248 General Notes. [ April, 
brought to light and they will be found much more perfect than those 
of the crystalline rock. In one locality Cyrtolites compressus (Con.) 
seems almost to form the basis of the stone. So abundant is it that a 
fragment could not be broken out without bringing to light some portion 
of a shell. Chetetes lycoperdon H. is also abundant, universally ap- 
pearing on weathered surfaces in connection with Hscharopora recta H., 
Stictopora acuta H., and other corals of a like nature, and crinoidal stems. 
Chetetes is detected in the body of the rock only by the diverging 
canals seen in a longitudinal section. The curious glabelle of /sotelus 
Jowensis, or a related trilobite, is often seen in connection with fragment- 
ary remains of other crustaceans. The textile markings of Strophomena 
Jfilotexta H. and the rays upon the shell of S. alternata H. are well pre- 
served, while in the upper layers only casts of a very imperfect kind 
were seen. Many other brachiopods are quite abundant, as Rhynconella 
capax Con., Orthis testudinaria Dal., Strophomena deltoidea H., ete. 
Orthis subquadrata H., is not uncommon, I think, in both layers. Lin- 
gulæ have been found throughout the series, Lingula quadrata and forms 
which may prove to be juvenal and distorted specimens of the same. 
Among gasteropods the Trenton limestone here is found to contain 
Pleurotomaria lenticularis H., P. subconica H., P. subtilistriata H., 
common to both divisions. With regard to the last, a specimen of this 
species which Professor Hall mentions as having been found only in the 
concretionary beds of Trenton at Watertown, N. Y., was found in the 
upper layers at Minneapolis, the size corresponding with that of the 
largest seen by Professor Hall. Pleurotomaria umbilicata H. is exceed- 
ingly abundant in the upper rock and a supposed cast of Murchisonia 
gracilis was broken from the same horizon as Cyrtolites compressus. 
e shale on weathering leaves well-preserved shells and corals which 
appear almost as perfect as though collected from their native waters, 
particularly Chetetes, Rhynconella, and sections of crinoid stems in great 
variet 
Lamellibranchs are not wanting in all portions, the following having 
been noticed: Hdmondia subangulata H. (one specimen). Æ. sub- 
truncata H. (very abundant but quite variable in form. Casts alone 
have been found.) Nucula levata H., as well as several as yet not 
determined. — C. L. Herrick. 
Warreaves’ Mesozoic Fossits or Bririsu CoLumsia. — The 
fossils described and figured in this report of Mr. J. F. Whiteaves, palæ- 
ontologist to the Geological Survey of Canada, are mostly cephalopods, 
particularly Ammonites from the coal-bearing rocks of the Queen Char: 
lotte Islands. The author states that “what little direct and positive 
evidence is at present afforded by the fossils from the Queen Charlotte 
Islands is in favor o’ their being referred to the Cretaceous period. 
Again he says more explicitly on page 91, “ While, on the one hand, the 
fossils described in these pages show that the probable geological posi- 5 
