550 



Anxals of the Carnegie Museum. 



Chazy. 

 Sciilifcs ain^iilatiis, 

 Jhtcania siilcatina, 

 RapJiistoma sfai/iiiieiir/i, 

 Rap]iistoi)ia ii/n/iafunn/i , 

 Camerella longirosfris, 

 lilcciius g/o/>osiis, 

 Thaleops ovata, 

 Leperditia canadensis, 

 Camerella varians, 

 Hehertella cxfoliafa, 

 Ortlioceras sp. , 

 Remap! eiirides canadensis, 

 Tsatelns Iiar/'isi, 

 Pliomerops ca na den sis, 



Plattsburgh. 

 Sca/i/es ani^a/a/us, 

 Bucania sulcatina, 

 Raphistotna stamineum , 

 RapJiistoma ivimaturuin, 

 Camerella loni^irostris, 

 Ilheni/s globosus, 

 Thaleops ovata, 

 Leperditia canadensis, 

 Malocystites sp., 

 Hehertella luilgaris, 

 Zygospira aciitii-ostris, 

 Eitnema Iiistoricin/i , 

 Eiirxchilina latiniari^inata. 



Third. The Glapliiints piistulatiis faunule. This faunule is found 

 at Valcour Island, Chazy and Cooperville, New York, and on Isle La 

 Motte, Vermont. It always accompanies reef conditions. These reefs 

 are made up of great masses oi Stromatocerium and are usually accom- 

 panied by lenticular beds of a very pure buff-colored dolomite. 

 With the Stromatocerium there are usually corals and bryozoans. On 

 Sloop Island there are great masses of Fletclieria incerta near the 

 jjcriphery of the lenticle of dolomite, and at Cooperville there are 

 great quantities of the massive bryozoans, and Styhvrea parva. 



The fossils in these reefs occur in jiockets, and while the species 

 vary in different localities, GlapJiiinis pustiilatiis is always present and 

 is always accompanied by a great number of cei)halopods. On Valcour 

 Island, the principal species of the faunule, aside from the cephalopods, 

 are Glaphiirns pustulatus, Pliomerops canadensis, IlUcnus glohosns, 

 Illaums erasti/si, Isotelus harrisi and Remopleiirides canadensis. At 

 Chazy, neither Pliomerops canadensis nor Isotelus harrisi have been 

 found, but Amphilichas niinganensis is abundant. F'urther north, at 

 Cooperville, the principal species are Glaphurus pustulatus, Amphili- 

 chas /niugancnsis, Isotelus harrisi and Ilhrnus erastusi. The faunule 

 is composed almost entirely of trilobites and cephalopods, brachiopods 

 being few and gastropods and pelecypods being almost entirely want- 

 ing. This faunule occurs at the base of Division 3. 



