i8o 



NEW YORK STATE MUSEUM 



median portion the most elevated and bounded by two longitudinal 

 grooves. Apertural diameter to length of ventral face as i to 2.5 ; 

 of dorsal face as i to 2. The surface is marked only by concen- 



<i 





Hyolithus oxys 



trie striae, arched upward on the dorsal face to correspond with 

 the curvature of the margin ; transverse on the ventral face. 

 Average specimens measure 40 mm in length and 14 mm in aper- 

 tural diameter. 



Loiver Devonic. Grande Greve, P. Q. 



Conularia penouili nov. 



A large species distinctly grooved at the angles and ridged at 

 the middle of each face. The concentric markings are elevated 



Conularia penouili 



lines close together and curving broadly upward. These are 

 smooth on the edge, without ornament, but the interspaces have 



