Miscellaneous. 183 
tana, a species hitherto regarded as exclusively Mediterranean. It 
would be very interesting to see whether the individuals with pluri- 
seriate suckers and simple ink-bag agree in other characters with 
S. Oweniana, or whether they represent in the Atlantic a parallel 
form related to S. Oweniana, as S. scandica is to S. Petersi.—Bulletin 
Seventifique, 1889, pp. 171-175. 
Note on Mr. Williams's Paper on a new Species of Ampullaria. 
By Enear A. Suira. 
In the last number of these ‘ Annals’ Mr. J. W. Williams, in his 
** Note on a new Species of Ampullaria from the La Plata,” ob- 
serves :—‘ I have, in company with Mr. Edgar Smith, examined 
the species belonging to this genus which are in the National Col- 
lection, and not found one to which this present shell could be 
referred.” 
This statement, although partly correct, but published without 
my knowledge, seems to imply that I also am of opinion that the 
Museum does not contain the species in question. 
Of this I am not at all certain, for I well remember that Mr. 
Williams’s study of the Museum series was very brief—nor did he 
examine the South-American Ampullarie contained in the d’Orbigny 
collection. 
It seems to me improper to cite my name apparently in support 
of the validity of the supposed new species without warning or per- 
mission. A museum official in assisting a visitor or student does 
not, without a distinct request, pledge himself that any species 
brought for comparison is or is not contained in the Museum! 
Acanthodian Fishes from the Devonian of Canada. 
By A. Surrn Woopwarp. 
The known geographical distribution of the extinct Acanthodian 
fishes is gradually becoming extended by their discovery both in 
Canada and in Siberia; but the only genus hitherto definitely deter- 
mined outside the European areais the typical Acanthodes. It is there- 
fore interesting to note that fragmentary evidence of a remarkable 
generic type, first distinguished in the Lower Old Red Sandstone of 
Forfarshire, has lately been described and figured* from a correspond- 
ing horizon at Campbellton, New Brunswick ; and the circumstance 
seems worthy of a brief special notice, since the relationships of the 
fossils in question are misinterpreted and unrecognized by their 
discoverer. These specimens are triangular dermal spines, more or 
less elongated, laterally compressed, marked with longitudinal ridges 
* J, F. Whiteaves, “ Illustrations of the Fossil Fishes of the Devonian 
Rocks of Canada.—Part I.,” Trans. Roy. Soc. Canada, vol. vi. sec. iv. 
(1889), pp. 95, 96, pl. x. figs. 3, 4. 
