The Intumescens Fauna. — Clarice. 93 
reappearing constantly together with Spirifer disjunctus in the 
normal Chemung fauna. Directl}^ beneath this level is the last 
known appearance of the fauna of the shales below. 
It has become evident that the original terms applied to sub- 
divisions of the Portage series have a very restricted lithological 
value and must lead to deception in regaixl to the faunal contents 
of the strata. It was for such a reason that the writer has made 
use of the term Naples beds for the former and Naples fauna for 
the latter ; the use of the term Cashaqua would express but a 
part of the truth, and the combination in one appellation of both 
Cashaqua and Gardeau, would gain in ugliness what it lacks in 
precision, 
Atteiition is again brieflj- directed to a peculiar concretionary 
limestone stratum occurring in the Naples beds about half-wa}- 
between the top of the first and the base of the second band of 
black shale. This is a thin, quite persistent laver, bearing a con- 
siderable intermixture of silica and pyrite, in color passing from 
a gra}^ into various shades of green and red. It is a fine example 
of the " Knollen " and " Kramenzelkalke " of the Germans, so 
characteristic of the lower Upper Devonian horizons in "Westpha- 
lia and also described by F. Roemer, Lee, Champernowne and 
most recently by Ussher. This stratum is full of goniatites, 
principally G. intumescens, associated with G. uniangularis, Or- 
tlioceras pacator^ Bactrites sp. , Loxonema noe, and with immense 
numbers of Platystoma minutissimnm. A similar formation is 
not known to occur elsewhere in the Devonian of America, and 
its significance will appear in the comparison of the species of the 
Naples fauna with their representatives in other countries. 
The accompanying list of the species of tliis fauna is neces- 
saril}' incomplete. Man}' interesting forms are undescribed and 
their aflSnities can only be indicated. 
THE FOSSILS OF THE NAPLES BEDS. 
(Intumescens Fauna) 
Palceoniscus devonicxis Clarke, (bituminous bands) 
Acanthodes prisons CldiVko. " " 
Conodonts in considerable variety " " 
Echinocarls whitfteldl Clarke. " " 
Echlnocarisf beecheri Clarke. 
Spathiocaris emersoni Clarke. 
Ooniatltes intumescens Beyrich, {^O. pater soul HaW). These shells 
agree with the typical form of Beyrich's species, that with a rounded 
dorsum, and are much more closely adherent to this type than many 
shells which are referred to this species in the Gorman Devonian. The 
