INIA GEOFFRENSIS AND PONTOPORIA BLAINVILLII. 115 
easily be made the type of a distinct subfamily, were it not for the difficulty of placing 
the numerous osculant forms, Psewdorca, Grampus, Lagenorhynchus, &c. 
In the following tabular view of the arrangement of the Cetacea, many of the genera 
lately formed, chiefly by subdivision of the old genus Delphinus, are not introduced. 
It must not be be inferred from this that I question their validity, though such as are 
founded on skulls alone may require revision when the entire skeleton is known. But 
as the present object is to determine the position of Inia and Pontoporia in the order, 
it is only necessary to mention the well-established and generally recognized generic 
divisions. 
Order CETACEA. 
Suborders. Families. Subfamilies. Genera. 
i . Balena. 
Baleonidse sem sieletevsienetes ete Balesmines erie ates] > = 
I. Mysracocet1* [ Eubalena. 
Balenoides Megapterine..........++ Megaptera. 
| Balenopteride ......... Piiysuiue: 
Sibbaldius. 
Balenoptera. 
Physeter. 
( Physeterinw......+.+++- { Kogia. 
Berardius. 
Ziphius, 
| Dioplodon. 
\_ Micropteron. 
Physeteride .......... j Hyperoodon. 
or Platanistide .........+ 
II. Opontocetrt Platanistine............ Platanista. 
Delphinoidea. 
aF 
it are aie { Bonny’ 
Monodon. 
Beluga. 
- Phoceena. 
| Delphinide .........-.. Weolievis; 
Grampus. 
Orca. 
Delphinine? ......-..- Pseudorca. 
Lagenorhynchus. 
Delphinus. 
Delphinapterus. 
\_ Globiocephalus. 
* pvorak, xpros ; equivalent to the German “ Barten- Walle.” + Glovs, Knros. 
