880 BULLETIN UNITJiD STATES GEOLOGICAL SURVEY. [TolY. 



HeliornitliidaB. 



1840. Brandt, J. F. Einige Bemerkungen iiber Podoa und ihr Verhaltniss zu Fulica, 

 Podiceps und den Steganopoden. <^ Mem. de VAcad. St.-Petersb. , vi s^r. , v tome, 

 ii pte., Sc. Nat.,ui, 1840, pp. 197-202, pll. xi, xii. 



A subtitle, being the third part of his series entitled: Beitxage zur Senntniss der Natnrg. 

 Vogel u. 8. w. — Podoa is associated with Fulica, in the order Natatoreg. 



1848. Gray, G. E. Description of a new specie^ of Podica [P. personata]. <^ P. Z. S,, 



xvi, 1848, p. 90. 



1849. Gray, G. R. Description of a new species of Podica [P. personata]. <^Ann. 



Mag. Nat. Hist. , 2d ser. , iii, 1849, pp. 311, 812. 

 From P. Z. S., June 13, 1848, p, 90. 

 1861. GiEBEL, C. G. Ueber Podoa surinamensis. <| Zeitach. f. d. gesammt. Naturwisa., 



xviii,1861,pp.424 . 



Nicht mir selbst zuganglich. — Enthaltend anatomisches. 



1867. SCHLEGEL, H. Urinatores < J/«s. Hist. Nat. Paya-Bas, 9« livr., avril 1867, pp. 

 1-52. 



This group, as made up by the author, consists of the five families Spheniscid<e, Alcidce, 

 Colymbidce, Podicipidce, and Heliornithidce, of three of which only a single genus is admitted. 

 Spheniseus, 12 species. 



In the Alcidce, with 3 genera, are treated of Alea, 9 spp. ; Simorhynchus, 6 spp. ; Landa, 3 

 spp. Colymbus, with 3 spp. Podiceps, with 12 spp. Heiiornin, with 3 spp. 



