462 
Aug. F. Foerste 
A third specimen of Lepadocystis ^ also in the Museum of Earl- 
ham College, is contained in a rock fragment containing large 
numbers of Zygospira modesta and some branching bryozoan, 
apparently Bythopora delicatula. These forms indicate the Rich- 
mond origin of the cystids, and eventually may lead to a redis- 
covery of the exact horizon. 
A fourth specimen of Lepadocystis, belonging to that part of the 
Dyer Collection which was not sold to Harvard University, has 
been acquired recently by Miami University, and was obligingly 
loaned to me by Professors S. R. Williams, and W. H. Shideler. 
It was obtained from the upper part of the Richmond, at Rich- 
mond, in Indiana. This specimen also presents the radiate surface 
ornamentation already noted in the smaller sized specimen here 
Fig. 5. Diagram of Lepadocystis moorei. The natural size of the specimen is 
indicated by an outline drawing at the right of the diagram. Museum of Miami 
University, Oxford, Ohio. 
described from the Earlham College collection. The character 
of this ornamentation is indicated in the following analysis of the 
plate system. 
The pectinirhomb on plates 11-17 again is well defined. The 
outline of plate 7 certainly is aberrant, and should be more like 
that illustrated in the two preceding diagrams. Possibly there is 
a break in the plate near its lower left hand margin, causing a 
misinterpretation of its outline here. Only the larger plates of the 
outer circle forming the anal area can be distinguished. The 
largest of these is in contact with plates 8, 7, and 13, and evidently 
is the anchylosed representative of two of the plates figured in 
the type of the species. The upper part of the outer anal circle 
is known, from other specimens, to have been occupied by a row of 
