224 LILLJEBOEG ON THE 



Notes to the annexed Synoptical Table of the Genera. — Altliougli only the Cetacea belonging 

 to the Scandinavian Fauna will be taken under notice in the following memoir, I considered that the 

 foreign genera should also be mentioned in the table, in order to show the connection of the native 

 genera with the others, and consequently the position that they occupy in the system. 



The genus Delphinus, as here described, corresponds with the genera Lagenorhynchus, Delphinus, 

 and Steno, of J. E. Gray,^ as the differences between those genera, as defined by that author, are 

 such, that they seem to run into each other through modifications occurring in forms belonging 

 to them. 



The second genus Levcorhamphiis corresponds with Gray's" Delphinapterus, with its species 

 D. Peronii. As the beluga or Delphinus leucas is the type of the genus Delphinapterus, as defined 

 and described by Lacépéde,^ it seems that the name should belong to its right owner, and not 

 be transferred to a different species. I have therefore been obliged to find another generic name for 

 Delphinapterus Peronii {Delphinus Peronii, Lacep.) ; and have, as I knew no name more suitable, 

 selected that of Leucorhamphus, which was given by Peron as its specific name. The genus Orca 

 con'esponds with the genera Grampus, Globiocephalus and Orca of Gray.* 



The generic name Neomeris, given by Gray^ to Delphinus phocænoides, G. Cuvier, ought to be 

 changed for some other name, having been given as early as 1816, by Lamouroux, to a genus of Polypi; 

 but as it has up to this time been known as belonging to the species in question, I have been 

 unwilling to change it. 



The genus Pontoporia, as constituted by Gray," seems properly to run into the genus Inia, and 

 may be included with it. 



I will finally remark that the genera Leucorhamphus, Neomeris, Inia, Platanista, Delphinorhynchus, 

 Berardius, Kogia, and Catodon, are foreign to the Scandinavian Fauna. 



1st Genus — Uelphinus, Linné. 



Nose or fore part of the head more or less elongated and pointed, generally with a con- 

 spicuous notch above. Blowers united into a single transverse opening on the upper side of the 

 head, far behind the tip of the snout. Back with a fin, sometimes at the middle of the body, 

 sometimes before, and sometimes behind the middle. Body fish-shaped, and sharply tapering 

 towards both ends. Jaws armed with a great number (20 or more on each side in each javi^) of 

 conical teeth, generally pointed. 



The fore part of the skull (the beak) is limited behind by a sharp indentation on the outer 

 side of the upper maxillary, and is of a conical, tapering form, more or less elongate, sometimes 

 shorter, but generally longer than the hinder and larger part of the head. Both jaws with teeth. 

 'J'he symphysis of the lower jaw-bones is shorter than half the length of these bones. The 

 skeleton generally is distinguished by a large number of lumbosacral vertebræ, and, indeed, of 

 vertebræ generally. 



Species of this genus are found in all seas, and are generally more lively and active in their 

 motions than those of the genera with blunt noses. 



^ 'Zoology of the Voyage of Erebus and Terror,' "Mammalia," part v, p. SO. 



2 L. c. 



^ ' Histoire Naturelle des Cétacées,' p. xli. 



* L. c. 5 L. c. ^ L. c, p. 46. 



