^2 BULLETIN OF THE LABORATORIES 



Platyceras hlvolue, M- and W. ? 



A single specimen is doubtfully identified with this species. 



Quite small, very ventncose, composed of (less than) two closely 

 coiled rounded volutions; spire not elevated; inner w^horl minute, 

 outer whorl very rapidly expanding, ventricose, expanding especially 

 downward; section of volution broadly ovate, broadest externally; 

 aperture with a faint sinus on the upper and lower external aspects. 

 With the last. 



Platyceras sp. Cf. p. paraliinn, M and w. 



(Plate I, Fig. 23, (Fig. 32?) 



We have a few specimens resembling F. paraluim, which differ 

 from the above in having a well defined revolving ridge and groove of 

 the upper surface. The spire is minute and the aperture not very 

 oblique. With the above. 



Dentaliinn grajivillensiSj ^p- "• 



Closely related with grandcevum, Win. 



Shell large, straight, oval in section ; tapering about .078 in one 

 inch, marked except near the aperture by fine thread-like stride which 

 cross the surface nearly at right angles and are more or less regular. 

 Casts are nearly perfectly smo )th. This species most nearly resem- 

 bles D. canna, but is always oval in section. The striae nearly seem 

 to cross the shell at right angles and on well-preserved specimens are 

 strong and elevated. No evidences of longitudinal markings were 

 seen. The length may have exceeded 8 cm. The longest fragment 

 measures 49 mm. The longer diameter at the apertural end is 9 mm, 

 at the apical 5 mm; another 50 mm. long measures aperturally 10 

 mm, apically 6 mm, or about 8 mm contraction per cm. D. gran- 

 dsevum is said to expand more rapidly, but may not prove distinct. 



Free stone at Granville. 



Goniatites hjoni, M. and W. 

 Fragments apparently indistinguishable from this species were col- 



