80 THE ROYAL SOCIETY OF CANADA 



thus correspond with the earlier stages of submergence represented 

 by the lower part of the sub-division C. 



About 75 species have been distinguished from Mr, Church's 

 collection, most of which have been previously described by Whiteaves 

 from material secured in the same locality. Of the remainder, six are 

 small pelecypods which are not included in this paper. Ptiloteuthis 

 foliatus appears to be the species described under that name by Gabb, 

 and is here figured and described as being previously unknown in this 

 locality. The two Goniomyas' may also be identical with species 

 already described from the interior of the continent. The Gervillia 

 figured is probably, though not certainly, Whiteaves' G. newcomhii. 

 The remaining ten are undoubtedly new species. 



Description of New Species. 

 CRUSTACEA. 



A few fragments of pitted crustacean tests of quite undeterminable 

 character. 



MOLLUSC A. 



Cephalopoda. 

 (Dibranchiata). 



Ptiloteuthis cf. foliatus (Gabb) , see Geol. Surv. Cal. Palaeontology, 

 vol. II, p. 128. Two specimens of the gladius. 



(Plate I, Fig. la, b) 



The largest specimen secured is imperfect, l)otli at the ends and along 

 the lateral margins, but appears to have been originally about six inches 

 long as compared with a total length of 3 «5 inches in the specimen 

 figured and described by Gabb. The width must have been about 3 

 inches. A smaller specimen preserves the posterior end which was 

 previously unknown, but is here shoAvn to be rather evenly rounded 

 with a margin somewhat crenulate in part. In this specimen, however, 

 there are some indications of a knotted or cordate structure in the 

 radiating ridges. These ridges also appear narrower in proportion 

 to the intervening 'wrinkles' than in the other specimen, which may be 

 explained by supposing that the exposed surfaces of the two specimens 

 represent opposite sides of the gladius. On the other hand it is quite 

 possible that the smaller specimen is of another species. 



Locality, south side of Alliford Bay. 



