsal tentacula. The 
lateral appendages of Tritonia are, however, true ciliated branchiz, 
as are also those of Kolida and its allies. The gill-lids or branchial 
appendages of Polycera are not ciliated.—Epwarp Forszs. 
NEW LAND SHELLS FROM NEW ZEALAND. 
Helix Busbyii, Gray. Shell depressed, subdiscoidal, largely umbi- 
licated, opake white, covered with a very thick dark green smooth 
periostraca, which is inflexed over the lips. The spire flattened, ra- 
ther rugose ; outer whorl smooth, depressed, rounded; the mouth 
large, bent down towards the axis. Inhab. New Zealand. 
This curious species was discovered by Mr. Busby, to whose exertions 
in natural history we are indebted for many specimens belonging to 
the natural productions of these interesting islands, after whom I have 
great pleasure in naming it. Itis much like H. Cunninghamii of New 
Holland in form and size, but is very peculiar on account of the 
thickness and colour of the periostraca, which is unlike any other 
Helix we are at present acquainted with. 
Helix Dunnieg. Shell depressed, large, umbilicated, pale brown ; 
outer whorl rather angular, smooth. Inhab. New Zealand. Mr. 
Busby. 
Specimens of both these species have been presented to the British 
Museum by Mrs. Dunn, who received them from Mr. Busby.— 
J. E. Gray. 
.BLOOD OF NUDIBRANCHIA. 
The beautiful colours of the Nudibranchous Mollusca are in many 
species, though not in all, owing to the colour of their blood. Thus 
in certain species of Montagua the blood is green, in several of the 
Holide red, in others brown. The analogy between the Nudi- 
branchia and the Annelides is thus curiously supported by the varia- 
tions of colour of the blood. The globules of the blood in most 
species are very large. The blood of Polycera quadrilineata is white, 
and its heart beats one hundred and thirteen in a minute.—Ep- 
WARD Forsgs. 
RED COLOUR OF THE SALT MARSHES OF THE MEDITERRANEAN. 
The red colour of these marshes, often of a very deep tint, has 
been for a long period attributed to the presence of a minute crus- 
taceous animal, Artemia Salina, Leach. Mons. Joly has last year 
attended to this subject, and has come to the conclusion that the 
* See Ann. Nat. Hist. vol. iv, p. 88, v. p. 91. 
