84 BULLETIN 30, UNITED STATES NATIONAL MUSEUM. 



2. La(jei>orliyinihusfit:roiji Waterbonse. 1840. 



3. Lagenorhijnchus albirofitris Gray. 1846. 



4. Layeiiorh ij nchtis clectra Gia^ . 184G. 



Sj'u. Ltujtnorliynchus asia Gray. 1846. 

 Phocauia pectoralis Peale. 1848. 

 DclpMnus fuslformis Oweu. 1866. 



5. Lagenorhynchits craciger fl'Orbi<^uy aud Gervais. 1847. 



Syu. Lagenorhi/nchus clancultis Gray. 184U. 



Larjenorhy It chits Jatifrons (Paris Museuui). 



6. Lorieiio7'hyiichiis thicolea Gray. 1849. 



Syu. Laoenorhynchun hrcviccpn oi Waguer. 



7. Lagoiorhyiicliiis obHqiiidens Gill. 1865. 



8. Lagenorliynclius superciliosus Schlegel. 1841. 



2. Species Transferked to the Genus uy Previous Writers, but which I 



REGARD AS BELOXGIN(; ELSEWHERE. 



Lagenorhynvhus lateralis of Cassiu. Upon Delpltinns lateralis, Peale. 



Lagenorliynclius cwriilvo-albus of Gray. Upou Delphinns ca'mleo albus, Meyen. 



? Lagenorhijnchus albirostratiis of Dall. From a skull supposed to be ideutical with 



Delphinns albirosiratns, Peale. 

 Lagenorhynvhns de Castelnaii of Van Beuedeu. 



:3. Nominal Species, Undescribed, or Described only from Individuals Seen 



at a Distance. 



Delphinns crn( iger Quoy and Gaimard. 

 Delphinns albigcnns Quoy aud Gaiuiard. 

 Delphinns bivittata Lesson aud Garuot. 



SPECIES INCORRECTLY REFERRED TO THE GENUS. 



1. Lagenorhytichus lateralis Cassiu. 



Upou Delphinns lateralis Peale. U. S. Explor. Exped., viii, Mauim. &, Ornitb., 1848, 



p. 35, PI. VIII, tig. 1. 



Cassiu assigns this species to Gray's genus Lagenorliynclius without 

 giving any reason for so doing. He states that he was unable to "tlnd 

 auy specimen in the collection of the expedition."* I have been equally 

 unsuccessful in finding auy traces of it. The species must, therefore, 

 be judged by Peale's figure aud description. 



The figure in question represents a dolphin having a long beak, such 

 as exists in Belphinus aud Prodclphinus, and which does not at all re- 

 semble the short plowshare-like beak of Lagenorhynclius. Again, the 

 style of coloration is more like that which obtains in JJelphinus or Pro- 

 delphinus than that of Lagenorhynchus. Finally, the teeth exceed the 

 number usual in Lagenorliynclius, viz, ^|. 



For these reasons, taken together, I should exclude the species from 

 Lagenorliynclius. It will be impossible to say whether it is a Del-phinus 

 or Prodelpliinus, unless more external characters distinguishing tho^e 

 genera are brought forward. On the whole, however. It seems to me 

 most probable that Peale's dolphin belongs to ProdelpMnus and is closely 

 allied to P. niarginatus (Duvernoy). 



* Cassiu, U. S. Explor. Exped., Mauiui. aud Oruitb., 1858, p. 33. 



