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PRODUCTUS* 
Gen. Ciiar. An equilateral unequal- valved bivalve 
with a reflexed, more or less cylindrical, mar- 
gin ; binge transverse^ linear : beak imper- 
forate * ; one valve convex, the other flat or 
concave externally. 
No one not usually conversant with the subject, would 
conceive the shells I have collected for this Genus could be 
in any way related to the Genus Anemia of Linnaeus, but 
as yet there seemed no other place for them in the system 5 
nor do they agree with any of the Genera established by 
later Authors. Martin has pointed out several divisions of 
the Genus Anomia; one of them which he defines to be 
imperforate, with one valve gibbous, the other flat or 
concave, hinge on a straight lme, ,, includes these shells and 
I expect several others, as he considers the reflected margin 
to be accidental. His Conch. Anomites productus is a good 
type of the Genus, therefore, as the name Anomites must 
be laid aside, I have adopted his specific name as the 
Generic one, the character it expresses being also peculiar. 
It is highly gratifying to me that I have the means of show- 
ing so many new Species of such a curious Genus as this 
from Scotland, by the help of the indefatigable, ingenious, 
and zealous Friend to science, the Rev. John Fleming of 
Flisk; every one must feel pleased at his generous desire 
to facilitate knowledge by trusting such delicate specimens 
so far, and further at his desire to commemorate the late 
Mr. Martin, by naming this Genus after him, for his 
superior talent in showing the divisions in the old Genus 
Anomia, but as the name Productus appeared so applicable, 
I was loth not to use it, so have been content to apply his 
name to the species I have robbed of the Generic one. 
* This term is used because it was formerly placed among Anemias, 
which included perforate and imperforate. 
