90 PISCES. 



p. 1 22, Plate, xix., figs., 1-3, 1882), and Weybourn Crag, at several 

 localities. A specimen from Felixstow, in the Museum of Prac- 

 tical Geology, is evidence of its occurrence in the Red Crag. 



Prof. Prestwich noticed the presence of this fish in both the 

 Red and Coralline Crags of Suffolk (Quart. Journ. Geol. Soc., 

 Vol. XX VII., p. 132, 1871), and Mr. Lamplugh has specimens 

 from the Bridlington Crag. 



Mr. Fitch, of Norwich, has a bone from the Norwich Crag of 

 Thorpe exhibiting the same peculiar hyperostosis, and in form 

 resembles one of the enlargements seen on the skull of Ephippius. 

 This specimen is provisionally included with Platax Woodivardi. 



There are several bones in* the York Museum, from the Red 

 Crag, of different forms, but all possessing a reticulate inner struc- 

 ture, which seem to be hyperostoses of a similar nature to those 

 called Platax Woodwardi, but their true affinities have yet to be 

 worked out. 



Prof. VanBeneden (Bull. Ac. Roy. Belg.,Ser. 3, Vol. I, p. 119, 

 1881), described several forms from the Antwerp Crag, which he 

 believed to be related to Platax Woodwardi, and for these he 

 established four new species, P. cuneatus, physcteroide, pileum, and 

 costatus ; two other forms he described as new species of Pagrus, 

 namely P. pileatus and P. torus. None of these Belgian species 

 seem to be represented in the English Crags. 



Genus THYNNUS, C. & V. 



THYNNUS SCALDIENSIS, STORMS. 



f 



The occurrence of the genus Thynnus in the Belgian Crag has 

 been made known by Mon?. Raymond Storms (Bull. Soc. Beige 

 Ge'ol., Vol. III., p. 163, 1880), who has given an account of a 

 number of vertebrae from the Scaldisian of Antwerp, and finds on 

 comparing them with the skeleton of the recent Thynnus thynnus, 

 that all the vertebrae, corresponding with those behind the thirtieth 

 of the series, have a greater length in proportion to the width than 

 in this recent species, he has therefore proposed for them the name 

 of Thynnus Scaldisii (more correctly T. scaldiensis). 



Two vertebrae in the British Museum, from the Coralline Crag 

 of Suffolk, Mr. A. Smith Woodward (Ann. Mag. Nat. Hist. Ser. 

 6, Vol. V., p. 294, 1890), has referred to the Antwerp species. 

 After having examined these specimens and compared them with 

 the measurements of the vertebrae of the recent Tunny and with 

 M. Storms' figures and descriptions I see no good grounds for 

 questioning this determination, although there is now evidence of 

 the Tunny (T. thynnus) in the Cromer Forest-bed. 



Mr. Smith Woodward also calls attention to some other scom- 

 beroid vertebrae from the Red Crag of Woodbridge, but these are 

 evidently derived from a much earlier horizon, probably Lower 

 Eocene, and their generic affinities are at present uncertain. 



