Kansas. No form nearly allied to it has ever been found 
In the western Sub-carboniferous rocks, but imens now be- 
: re me from rocks in Nova Scotia, so referred by the most reli- 
| : able authorities, seem to be undistinguishable from it. : 
; Pecten Hawni Geinitz, ib. fig. 19. This seems to be quite 
_ Smnilar to Pecten Broadheadii of Swallow, described from the 
| Missouri Coal-measures. If distinct from that species it should 
| be called Aviculopecten Hawni, unless it may possess internal 
characters showing it to be the type of an undescribed genus. 
Dr. White finds it in the upper beds of the Lower Coal-measures 
of central Iowa. 
|, Rhynchonelia angulata Linn. Geinitz, ib., tab. iii, fig. 14. As 
ee has already been shown that the shell figured under this name 
, Snot a Rhynchonella at all, little need be said in regard to its 
vo relations to the European true RAynchonella angulata. 
hope, however, that I shall be excused for adding here, that 
'€ practice of positively identifying species from widely distant 
Parts of the earth upon such merely superficial points of general 
resemblance, and thus complicating and vitiating all conclusions 
Tspecting the geographical and geological range of species, can- 
Rot be too carefully avoided. Bee # : 
Camarophoria globulina Phillips. Geinitz, ib, fig.5. Of this 
shell I have numerous examples from the same position, as well — 
 Riynchonella Uta of Mareou, who has himself identified it with = 
