7() BULLETIN 30, UNITED STATES NATIOx\AL MUSEUM. 



The (le«ciii)lioii given by Dr. Liitkeri* applies almost equally well to 

 a skeleton recently collected by the naturalists of the IJ. iS. FisU Com- 

 mission Steamer Albatross, in the Pacific Ocean, between tlie Galapagos 

 Islands and Panama. The vertebral formula in each is as follows: 



Dr. Liitken's specimen C. 7 ; D.14; L.17; Ca. 34^72 



U.S. Nat. Mus., No. 23302 C. 7 ; D.14; L.18; Ca. 34 = 73 



The relations of tlie processes and foramina of the vertebrje are as 

 follows : 



Dr. Liitken's U. S. Nat. Miia., 

 specimen. No. 23302. 



First foramen xierforans on vertebra number 48-49 48-49 



Last distinct transverse process on vertebra number. 55 5C 



Last neural spine on vertebra number 01 02 



Vertebra without zygopophyses ll( = 3l-41) 10( = .32-41) 



The length of the pectoral fin in the specimen in the National Museum 

 is 25G'"'". The formula of the phalanges is as follows: I, 2; 11, 9; III, 

 7; IV, 3; V, 0. 



The entire skin of this individual was not preserved, but the fins and 

 a piece of skin fvom the side of the body were received with the skele- 

 ton. From these it appears that the dolphin was dark slate-gray above 

 and white below. The darker color, which extends on to the fins, is 

 everywhere mottled with very small blotches of a lighter gray. The 

 white parts appear to have been covered with small streaks and stellate 

 blotches of gray. Measurements of the skull will be found in the fol- 

 lowing table. 



Table of measurements. 

 PRODELPHINUS LONGIROSTIIIS. 



349rt 



1471(1 



H47*fc 



n. n 



a567 



30J9 



12 



14 



21108 



23;i02 



Collection. 



Brit. Mus 



...do , 



...<lo 



Norwich Mas. .. 

 f'anibridgeMus. 

 11. Coll. Surg ... 

 Mus. P.ays-Bas.. 



...do ..; 



LT. S.Nat. Mus.. 

 ...do 



Type of— 



r>. microps 



D. stenorhynchus 



D. lon^irostris.. 



Locality. 



Capo Good Hope 

 ...do .. 



Near Pnuama. 



39.4 

 45. 1 

 47.0 

 Old 44.2 



I 44.0 



42.2 

 42.0 

 42. U 

 43.0 

 39.4 



Ad. 



Cvi. Cm. 



25.3 

 30. 3 

 20.9 

 29.1 

 29.0 

 27.3 

 28.0 

 27.2 

 28,5 

 25.1 



Breadth 

 of beak — 





Cm. Cm. 



6.5 



8.4 

 8.7 

 7.6 

 8.4 

 7.6 

 7.5 

 7.9 

 8.6 

 8.05 



4.3 

 4.3 

 5.3 

 4.2 

 4.6 

 4.5 

 4.6 

 4.6 

 5.2 

 4.5 



Oj). cit., pp. 47, 48. 



