222 NEW YORK STATE MUSEUM 



PLATE 9 



(All originals in the state museum) 



Crania recta sp. nov. 



p. 157 



Fig. 



1 The upper valve with outlines of dorso ventral and lateral 



sections, x 3 



2 Mold of upper valve, with portion of shell attached, showing 



muscular scars, x 3 



3 View of 'another specimen similarly preserved 



Chonetes scitulus Hall 

 p. 159 



4 Pedicle valve of small specimen showing a faint sinus, x 2 



5 A large pedicle valve, x 1 



6 Section of above, x 1 



Camarotoechia pauciplicata sp. nov. 

 p. 162 



7-9 Dorsal, anterior and ventral views of a specimen from the 

 iStafford limestone of Genesee county. All x 2 



10 Pedicle valve of a specimen from which the beak has been 



broken, x 2 



11 Lateral view of the same, x 2 



12 Dorsal valve, x 2 



Camarotoechia prolifica Hall (?) 

 p. 162 



13 DorsaM view of a specimen with beak restored, x 2 



14 Lateral view of the same, x 2 



15 Ventral valve, x 2. The beak is restored from another 



specimen. 



Leptodesma marcellense Hall 



p. 167 



16 Left valve of a small specimen which is somewhat less oblique 



than the typical form, x 3 



17 Left valve of the normal form, x 3 



