218 



NEW YORK STATE MUSEUM 



PLATE 7 



(All originals in the state museum) 



Macronotella ulrichi sp. nov. 



(See pi. 6, fig. 6-16) 

 p. 83 



Fig. 



1 Dorsal view of the valve represented in fig. 10-12 of pi. 6. 



The figure shows the reentrant cardinal area, x 22 



Primitia mundula Miller var. jonesi var. nov. 



p. 80 



2 Internal cast of a small valve showing a tubercle' at the end 



of the sulcus, x 22 



3 Right valve, x 22 



4 Vertical view of same, showing the border, x 22 



5 Another right valve in which the longitudinally arranged 



granules give the surface a striated appearance, x 22 

 Pebbles of groups 5 and 7 



Aparchites minutissimus Hall var. robustus var. nov. 



p. 74 



6-8 Lateral, anterior and ventral views of a right valve, x 17 

 9-11 Lateral, ventral and anterior views of the largest specimen 

 observed, x 20 

 Pebbles of group 5 



Schmidtella crassimarginata Ulrich, voyr. ventrilabiata var. nov. 



p. 75 



12-14 Lateral, ventral and posterior views of a left valve, x 22 

 15 Interior view of a valve showing the cardinal area, x 22 

 16-18 Ventral, terminal and lateral view® of another left valve 

 showing the ventral extension of the border, x 22 

 Pebbles of group 6 



