134 True On South American Delphimdce* 



For the sake of brevity I have cited the earlier paper by it's* 

 date, 1893, and the later one by 1896, adding the proper page- 

 number. 



"Delphinus? supercifiosus Lesson-" (1803, p. 6, pi. 1, fig. 2). 



Dr. Philippi copies Lesson's figure of this species and makes 

 a few remarks regarding it, but mentions no new material. It 

 seems hardly probable that the species belongs to the genus* 

 Delphinus* The shape of the snout would rather indicate 

 Lagenorhynchus y though the coloration is not characteristic of 

 that genus, 



" Delphinus earuleo-albus Meyen'" (1898, p, 6, pi. l r fig, 1). 



This species, the type-skull of which I examined in 1887, be 

 longs to the genus Prodelphinus. (See Bull. 36, 1L S. Nat, 

 Mus., p. 62.) 



"Delphinus amphitriteus Philfppi" (1893, p. 7, pL 1, fig. 3), 



The osteological characters of this species are not given, nor 

 is the skull figured, and it is uncertain, therefore, whether it 

 belongs to the genus Delphinus or Prodelphinus. The proba 

 bilities are much in favor of the latter. Dr. Philippi compares 

 it with cceruleo~albu9, but points out differences of color and 

 proportions by which it may be distinguished from that species. 

 In this he is no doubt justified, though as cceruleo-albus is a 

 South American species and its range of color variation is un 

 known, later observations may show that there is a closer rela 

 tionship between these two forms than can now be made out. 

 It is interesting to note the resemblance between amphitriteus 

 and the Delphinus marginatus of Pucheran, which I consider 

 identical with Prodelphinus euphrosyne (Gray); also between 

 the former and the Delphinus later alis of Peale, which is like 

 wise probably a Prodelphinus (See Bull. 36, U. S. Nat. Mus., 

 pi. 15, figs. 1 and 3). 



