84 BULLETIN 36, UNITED STATES NATIONAL MUSEUM. 



2. LiKjviiorln/iichunfit-rotji Waterboiise. 1840. 



3. La(jeiwrliijiiclit(8 (ilbirostris Gray. 184(). 



4. Laytnorli ijncli us clectra Gray . 1846. 



Syu. L(i(jenorhi/nchus asia Gray. 1846. 

 Phocwna ptctoralis Peale. 1848. 

 DelpMuus fusiformis Oweu. 1866. 



5. Lagenorhynchus criiciger d'Orh'i'j^uy jiutl Gcrvais. 1847, 



Syu. Lagenorliynchus clanculus Gray. 184U. 

 Lagenorhynchus latifrons (Paris Museum). 

 C. Lagcnorhy)ichiis thicolea Gray. 1849. 



Syu. Lagenorhynchus hrcviccpsoi Waguer. 



7. Lagenorhynchus obliquidens Gill. 1865. 



8. Lagenorhynchus superciUosas Scblegel. 1841. 



2. Species Tkansferked to the Genus by Previous Wkiteu.s, but which I 



llEGAKD AS BELONGlN(J ELSEWHERE. 



Lagenorhynchus lateralis of Cassiu. Upou Delphinus lateralis, Pealc. 



Lagenorhynchus cwruleo-albus of Gray. Upon Delphinus cwruleo albus, Meyou. 



? Lagenorhynchus albirostratus of Dall. From a skull supposed to be identical with 



Delphinus albirostratus, Peale. 

 Lagenorliynchus de Castelnau of Van Beuedeu. 



3. Nominal Species, Uxdescribed, ok Described only from Individuals Seen 



AT a Distance. 



Delphinus cruciger Qnoy and Gaimard. 

 Delphinus albigenus Quoy aud Gaimard. 

 Delphinus biciltata Lessou and Garuot. 



SPECIES INCORRECTLY REFERRED TO THE GENUS. 



1. Lagenorhynchus lateralis Cassiu. 



Upou Delphinus lateralis Peale. U. S. Explor. Exped., viii, Manim. & Ornith., 1848, 



p. 35, PI. VIII, fig. 1. 



Cassiu assigns this species to Gray's genus Lagenorliynclms without 

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

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

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

 be judged by Peale's figure and description. 



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

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

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

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

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

 number usual in Lagenorhynchus, viz, *[. 



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

 Lagenorhynchus. It will be impossible to say whether it is a Delphinus 

 or Prodelphinus, unless more external characters distinguishing those 

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

 most probable that Peale's dolphin belongs to Prodelphinus aud is closely 

 allied to P. marginatus (Davernoy). 



* Cussin, U. S. Explor, Exped., Matam. aud Ornith., 1858, p. 33. 



