94 



BULLETIN 3G, UNITED STATES NATIONAL MUSEUM. 



number of vertebrae, however, aiul the comparative shortness of the 

 transverse processes, are more characteristic of ProiUlphimis. 



In addition to the type at Leydeu, 1 observed at Lonvain a skull 

 and a beak which appeared to belon**- to this species. These I did not 

 have an opportunity to examine closely. While resembling P. ohscurus, 

 however, in general appearance, they differ in having tlat premaxillie. 

 In the complete skull the pterygoids appear to be separate, a character 

 the importance of which is strongly insisted upon by Professor Flower. 

 The beak was purchased from a dealer, and possibly came from Africa. 



Table of measurements. 

 LAGENORHYNCHUS SUPERCILIGSUS. 



V. Horstok. 



LAGENORHYNCHUS ALBIROSTRIS Gray. 

 Lagenorhyiichus alhirostri^, Gray, Aim. A; Mag. Nat. Ili.st., xvii, 1840, p. 84. 



There is, fortunately, no obv^cuiity surrounding this species. Gray 

 correctly characterized Brightwell's specimen as the ty])e of a new 

 species of the genus Lagenorhynchus , and since that time its distinct- 

 ness has not been questioned. 



The most closely allied species is L. aciitus, from which it is dis- 



