



42 2 NEW YORK STATE MUSEUM 



PLATE 14 



Genus loxofteria Freeh 



Page 271 

 [S>*pl. 13] 



Loxopteria laevis Freeh 



Page 274 



1-4 Right valves, showing the depressed surface and sharply 

 elevated wing. All X2 except figure 3 which is an enlarge- 

 ment of the umbonal region showing the larval concavity at 

 the beak. X5 



5-7 Left valves, xi.5 



Chautauqua subprovince Forestville and Gowanda 



Loxopteria (Sluzka) intumescentis sp. nov. 



Page 276 



8-14, 16, 17 A series of left valves showing the usual aspect and variations 

 of these shells in different growth stages. Figure 16 is a 

 cardinal view showing the vertical area below and behind 

 the beak. Figure 10 shows a portion of the surface with 

 the large larval shell. Figure 17 is an elongate shell of 

 quite usual outline. Figure 10, X3 ; 11, X2 ; 12-14, XI «5 \ 

 16, 1 7, X2 ' 

 Chautauqua subprovince 



Walnut creek, Forestville and Correll's point, Lake Erie 



Loxopteria (Sluzka) corrugata sp. nov. 



Page 277 



15, 18-26 A series of left valves showing the variation in the character 

 of the corrugated surface. Figure 15, 19-21, X2 ; 22, X3 ; 

 23, X2 ; 24, xi. 5; 25, 26, X2 

 Chautauqua subprovince 



Forestville and Correll's point, Lake Erie 



