PLATE CVIir. 



NAUTILnS MAQISTBR. 

 Page Hi. 



See Plates 62, 105, 107. 

 Fi^. 1. A latei-al view of a nearly entire individual of this species. The septa and filling of the air-cha«ihera 



are much broken at the mai'gins, and the outer margin »t the grand chamber is everyyvhere 



incomplete. 

 Kg. 9. A posterior view of tlje same specimen looking upon the ventral side of the air-chambers, , -and 



showing the great width of the chamber of habitation. Hamburgh, Erie county, If. T. 



