STEREORNITHES, CATHARTIDIFORMES. • Aves 45 
Family Stereornithid;e. 
[Iid. t. c. p. 21.] 
'I Slereornis, n. g. (fossil). Type, S. rollieri ; F. P. Moreno & A. Mer- 
cerat, An. Mus. La Plata, i, p. 21, pi. ix, fig. 3, pi. x, figs. 1 & 2, pi. xi, 
fig. 1. S. gaudryi , n. sp. (fossil), iid. t. c. p. 21, pi. ix, fig. 4, pi. x, fig. 3. 
[ Vide supra, p. 33.] 
Mesembriornis studeri, n. sp. (fossil), iid. t. c. pp. 21 & 22, pi. iv, figs. 2 
& 3, pi. vii, fig. 4, pi. x, fig. 4, pi. xi, figs. 2-4, pi. xii, figs. 1-G. M. quatre- 
fagei , n. sp. (fossil), iid. t. c. p. 22, pi. iv, fig. 4, pi. xii, figs. 7-9, pi. xiv, 
fig. 1. M. milne-edwardsi , n. sp. (fossil), iid. t. c. pp. 22 & 23, pi. xiii, 
figs. 1-6, pi. xvi, fig. 3. [ Vide supra, p. 33.] 
■J Patagornis , n. g. (fossil). Type, P. marshii , n. sp., iid. t. c. p. 23, pi. xiv, 
figs. 2-11, pi. xv, figs. 1-3. P. lemoinei, n. sp. (fossil), iid. t. c. pp. 23 & 
24, pi. xv, figs. 4 r 6. P. baclimanni , n. sp. (fossil), iid. t. c . p. 24, pi., xv, 
figs. 7-10. 
Family Dryornithid;e. 
[Iid. t. c. p. 24.] 
^ Dryornis , n. g. [fossil]. Type, D. pampeanus , n. sp. ; iid. t. c. p. 24, 
pi. xvi. [ Vide supra , p. 33.] 
Family Darwinornithid^. 
[ lid . t. c. p. 24.] 
^ Darwinornis, n. g. (fossil). Type, D. copii, n. sp. (fossil) ; iid. t. c. 
p. 24, pi. xvii, figs. 1 & 2. D. zitelli, n. sp. (fossil) ; iid. t. c. p. 25, pi. xvii, 
figs. 3 & 4. D. socialis, h. sp. (fossil) ; iid. t. c. p. 25, pi. xvii, fig. 5. 
[ Vide supra, p. 33.] 
\J Owenornis, n. g. (fossil). Type, 0. affinis, n. sp. ; iid. t. c. p. 25, 
pi. xvii, fig. 6, pi. xviii, fig. 1. 0. lydeJcJceri, n. sp. (fossil), iid . t. c. p. 25, 
pi. xviii, figs. 2-5. [ Vide supra, p. 33.] 
Order CATHARTIDIFORMES. 
Cathartes fossilis, n. sp., figured ; F. P. Moreno & A. Mercerat, An. 
Mus. La Plata, i, pi. xix, fig. 15, pi. xx, fig. 19. 
Sarcorhamplius fossilis, n. sp., iid. t. c. p. 27, pi. xviii, fig. 9. [= S. gry- 
phus ; F. Ameghino, Rev. Arg. i, p. 444.] 
v PsilopUrus, n g. (fossil). Type, P. communis, n. sp. [pi. xviii, fig. 1, 
pi. xxi, fig. 5] : P. australis , n. sp. [pi. xviii, fig. 10, pi. xx, fig. 5] : P. 
intermedins, n. sp. [pi. xx, fig. 2] ; F. P. Moreno & Mercerat, An. Mus. 
La Plata, i, pp. 26 & 27. 
[Referred to the Batitai ; F. Amegiiino, Rev. Arg. Hist. Nat. p. 444. 
[ Vide supra, p. 33.] 
