188 General Notes, [ Feb. 
vary glands. The larve have a rudimentary dorsal vessel, and 
this, with their proboscis and aquiferous apparatus (which, how- 
ever, is well developed in the adult), shows the relation of the 
canthocephali to the Nemerteans or Rhynchoccela, while the 
digestive apparatus is more like that of the Trematodes. They 
can no longer be arranged with the Nematodes. | 
Argulus and Mortality of Fishes.—In the October num- 
ber of this journal (vol. xx. p. 856) Mr. F. L. Washburn records 
an annually recurring extensive mortality of different species of 
fish in Lake Mille Lac, Minnesota, and describes as the cause of 
death a Siphonostome, the abdomen of which is furnished with 
an umbrella-like disk. Although this description hardly answers 
to an Argulus, yet I think the mode of occurrence and the great 
mortality point to the parasite being a member of this genus. 
I do not remember to have seen before an account of such de- 
vastations by — in America, but similar accounts from 
Europe are not uncommon. 
Mr. Washburn’s Hote reminded me of the circumstance that 
two years ago Mr. A. C. Lawson, of the Geological Survey of Can- 
ada, brought me an account of a similar mortality of an undeter- 
mined species of Coregonus in the Lake of the Woods. He had 
preserved a number of the parasites, which I marked at the time 
re coregont Thorell (?), with the intention of determining 
afterwards whether the Canadian and Norwegian species should 
turn oar to be identical. I find now that the characteristic cop- 
ulatory ridges on the swimming legs of the male are very dif- 
ferent in the Canadian species from those in Argulus foliaceus or 
coregont. Dr. J. S. Kingsley has undertaken to see whether 
they agree with those in any described American form. 
It may be of interest to note here that Leydig, in a recent 
communication to the Zoologische Anzeiger (No. 237), announcès 
that the “ poison-sting” of Argulus is in reality a sense organ, 
the “ poison-duct” a broad nerve-tube, and the “poison-gland” 
a part of the fat body, so that the great mortality caused by Ar- 
gulids is not to be attributed to any poison injected with the 
bite—R. Ramsay Wright, University College, Toronto, January 8, 
1887. 
Irish Red Deer.—In the March number of the Zoologist 
Rt J Ussher states that the Irish red deer lingered in the moun- 
tains of Knockmealdown, Counties Waterford and Tipperary, in 
bags that its last haunt was Erris, County Mayo, where a 
few existed as s late as 847, when they were slaughtered for food 
ı peasantry. The onl 
