54 E. Billings on the Genus Athyris. 
“One specimen (of A. tumida) shows the pallial and ovarian impres- 
sions to be thick, numerous, and dichotomising frequently from beak to 
margin. 
In the work cited and in the 8d Fasciculus, we find the fol- 
lowing species:—A. tumida, S. concentrica, ambigua, De Roissy, 
expansa, globistriata, globularis, gregaria. , Parada, _pectinifera, 
and squamigera. This shows clearly eno ugh his views of the 
extent of the genus, that is to say, that as it was then under- 
stood, it included both A. twmzda and A. concentrica. In com- 
gpa on this, Prof. Hall says :—‘‘ The fact that McCoy cited 
this* as an Athyris, no more renders it an Athyris than it was 
made Abipis by being thus described by Dalman; and it was 
just as free for the foundation of a genus after the —s of 
McCoy as before.” This is true enough, in part. was free 
for the foundation of a genus until 1853, when Davidson used 
it for that purpose; but since 1853, it has never been 
The above is quite sufficient to prove my first and ee, pro- 
ions. 
Tam not aware that any thing else of much importance, with 
<4 aes of what relates to Merista, having been published 
853, when Davidson’s excellent work, the “ Introduction 
i A Classification of the Brachiopoda,” made its appearance, 
in which the genus was first subdivided. But, before entering 
upon this, I shall notice the remarks of Prof. Suess, on the ge- 
nus Merista. 
This genus was proposed by Prof. Suess, in 1851, but he did 
not then sufficiently characterize it. The e following i is all that 
I can find, relating to it, that was published previously to 1853. 
wi ie E. Suess communicated the results of the investigations on seve- 
ral Brachiopods, from the Bohemian transition rocks, which had been 
distribution of their inner organs points to an affinity with the non-at- 
genus Fentamerus. These inner organs are borne by six parti- 
ewes place of a single calcareous loop; the spiral arms are not un- 
z Heian. Poe the — of these forms (for which the name Meris 
is proposed) fro bn. aches Terebratula, an apparent contradiction in o 
laws of alenntaligt distribution is solved, since these smooth forms 
will now be separated, which have sores offered an apparent contra- 
diction to the present views of these 
_ Lest I should not have ae ue views rightly in this 
translation, I give the original i in the note pelo or. 
* This Jour. II, — 181. 
Suess 
= 
