184 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
E. R. Sykes: Eulimide from Guernsey and other localities, including 
E. anceps, Marshall. 
E. A. Smith: Sinistral and other forms of Helix nemoralis from 
Bundoran, Donegal. 
E. R. Sykes: Specimens in illustration of his paper. 
NOT Es: 
Note oN THE HistoLtocy oF MOoLLUSCAN AND OTHER OLFACTORY 
NERVE CentTRES. (ftead 11th April, 1902.)—The late Mr. Martin F. 
Woodward, in his valuable account of the anatomy of Plewrotomaria 
Beyrichii, Hilg. (Quart. Journ. Micro. Sci., vol. xliv, p. 215), draws 
attention (p. 226), when dealing with the minute structure of the 
branchial ganglia, to a number of “curious dim bodies” lying near the 
periphery of the central mass of the ganglion, “which at first sight 
suggest large ganglionic cells.” That such is not their real nature he 
infers from the entire absence of nuclei in them, as well as from their 
want of sharpness of outline. He finally concludes that “they are in 
reality bundles of fibre, rather more closely packed than usual.” 
It is interesting as a commentary upon this observation by Woodward 
to recall that similar local condensations of the neuropile or glomeruli, as 
they are usually termed, occur in many groups of the animal kingdom, and 
always apparently, as in this case, in nerve centres that innervate sense 
organs of a more or less undoubted olfactory nature. The following 
examples may be cited: the olfactory bulbs of all Vertebrates ; the 
antennary lobes of Insects and Myriopods ; the globuli of Crustacea (the 
centres for the innervation of the antennules) ; and, among Polychsete 
Worms, a lobe of the brain of Aphrodite that probably is related to the 
nuchal region. 
It will be observed that in all these instances the sense organs 
innervated from these glomerulated centres are, at any rate probably, 
olfactory ; and the same is true for Pleurotomaria, in which the 
osphradium is directly innervated by this glomerulated branchial ganglion, 
What the physiological meaning of this very widespread association 
of a glomerulated neuropile with the sense of smell may be is not yet 
explained, but the facts as they stand are of no little interest. 
R. H. Burne. 
MARINE SHELLS COLLECTED AT ADEN BY COMMANDER E. R. SHOPLAND. 
—The following species were accidentally omitted from the list published 
in the last number of these “ Proceedings ” (p. 175), viz. :— 
Leptoconchus serratus, Desh. 
Cyprea annulus, L. 
» Arabica, L. 
cameleopardalis, Perry. 
»  carneola, L. 
caurica, L. 
eribraria, L. 
