36 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Eber Hyde, from the middle of the Waverly series at Sciotoville, Ohio, 
there is a common species which, on comparison with the t}'pe speci- 
mens of CamarophoreUa lenticuJaris, proves to be congeneric. It is 
specifically quite distinct from the Burlington form and is undescribed, 
unless Professor Alexander Winchell's name, Centronella f flora, be 
available for it. This, however, does not appear possible, for his 
description, as will be explained presently, deals with specimens 
representing two widely separated genera. Excellent material has 
been obtained and it is possible to figure and describe the details of 
structure in the adult probably more fully than has ever been done for 
a Paleozoic brachiopod of this type. It is a spire-bearing form and 
the jugum, which is well preserved in several specimens, is of the 
general type seen in Merista and Meristella. 
The purposes of the present paper may then be briefly outlined as 
follows: (1) the transference of Camarophorella from the position 
of subgenus in the family Pentameridae to full generic rank under the 
subfamily Meristellinae ; (2) the redescription of the genus and the 
description of a new species; (3) the discussion of the structures 
occurring therein with reference to their general morphological bearing 
and to the relationship of the genus. 
It should be stated at the outset that the two structures of most 
importance, indeed of any importance at all, in transferring the genus 
from its former position in the Protremata to the Telotremata, have 
not been observed in CamarophoreUa lentirularis because of the method 
of preservation. These are the deltidial plates and the brachial 
support. As this species must always remain the type of the genus, 
however little its structures may be known, and as the change is made 
entirely as a result of the study of the Sciotoville material, it is better 
to state by way of introduction, the characters in which the two are 
in complete agreement. 
The Sciotoville material is preserved in two ways. Certain indi- 
(luals, when buried, have been so tightly closed that no sediment has 
found its way to the interior. Many of these have been subsequently 
entirely or partially filled with zinc blende, calcite, or pyrite, others have 
preserved the cavity between the valves without any filling. In these 
last and to a certain extent in those partially filled, the original struc- 
tures of the interior are preserved, sometimes perfectly. The muscu- 
lar ])latforms and more or less complete spiralia with their jugal 
attachments may be found in almost as good condition as at the time 
