No. 478] ODONTOPHORAL A P PA HAT IS /.V syanvirs 709 



ments the 'tongue' has tlie same cliaiiisaw-likr nio.lr ,,t' operation 

 throughout the Ce|)lialopo(hi and ( ia^teropoda. Tcrhap- I'aicHa 

 may be taken as the most convenient ilhistration, since the or^an 



and its parts are distinet and well develope,!." Afierdcscrihiiip- 

 the apparatus in Patella, he savs: " li is clear thai die action of the 

 intrinsic muscular bands (ha\ inu' the insertion- < Icsci-il .ed i nnist 

 be to cause the elastic plate [radnhir nuMnl)rau<- j. and with it the 



lages, just like a band over its i)un{w. the cartila,u-es tlieni.sej ves 



