Sheppard : Fish, etc.,fro7n Chalk of Lines, and Yorks. 189 



to the Natural History Museum. The other portion is in our 

 own collection. 



From the Red Chalk at Speeton we have the greater portion 

 of an unusually large shark vertebra, similiar to those shown 

 in figs. 2 and 3. The diameter of this specimen is 5 J inches. 

 It was formerly in the possession of the late G. Lether. 



The various specimens referred to above are in the geolo- 

 gical gallery at the Hull Museum, thanks to the kindness of 

 Mr. Drake, and I am also indebted to Dr. Smith Woodward 

 for kindly examining and identifying them. 



Other specimens which ought to be recorded are in the Mor- 

 timer Museum, at Driffield, and Mr. Mortimer kindly allowed 

 me to have the loan of some of these for a short time. They 

 consist of a number of large and small vertebrae from the Red 

 Chalk at Speeton. They have been examined by Dr. Smith 

 Woodward, who reports that most of them belong to a Lamna 

 of some kind, whilst one small one is of the Teleostean, 

 Pachyrhizodus. Mr. Mortimer's specimens have been returned 

 to him, and can be seen in the Museum at Driffield. 



Another fossil which does not appear to have been previously 

 found in the chalk of this district, is shewn in fig. 6. I obtained 

 it many years ago in the beds of Lower Chalk exposed on the 

 foreshore at South Ferriby, near the jetty at the chalk pit. 

 At that time I considered the fossil to be a small portion of a 

 large bivalve. Recent examination, however, and comparison 

 with other specimens, shew it to be a good and almost perfect 

 example of Ostrea. Dr. Smith Woodward informs me that it 

 is Alectryonia Ricordeana (Orbigny) Coquana (= Ostrea carinata 

 Sowerby). This species does not appear to have previously 

 been recorded for the chalk of Lincolnshire, and I can find no 

 reference to its occurrence in Yorkshire. 



With fig. 6 are shewn a few other typical North Lincolnshire 

 chalk fossils, all from South Ferriby. Figs. 7, 8, and 9, are 

 examples of the lampshell, Terehratula semiglobosa, a fairly 

 common fossil. Other brachiopods are shewn in figs. 10 and 11. 

 The former is a full-grown and the latter is a young specimen 

 of Rhynchonella cuvieri. 



Fig. 12 represents a small ribbed Ammonite (Puzosia) found 

 on the foreshore near to where the Ostrea (fig. 6) was obtained. 



Fig. 13 is a representation of Belemnitella plena, the charac- 

 teristic fossil of the * Black Band,' at the top of the Lower Chalk. 



A palate tooth of Ptychodus polygyrus is shewn in fig. 14. 



1908 May I. 



