Tlte Intumesens Fauna. — Clarke. 91 
LvnuUcardium sp. nov. (a), (with spines on the lunule: also in the 
Kaples beds). 
Ltinulicardium sp. nov. (b). 
Nueula sp.? cnf. diffidens Hall, (also in the Naples beds). 
Lucinaf ? cnf. siiborhicularis Hall, (also in the Naples beds). 
Lucina? f sp. nov., (also in the Naples beds). 
Cardiola (Buchiola) retrostriata von Buch, (not uncommon; very 
abundant in the Naples beds). 
Cardiola doris Hall, (also in the Naples beds). 
Strophcdosia, a small species like S. truneata Hall). 
Chonetes lepida Hall. 
Leiorhynchus sp. ? 
Lingula spatulata Vanuxem (also in the Naples beds). 
Orhiculoidea, (a very small species). 
Cladochonusf sp. 
Melocrinus clarkii Williams, (also in the Naples beds). 
Clado.rylon mirabile Unger. 
Dadoxylon elarkii Dawson, (also in the Naples beds). 
Dadoxylon iiewberryi Dawson. 
CyclostUjitia affine, Dawson. 
Lepldodeiidron primcevum Rogers (Dawson's identification. Also in 
the Naples beds). 
Lepidodendron gaspiannm Dawson. 
This association of organisms was brolieu up with the closing 
of the comparatively brief period of time represented bj- the Styliola 
layer, and only occasionally do representatives of the fauna ap- 
pear scattered through the overlying mass of dark shales. A 
few forms, e. g. Cardiola retrostriata, Loxonema noe, Pleuroto- 
maria itys, var. tenuispira, return in the upper levels of the 
series, in association with characteristic Genesee species, Lunuli- 
xiardium fragile, etc. 
Thereupon follow the compact greenish sandy shales with thin 
laminated sandstones, which characterize the Cashaqua shales, or 
base of the "Portage" series. 
The lower beds of these greenish shales and flags alternate with 
two or more considerable beds of black shale, which are, at times, 
exceedingly bituminous and very heavy-bedded, but usually some- 
what arenaceous, in other words, are ver}' like the Genesee beds 
beneath. The characteristic fossils of the Genesee beds do not, 
however, reappear at these horizons as far as known; indeed, the 
onh- inyerteljrate fossil that has been found here is an interesting 
goniatite allied to G. chemungensis Hall, and described by the 
writer as a variet}- of that species ; a form with a multilobate 
septal suture like G. clavilohus Sandberger, a lower Upper Devon- 
