EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 69 



Poleumita sp. 



Represented by inferior specimens of shells with whorls finely costated 

 by spiral riblets. 



Locality. Moosehead lake ; Baker Brook point. 



Coelidium sp. cf. tenue Clarke 



Set p. 23, 99 



These specimens are referred with some doubt to the Aroostook county 

 species. Though similar in form they are quite uniformly of larger size and 

 seldom show any evidence of the slit band. 



Locality. Moosehead lake, 7 miles north of Kineo. 



Tropidodiscus cf. obex Clarke 



Plate 12, figures 20, 21 

 See p. 99 



Specimens apparently of this species are present but too badly pre- 

 served to identify with security. For the most part they are somewhat 

 larger than those from Edmunds Hill. 



Localities. Matagamon lake dam, north side; Moosehead lake, 7 miles 

 north of Kineo. 



Plectonotus derbyi Clarke 



Plate 12, figures 17-19 

 See p. 98 



These specimens are entirely comparable with those noted from 

 Edmunds Hill, Aroostook county, agreeing with them in size, which seems 

 to be uniformly below the adult size of the Brazilian specimens. 



Localities. Matagamon lake, i mile above dam on the east side ; 

 Cunningham's camp. 



Cyrtolites expansus Hall 



Plate 12, figures 14-16 



Cyrtolites ? expansus Hall. Palaeontology of New York. 1859. 3:479,1)!. 114, 



fig- 4, 5 

 Cyrtolites expansus Clarke. N. Y. State Mus. Mem. 3. 1900. p. 28, pi. 3, 



p. 20-23 



Specimens of this species agree closely with those from Becraft moun- 

 tain, N. Y., without attaining the dimensions represented in Hall's figures 

 from specimens in the Oriskany of Albany and Schoharie counties. 



Locality. Cunningham's camp, 4 miles southwest of Matagamon 

 lake. 



