BRITISH FOSSILS. 



3 



Affinities. — The dermal characters of this species associate it very 

 closely with Ptycholepis Bollensis ; the individual scales, however, 

 are proportionately longer and narrower, and differ in the arrange- 

 ment of the sculpture. I have evidence of a third species occurring 

 with the two former, in the lias of Lyme Regis, in which the scales 

 are still more elongated ; but the subject of the present memoir is 

 easily distinguished from the other members of the genus, by the 

 striking proportions of the fish described above. 



Localities. — The only specimen I have seen of this species was 

 found in the lias beds, between Lyme Regis and Charmouth. It is 

 the property of Mr. Beccles, of St. Leonards-on-Sea, to whom I am 

 indebted for permission to figure and describe it. 



Explanation of Plate. 



Fig. 1. Ptycholepis curtus, size of nature. 

 Fig. 2, 3. Scales magnified. 



P. DE M. Grey Egerton. 



May 1853. 



