100 



GANOIDEI. 



Genus PYCNODUS, Agassiz, 



The Museum at Ipswich possesses a specimen from the Reel 

 Crag Nodnle-bed of Suffolk, belonging to the genus Pycnodus ; 

 but in all probability derived from beds of an earlier period. 



Genus GYRODUS, Agassiz. 



The Ipswich Museum also has a specimen referable to Gyrodus 

 from the Red Crag Nodule-bed of Suffolk, but doubtless it has 

 been derived from older beds. 



Genus PISODUS, Owen. 



A specimen referable to Pisodus has been found in the 

 Nodule-bed of the Red Crag and is preserved in the Ipswich 

 Museum ; but has no doubt been derived from a Lower Eocene 

 deposit. 



Genus LEPIDOTUS, Agassiz. 

 (SPHJERODUS, Agassiz.) 



In the Ipswich and York Museums there are some large round 

 teeth from the Nodule-bed of the Suffolk Red Crag precisely 

 similar to those of Lepidotus maximus ( = Sph&rodus gigas) and 

 are doubtless to be referred to that genus, and possibly to the same 

 species, having probably been derived from secondary strata. These 

 teeth, however, are likewise very similar to those of the specimen 

 from the Pliocene of Volterrano, referred by Lawley to Sph&rodus 

 cinctus, Ag. (Atti Soc. Tosc. Sci. Nat. Pisa, Vol. II.,fasc. 1, p. 60, 

 1875) and afterwards renamed Chrysophrys LawJeyi by Grervais 

 (Journ. Zoologie, Vol. IV., p. 516, 1875). The latter determina- 

 tion has since been called in question by Dr. Forsyth Major. 

 (Atti Soc. Tosc. Sci. Nat. Pisa, Vol. IV., p. Ill, 1879.) 



Genus ACIPENSER, Linnaeus. 



Dermal plates of the Sturgeon from Mundesley and Sidestrand 

 were recorded as Forest-bed fossils in the Survey Memoir (Vert. 

 Forest Bed, p. 129, 1882), and Mr. Savin has since found another 

 example at East Runton. Mr. Smith Woodward (Proc. Geol. 

 Assoc., Vol. XI., p. 29, 1889) has recognised a fin ray of this 

 genus, from the Red Crag Nodule-bed of Suffolk, in the Reed 

 Collection, York Museum ; and it has also been recorded by Mr. 

 II. B. Woodward (Geology of Norwich, p. 54, 1881) from the 

 Norwich Crag of Bramerton. 



