84 CONTRIBUTIONS TO DEVONIAN PALEONTOLOGY. [bull. 244. 
Kings Mill sandstone is placed in the Catskill formation, although he 
found in it, and in the overlying shales, fossils which he identified as; 
typical Chemung- species. The formation name was evidently applied 
because of the red shales and the Iloloptychius beds, and he supposed 
that these beds were ''passage beds between the Chemung and the 
Catskill, during the formation of which Catskill conditions more and] 
more prevailed, rendering the seas less and less congenial to the Che- 
mung fauna, until the latter became extinct; and then followed that 
vast accumulation of red sandstone and shale almost destitute of I 
organic remains, except those of fishes, which is usually recognized as 
the Catskill formation."" 
hi conclusion it is to be noted that not a single species of the list of 
15 diagnostic Chemung species mentioned on page 57 of this bulletin 
is found in the 2,000 feet of strata of this Catawissa section. 
FAUNAL CORRELATIONS OF CATAWISSA SECTION. 
By H. S. Williams. 
Regarding the paleontological evidences presented in this section, 
the following comments may be made: 
The first fossiliferous zone (1 to 3) contains the normal fauna of the 
Hamilton formation, as shown by the dominance of TropidoleptuM 
carinatus, Chonetes coronatus, Phipidomella vanuxemi, Spirifer )><n- 
natus, S. granulosus, and Phacops rana, and the presence of S. medial is, 
Palwoneilo emarginata, Modiomorpha concentrica, Cypricardella beiliA 
triata, and Cyclonema hamiltonide. 
Zone 4 may be correlated, on account of its lithological similarity and 
in the absence of detected fossils, with the Genesee formation. 
Zone 6 contains a fauna which is common in the Nunda (Portage) 
formation both above and below the horizon of the Ithaca fauna, and 
in sections in which the latter is absent. It is recognized by the pres- 
ence and association of such species as Buchiola speciosa, Pterochamia 
fragile and Lunulicardium curium. It contains Chonetes and Lingula 
but rarely species of any other genera of brachiopods. 
The fossiliferous zone, extending from 7 to 26 inclusive, contains a 
fauna typical of the Ithaca member, as it is seen at Ithaca, N. Y. 
The diagnostic species are Spirifer pennatusxar. posterus, Sp. mesistrm 
alls, Aetinopteria perstrialis, Leiorhynclius mesicostale, Productella 
speciosa, Cystodietya nieeki, and Stropheodonta (Leptostrophia) intern 
strialis. The thickness here is 700 feet. At Ithaca, N. Y., the fos- 
siliferous zone, which is characteristic, is not over 400 feet thick. 
Reticularia hevis appears in the Catawissa section 280 feet above the base 
of the fossiliferous zone. This first RetLcidaria Imvis faunule occupies 
much the same position, in the sequence of development of the general 
Second Pennsylvania Geol. Survey, Kept. F 2, p. 76. 
