Leptostrophia magnifica Hall 



(See plate 21) 

 Page 87 



20, 21 Internal casts of ventral valves 

 Locality. Matagamon lake dam 



Chonetes nectus Clarke 



Page 86 



22, 23 Exteriors of ventral valves, x 3 



24 Interior of dorsal valve, x 3 



25 Exterior of ventral valve, x 3 



Locality. Tomhegan point, Moosehead lake 



Chonetes (Eodevonaria) hudsonicus Clarke 



Page 86 



26, 27 Internal ventral casts showing the cardinal denticulations 

 Locality. Stony brook, Moose river 



28 A transversely elongated ventral valve 

 Locality. Tomhegan point, Moosehead lake 



Chonetes impensus Clarke 



Page 85 



29 The shell described, a ventral valve 



Locality. Seven miles north of Kineo bay, Moosehead lake 



Chonostrophia dawsoni Billings 



I'age 87 



30 Internal cast of the ventral valve 



Locality. Seven miles north of Kineo bay, Moosehead lake 



31 Exterior of the ventral valve with cardinal spines 

 Locality. Misery stream, town of Sandwich 



32 Interior of the ventral valve retaining the spines 



33 Exterior of a slightly distorted ventral valve 



Locality. Seven miles north of Kineo bay, Moosehead lake 



207 



