Orbiculoidea molina nov. 

 Page 71 



1 Pedicle valve, x 4. Holotype. 



2 Profile of brachial valve, x 3. 

 3, 4 Brachial valves, x 3. Paratypes. 



Silurian : Pitts ford waterlime at Farmer's Mills near Utica 

 N. Y. 



Lingula semina nov. 



Page 67 



5 Pedicle valve, partly exfoliated and showing muscle-scars (syn- 



type). x 3. 



6 Pedicle valve with test preserved (syntype). x 3. 



Silurian: Pittsford shale, Pittsford, Monroe county, N. Y. 



Lingula testatrix nov. 

 Page 67 



7 Brachial valve. Syntype. x 2. 



8 Pedicle valve. Syntype. x 2. 



Silurian : Bertie waterlime, Litchfield, N. Y. 



Lingula subtrigona nov. 

 Page 69 



9 Pedicle valve. Syntype. x 3. 



10 Brachial valve (syntype), with posterior margin of pedicle valvi 



and trace of pedicle groove exposed, x 3. 

 Silurian: Manlius limestone, on Frontenac island near Unioi 

 Springs, N. Y. 



Lingula vicina nov. 



Page 68 



11 Pedicle valve. Holotype. x 3. 



12 Profile of pedicle valve, x 3. 



Silurian: Pittsford waterlime at Farmer's Mills near Utics 

 N. Y. 



Dinobolus canadensis (Billings) 



Page 72 



13, 14 Figure of mold and gutta-percha squeeze. Natural size. 

 Ordovician : Black River group, Watertown limestone, Watet 



town, N. Y. 

 The originals of all figures are in the New York State Museum 



196 -' 



