SPECIAL WORK. 
Mamm. 39 
h. fHoMALODONTOTHERIIDA? ( ASTRAPOTHERIIDjEj . 
See above, under Macraucheniidce , for Cope’s notes on this family. 
Mercerat, A. Sinopsis de la Familia de los Astrapotheriidce (Eoceno 
de Patagonia). Rev. Mus. la Plata, i, pp. 237-257. 
A large number of species of this group from the Tertiary of Patagonia 
are described. The dental formula of the genus A strapotheriwn (of 
which the first known specimen was Nesodon magnus , Owen) is given as 
i. c. y, p. f, m. §. The new forms are mentioned below. 
In Rev. Arg. Hist. Nat. i, pp. 332-338, Ameghino criticizes the above 
paper, and concludes that Listriotherium and Xylotherium are founded 
upon young individuals of Astrapotherium , while none of the new species 
of the latter will stand. The recognized species of Astrapotherium, are 
A. magnum , giganteum , nanum , columnatum , and dclimitatum. 
f Homalodontotherium segovice, n. sp., Ameghino, Rev. Arg. Hist. Nat. 
i, p. 295, Tertiary, Patagonia. 
* f Diorotherium egregium , n. g. & sp., Ameghino, t. c. p. 296, ibid. 
f A strapotherium angustidens,\). 246, f voghti, p. 248, f burmeisteri, p. 249, 
■ \marshi , p. 250, f gaudryi, f robustum, p. 251, Tertiary, Patagonia, Mer- 
cerat, Rev. Mus. la Plata, i ; j* A . columnatum , \delimitatum , f nanum, 
f giganteum, Tertiary, Patagonia, Ameghino, p. 298, Rev. Arg. Hist. Nat. 
i : n. spp. 
Astrapodon carinatus , n. g. & sp., Ameghino, t. c. p. 299, ibid. 
Listriotherium patagonicum , n. g. & sp., p. 252, \filholi , n. sp., p. 253, 
Mercerat, Rev. Mus. la Plata, i, Tertiary, Patagonia. 
f Xylotherium mirabile, n. sp., Mercerat, t. c. p. 254, ibid. 
Of Uncertain Family. 
4" Adianthus buccatus , n. g. & sp., Ameghino, Rev. Arg. Hist. Nat. i, 
pp. 134 & 135, Tertiary, Patagonia. 
1. fLoPHIODONTIDiE. 
Lophiodon isselensis ; remains provisionally assigned to this species 
recorded by C. J. Forsyth-Major, P.-v. Soc. Tosc. vii, p. 209, from the 
Eocene of Monteponi, Italy. 
m . Equid^. 
Ameghino, F. Observaciones Criticas sobre los Caballos Fosiles de la 
Repfiblica Argentina. Rev. Arg. Hist. Nat. i, pp. 4-17 & 65-88, 
figures. 
A review of the fossil Horses of Argentina, with figures of teeth. The 
species are arranged under the genera Hippidion, Hipp\ojhaplus, and 
Equus. Three species of the latter are recognized, viz., E. argentinus , 
E. curvidens , and E. rectidens. 
