DESCRIPTION OF FISHES. 203 
serrations are well-developed, but they are much finer on the anterior portion of 
the tooth ; this latter character distinguishes it from G. Arcticus. 
The original specimen from which M. Agassiz’s figure is taken is in the Museum 
at Paris, the locality unknown. 
Lamna elegans. (Tab. X. figs. 28, 29, 30, 31.) 
The beautiful teeth of this species are very common at Bracklesham, more so 
than at Sheppey ; the young teeth are finely striated, but the striz are scarcely 
observable in the larger specimens. This species is common in the calcaire 
grossier, and has been also noticed in the crags*. 
three triturating tubercles, but the dentine of which they are composed is confluent, being rolled 
round like a scroll in the substance of the bone, one edge forming the margin of the tooth, the other 
buried in the centre.” 
I subjoin the Nomenclature proposed by Sir Philip Egerton of the Edaphodontide, as far as they 
relate to the Chalk and Eocene formations. 
Subclass ELASMOBRANCHII, Bonap. 
Order Hotoceruaut, Miiller. 
Family EparHopontipz, Owen. 
Epapuopon, Buckland. 
Proc. Geol. Soce., vol. ii. 
Bucklandi, dgass.. Upperand at E. latidens, Buck., sp. inedit. [SH UEEY/ meeoconconesoteotcs | 
aes OR Agass., vol. iii. p. 351... | Bagshot sand and 
eurygnathus, 4yass Premaxillary ... | Passalodon, Buck. ............ Pan Soc., vol. ii. Bracklesham. 
— , Agass. : psi) cenccaecceceqas5n 
Wipper maxillary |iennccascssennectensessecoseseetvens Agass., vol. iii. p. 352... 
—— gigas, Egert. ...... Premaxa)larieseee eescccsonetscanscssescedarsescesiacet aed eee ae nae ees 
—— helveticus, Egert.. Lower maxillary — ....+..sseceseseeeeeees Recnccanesnes a AEE aaa Meee, Ss 
: : Proc. Geol. Soc., vol. ii. 
) Upper and lower | E. angustidens, Buck., sp. in- 2 Y Bagshot sand and 
epwoauaniaus, 4058. maxillary ...... COI ecvevecnsencvesescseences REY sponse tosis Bracklesham. 
Agass., vol. iii. p. 351... 
— Mantelli, Buck. ... Lower maxillary Chimera Mantelli, Buck. ... P REG eee eee and 
— Sedgwicki, 4gass. Lower maxillary Chimera Sedgwicki, dgass... Reneroun lesen bridge. 
Erasmopus, Egerton. 
— Greenovi, dgass... Lower maxillary Chimera Greenovi, 4gass.... Agass., vol. iii. p. 350... Unknown. 
—— Hunteri, Owen .... Lower maxillary ......... pdoonedntccobossesecticcacs Odontography, p. 66 ... She athe 
——s ,—— . Premaxillary ... Scaphodus, Buck., inedit. ... Odontography, p. 66 ... sie ppey ude Tack: 
* In the cabinet of Dr. Robertson at Chatham, there is a portion of the jaw of this Shark with 
several teeth in it, found at Sheppey. : 
