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Prof. Allman on Carduella cyathiformis. 41 
infra alvam. Tentaculorum fasciculi inter angulos disci positi, 
vix separati.” 
The genus includes a single species, viz.— 
 D. cyathiforme (Sars). Semipollicare. Brunneum.” 
Now it is manifest that this definition will not at all apply to 
the Carduella cyathiformis of my paper in the ‘ Microscopical 
Journal,’ nor to the Lucernaria cyathiformis of Sars, with which 
I consider Carduella cyathiformis to be identical. 
The species on which Mr. Gosse founded his genus Depastrum 
is indeed an entirely different animal. It differs from Carduella, 
as Mr. Gosse now admits, in its octangular instead of circular 
disk; in the unequal length of the tentacles, and their clavate, 
rather than capitate, form; in the fasciculate grouping of the 
tentacles, and their arrangement in two or three rows, one within 
the other, instead of their disposal in a single circle ; in their 
origin from the margin, instead of the surface, of the disk ; as 
well as in other particulars of less importance. 
It is plain, then, that, in Mr. Gosse’s “ Synopsis,” the Lucer- 
naria cyathiformis of Sars remains unaffected, though it is there 
cited as a synonym of Depastrum cyathiforme. 
But another question here arises: may a generic diagnosis 
be so framed as to embrace within it the two species? Mr. 
Gosse is of opinion that it may, and he now proposes a gene- 
ralization of his original diagnosis of Depastrum, so as, by the 
omission of certain characters, to enable it to embrace the genus 
Carduella, which he would accordingly suppress. The following 
is his amended diagnosis :— 
“Corpus repente contractum, et supra et infra alvum.” 
Upon this point, however, I must entirely differ from Mr. 
Gosse ; for, in thus amending his original diagnosis, the charac- 
ters he omits, as of only specific value, are assuredly of a higher 
order than those which he retains as generic. Indeed, the genus 
Depastrum, as thus defined, would differ from Lwcernaria far 
less than from Carduella. 
Mr. Gosse reminds us that M. Milne-Edwards, in the third 
vol. of his ‘ Histoire Naturelle des Coralliaires,’ just published 
(1860), gives the generic name of Calicinaria to the Lucernaria 
cyathiformis of Sars. I must nevertheless claim priority for 
Carduella, the genus having been so named by me at the Aber- 
deen meeting of the British Association in September 1859. 
(See Reports of the British Association for that year.) 
I am therefore not prepared to abandon the name of Cardu- 
ella, or to cancel the diagnosis I have proposed for the genus. 
Depastrum, as defined in Mr. Gosse’s “ Synopsis,” is also un- 
