282 On the occurrence of Fossiliferous Strata, etc. (Marh, 
b. That Holoptychus and Bothriolepis are not exclusively Cats- 
kill forms ;} or, l 
c. That an immense mass of the Ponent group must be rè- 
moved from its present position and relations. i 
The fossils they contain belong apparently in part to the Che — 
mung group below and the Lower Carboniferous group above. 
Another part is seemingly peculiar. - 
This is not the place to enter upon any discussion of the signif- 
cance of the facts here presented. The following summary maj, 
however, be useful and not without interest. 
The Catskill group—that is, the rocks ying between pee 
of the lowest bed containing Holoptychius and the Lower Car 
boniferous or Vespertine conglomerate—have hitherto been known 
to contain only the following fossils : 
Plants REEE S E E ear Gastropods. sosoo ota topea seve 
Be 
POU eg ou a sie oc o Cephalopods .. i nt 
ROR enses PE E P E O EN o Tanelin RET Ne son 
a ANE A stad o Annelids :.z. e. -cse A 
EDOR TI Sis S BR res o Crustaceans ..... ed 
inches SEENE ere eae o Esus diseka 2 zot 3 
The beds here described of indisputable Catskill age supply 
following results : 
Plants Gastropods. ... ..+++* preset 
Protista o Ce phalo opods NE of 
Polyps.. i oe sess present * Lamellibranchs . .. -ese PERE 
nas Sala nin a even pmesent T Annelids .....se2 2208" ? ot 
Vee hae ane = Crustaceans Se 
BRADA EUD 3 Fishes s.. e ji T 
petap the eases of Cephalopods wid Ankaii remain u 
sented in the Catskill group. 
1. Polyps are oT by the genus NEN 
2. Echin “« ~~ Crinoidal remain: 
3- Siathiite: “ i the genera Spirifera, dingslt and Rhy 
4. Gasteropods «©  « the mma Pleurotomaria, &c. 
5. Lamellibranchs“ n Cypricardites, &c. 
6. Crustaceans *  “ " Beyrichia. 
1 See Proc. Am, Phil. Soc., 1883, “On the occurrence of Folopiycbius 
base of the Catskill.” E. W, Claypole, : 
