214 
PALEONTOLOGY OF NEW YORK. 
tionopen to question. No observed rhynchonellid has a septum or evinces any 
tendency to the formation of a spondylium in the pedicle-valve, as in Camaro- 
PHORiA. Camarophoria is a genus combining a modified pentameroid interior 
with a rhynchonelloid exterior. The genus appeared in the early Devonian, 
when the prevalence of the pentameroids was past, and species of Camarotge- 
CHiA were on the increase. Its earliest representative in American palaeozoic 
faunas seems to be a shell which occurs in the Corniferous limestone of Cass 
county, Indiana, and which is hardly distinguishable from the middle Devonian 
forms referred to the Terebratula rhomboidea, Phillips.'*' This American shell, 
the occurrence of which has not before been noted, corresponds with the Devo¬ 
nian shells figured by Davidson, though nearly all the specimens give some 
evidence of lateral plications about the margins. No opinion will be here 
expressed as to the specific identity of these Devonian, Carboniferous and Per¬ 
mian shells, except to distinguish by the name, Camarophoria rhomboidalis, the 
American Devonian species, from the Carboniferous shells described by Phillips 
as Terebratula rhomboidea. Representatives of the genus are never abundant in 
American faunas, and the species mentioned appears to be its only known 
example in the Devonian.f 
In the early Carboniferous faunas are a few well-defined species: C. ringens, 
Swallow, from the chert beds of the Burlington limestone; C. subtrigona, Meek 
and Worthen, from the Keokuk group; C. Wortheni, Hall, and Rhynchonella sub- 
cuneata, Hall, from the St. Louis formation. 
The species C. Giffordi, Yf orihQn, has been described from the Coal Measures, 
and C. bisulcata and C. Swallovana, Shumard, from beds considered to be of 
Permian age.:j: 
* Phillips’ species was based upon specimens from the Carboniferous limestone of Holland (Geology of 
Yorkshire, p. 222, pi. xii, figs. 18-20. 1836). Lalei’, in his Palseozoic Fossils of Cornwall (p. 88, pi. xxxv, 
fig. 158. 1841), he referred the Devonian shell to the same species, and is followed by Davidson and other 
authors in asciibing to this species a range from the Devonian into the Permian, where it passes under the 
name of C. gldbulina, Phillips (see Davidson, Carboniferous Brachiopoda, ji. 115 ; Devonian Brachiopoda, 
p. 70; Kayser, Zeitschr. der Deutsch. geolog. Gesellsch., vol. xxiii, p. 529). 
t The shell described in Volume IV of the Palaeontology of New York (p. 368) as Camarophoria, Eucharis, 
Hall, from the Corniferous limestone, is spirigerous, and has been taken as the type of the proposed genus 
Camarospira. 
I The Camarophoria glohuUna, (Phillips) Davidson, and C. Dawsoniana, Davidson, from the upper Car¬ 
boniferous of Windsor, Nova Scotia, are not Camarophorias but ihynchonellids, similar to.R. Uta, Marcou. 
