Lingula vernoni nov. 
Fig. 1 Mold of type. x 3 
PiggZ ly pedmmrediclel valvesoxs 
Cornulites hopkinsi nov. 
Piga e it olotyperxs 2 
Ctenodonta ruedemanni nov. 
Fig. 4 Holotype. x 2 
Orthodesma sp. 
igamsiWettanalversaiiy7 
Pterinea rotunda nov. 
Fig. 6 Holotype. x 2 
Pterinea sp. 
Fig. 7 Right valve.x 1% 
Pterinea jordani nov. 
Fig. 8 Holotype.x 1% 
The originals of the figures are in the New York State Museum. 
Note. From Dr E. O. Ulrich, to whom some of the ostracods had been 
sent for identification; the following important note was received after this 
paper had gone through the press: 
The ostracods are sufficiently well preserved to warrant the following 
specific and generic identifications : 
Kloedenia normalis U. and B. 
Dizygopleura acuminata U. and B. 
Both of these species are particularly characteristic of the lower part of 
the Wills creek and the upper part of the McKenzie formation in Maryland, 
hence of the position to which I have assigned the Vernon shale. (See 
Maryland Rep’t, 1923, p. 267.) 
[116] 
