ADDITIONAL ERRATA. 
Page 19, 18th line from bottom, after Gryphæa Pitcheri insert var. navia. 
æ 62, 12th t for P. pustulosus read P. rogersi. 
CCC E da SR for T. roissyi read Spirifer lineatus. 
3 cS D ERR E gy for Millipunctata read Millepunctata. 
for Spirifer musebachanus read Spirifer cameratus. 
for S. pilosus read S. Kentuckensis. 
" 63, 2d " top, for Spirifer Pilosus read Spirifer Kentuckensis. 
ORE T x Ex for Millipunctata read Millepunctata. 
` EM M * for Terebratula roissyi read Spirifer lineatus. 
. 66101, 13ih se te after Fr for Shwyd road Lhwyd. 
. * 119, No. 114, for Product 1 ] Productus Rogersi 
B moe UT MM ina roissyi read Spirifer lineatus. 
* ^" 4 118, for Millipunctata read Millepunctata. 
s «e 4 119, for Spirifer musebachanus read Spirifer cameratus. 
"mm — ** 1193, for Spirifer pilosus read Spirifer Kentuckensis. 
Nore.—The necessity of the changes of nomenclature in the references to the fossils here noticed are explained in one 
case by the note on page 102, and the synonymy under SPIRIFER CAMERATUS, same page, will explain the reason of the change 
in that instance. The fossil referred to PRODUCTUS PUSTULOSUS proves, on comparison, to be a distinct species ; and the speci- 
mens referred to TEREBRATULA ROISSYI prove to be SPIRIFER LINEATUS— these species resembling each other in form. Mr. 
has very recently proposed for the narrow and much incurved variety of Grypuza Prrcvert, (if it be indeed that 
species,) the name of Navia. 
