'The Taconic — Marcou. 73 
logical proofs, except that he has called Diplogj-aftus pristis 
the Graptolipthus simplex of Emmons. He declares that the 
majority of the species of graptolites described by Dr. Emmons 
from his Taconic system, are now known to occur also in the 
Hudson group, in the valley of the Hudson and elsewhere, 
saying: "that proves that Dr. Emmons had not a clear idea of 
the position of the shales of the Hudson river valley that con- 
tain the graptolites described by Prof. Hall, nor of the shales 
at Pointe-L^vis carrying the graptolitic fauna." 
Previously in the palteontological part, I have presented 
some objections against Mr. Walcott's opinions on the grapto- 
lites of the Taconic system, and now I shall add a few strati- 
graphic remarks, in order to show who has "a clear idea of 
the position of the shales" containing the graptolites. 
Mr. Walcott lays great stress (in order to remove the "red 
slates" containing graptolites from the Taconic) on the discovery 
of Mr. C. E. Beecher, north of Dudley observatory on the line 
of the New York Central railroad; saying: "At Albany N. Y., 
however, the graptolite beds contain a characteristic Trenton- 
Hudson fauna. This removes a considerable portion of the 
Upper Taconic strata from the Taconic system" {^Loc. clt. p. 
322). Mr. Walcott does not give any approximate thickness 
of what he calls "a considerable portion of the Upper Taconic." 
As presented in Mr. Walcott's footnote p. 322, it seems a nec- 
essary conclusion that the graptolite beds of the Taconic area 
belong to the Utica slate of the Dudley observatory of Albany. 
Another "Petit-cceur case. — Now we have at the Dud- 
ley observatory an abnormal association of fossils — three species 
of graptolites ( Clunacograptus bicornis, Dicranograpttis ra- 
mosus and Dlplograptus mncro?tatus) found by Mr. Walcott in 
the Taconic slates of Washington and Rensselaer counties, mixed 
with Lamellibranchia, sixteen species; Brachiopoda, five spe- 
cies; Pteropoda, two species; Gasteropoda, three species; Ceph- 
alopoda, two species ; Annelid, one species ; Crustacea one species, 
and Trilobites, two species — which have never been found be- 
fore nor since anywhere else, and more especially in the whole 
original Taconia area, in Canada and in the original Utica- 
Lorraine area of central and northern New York. 
Mr. Walcott has neglected to report with accuracy the state 
