130 Scientific Intelligence. 
later, placed under the genus by McCoy, = has been subsequently cited 
by Davidson as one of the types of Muri 
The most charitable explanation that can aa offered for the reviewer is 
his ignorance of = has been done among the Brachiopoda, by MeCoy 
and Davi idson, in treatises not rare or ohsnure. This question has been 
the names of Arnynris, a and Merisra “acc 
says that no new names can be admitted “till all ‘an pea ones eal hase 
been provided for,” owed very well, if he understands the subject, that 
his arguments are false 
that all the aparion had the beak imperforate, whereas in many of them it is dis 
tinetly perfora 
wn Tn 1847, ‘DOvigny p Epowes to goaae the name of the genus to SpmRicEBA, 
the ground t that which implies the absence of a foramen, was inappro 
prints for species which i the beak distinctly perforated. But he fell into a mis 
4 piso : 6 2 i of perfo- 
mpose 
— species, he i ed in ita cari = —— which are clearly imperforate, such 
A. Ceres, i tum H es A, 
arce, and . en 
ie as the type. “Bee Paléontologie ag gong vol. ey p. 859, and id also Prodrome 
de re: aig i, p. 43.) 
. Spirt pted by several of the leading paleontologists in Europé. 
Prot. Hall sina it in 1857. (See Description of Paleozoic Fossils, 10th An. 
Reg. N.Y., A gi ndix C, p.153.) The two genera were no doubt Prastied by 
e same but accordi i 
e writings of naturalists however must not be interpreted according 
w principle, but much allowance must be made for imperfections in 
es and genera. 
deserptions of s 
ease Brachiopoda (1851-1854), Davidson 
cettied the conflicting descriptions of Moto ped D’Orbigny by dividing the eon 
into two groups, retaining the name Arzyris for that sub-group w. the beak 
imperforate, ore Sereierra for the other with the beak perforated. The former has 
A. tumida for its type, and is precisely equivalent to Hall’s genus MurisTELLa, pro 
posed several rs afterwards. 
This is the Giaaalfication which how writer of the criticism maintains should 
tained, and we cannot see any reasonable 0 objection to it. Itis pn sas tora 
both MoCoy = D’Orbigny. ints no mac on any oth 
inconsis purity of zo nom e, or In any way in 
mencl 
a. Tt ‘isa not require co "modification i in either of the original defi 
typical species F 
which together fics: one larger general group. Aruynris, under this ar arrangemet 
is the generic name of that group which has A. tumida for its type. seal form ; 
ith 
|. 
ba 
one ansopbis- 
seuanie his Ae then oe sites 
this of fowsils far inferior to that ss idsot 
ta TAYRIS must take its and thus ata 
and A i 
i imag of of —_ for which . 2 no! iate. 
-hobeee rare 
ure “4 cannot be maintained. 
