420 



NEW YORK STATE MUSEUM 

 PLATE 13 



Genus kochia Freeh 



Page 269 



Kochia ungula sp. nov. 



Page 270 



I, 2 Two views of a left valve, showing the arched contour, 

 incurved and recurved beak. The specimen has suffered 

 some compression which has lessened its actual curvature 



3-5 A series of small arched valves 



6 A flat valve which provisionally is regarded as the right valve 



of this species, xi.5 



7 Another of these flat valves incomplete on the right margin 



which gives it the expression of reversal with reference to 

 figure 6. It is believed that both represent like valves, xi.5 



8 Cardinal view of an internal cast of the arched valve from 



which the umbo has been removed showing the cardinal 



structure. X2 



Chautauqua subprovince Correll's point, Lake Erie 



Genus loxopteria Freeh 



Page 271 

 [See pi. 14] 



Loxopteria dispar Sandberger (sp.) 



Page 272 



9 A nearly entire left valve showing contour and surface charac- 



ters, xi. 5 

 10, 11 Left valves, xi.5 

 12, 13 Right valves. X2 



14 Surface of the left valve. X3 

 15-17 Incomplete right valves 



Chautauqua subprovince Forestville 



Loxopteria vasta sp. nov. 



Page 275 



18 A large right valve 



Chautauqua subprovince Forestville 



