604 



MOLLUSCA 



SUB-KINGDOM VI 



structure is reduced to the merest rudiment. Jurassic Chondrophoridae approximate 

 closely to recent members of the same family. All the evidence at our disposal 

 justifies the conclusion that Mesozoic Cuttle-fishes possessed an essentially similar 

 organisation to that of recent forms. 



[The rendering into English of the original text for the chapters on Mollusca, exclusive 

 only of the Dibranchiates (Grundzuge, pp. 250-435), was performed by Dr. John C. Merriam, 

 Professor of Palaeontology in the University of California. His careful translation greatly 

 facilitated the labours of Professors Dall, Pilsbry, and Hyatt in their revision of the several 

 groups accredited to them. TRANS.] 



Restoration of MeganRura Monyi Brongt. 

 Brongniart). See page (584. 



FIG. 1260. 

 Carboniferous ; Cornmentry. 



i/ 6 natural size (after Charles 



