142 ANATINID A. 
more than that it is scarcely distinguishable from it malacolo- 
gically. The shell is rather more convex, the posterior end 
shorter, more arcuated and scabrous, not quite so broad, and 
the ossicle somewhat more wiry than in A. phaseolina: the 
two when adult are about the same size. 
I am the original discoverer, more than thirty years ago, 
and named it specifically intermedia, by which appellation 
it was long known on the Devon coasts, and in private collec- 
tions, but I neglected to substantiate my claim by publication. 
Agreeably to the ‘ British Mollusca,’ i. p. 224, Mr. Macgillivray 
described and named it Anatina villosiuscula, in Jameson’s 
Edinburgh Philosophical Journal, 1827. Of course by my 
laches I lost my discovery; but it is strange that Professor 
Macgillivray, in his ‘ Mollusca’ of Scotland, in 1844, passes 
over his own previous notes and my discovery without the 
shghtest recognition. It is possible the learned Professor may 
have had reason to doubt the honour of paternity, and thus 
handsomely consigned it to the care of the “ vrai Amphitryon.” 
Consequently, under this view, I feel that I am morally, if not 
strictly, entitled to take care of my own bairn. 
A. norvecica, Chemnitz et nobis. 
Lyonsia norvegica, Brit. Moll. i. p. 214, pl. 8. f.6-9; (animal) pl. H. 
f. 3. 
Mya norvegica, Auctorum. 
Animal elongated, rather thick, of a pale brown aspect, 
except the foot; the liver is grass-green. The mantle is 
closed, leaving only an opening for the foot close to the poste- 
rior end. The margin of the pedal aperture is strongly scal- 
loped, marked between the dentations with black points, as 
well as on the sutural line of the mantle for some distance on 
both sides of it. The foot is pure white, flat, broad at the 
base, tapers to a point, and is cloven at the heel, from whence 
byssal filaments issue. The siphonal processes are two short 
tubes, which appear enclosed in one sheath, that has the 
margin finely dentated; each orifice is garnished with about 
eight white simple cirrhi and as many black equidistant points 
at their external edges ; the surfaces of both tubes when ex- 
