SINCLAIR : TYPOTHERIA OF THE SANTA CRUZ BEDS. 
IO9 
HEGETOTHERIUM. 
Hegetotherium convexum Ameghino. 
Hegetotherium convexum Amegh. ; Revista Argentina de Historia Natural, 
I, pp. 1 33 -i 34 . fig- 30, 1891 ; Enum. Synoptique, etc., p. 19, 1894 
(listed) ; Segundo Censo, etc., p. 15 1, 1898 (listed). 
Size comparable to Hegetotherium mirabile or slightly smaller. M- con- 
siderably smaller than M-, with postero-external angle not pronounced 
and with the inner face very convex. Antero-posterior diameter of M- 
.007 ; of M- .005 ; width of palate between the third molars .020 (’91, 
134 )- 
EIegetotherium minum Ameghino. 
Hegetotherium minum Amegh. ; Enum. Synoptique, etc., p. 19, 1894 ; Se- 
gundo Censo, etc., p. 15 1, 1898 (listed). 
This species is distinguished by its size, a little smaller than H. striga- 
tum (synon. H mirabile ) and by the horizontal ramus of the mandible 
being very low and shortened in front. Length, anterior border of I T to 
posterior border of .041 ; depth of mandible below M T .014 (’94, 19). 
Hegetotherium anceps Ameghino. 
Hegetotherium anceps Ameghino ; Revista Argentina de Hist. Nat., I, p. 
242, 1891, Enum. Syn., etc., p. 19, 1894 (listed) ; Segundo Censo, 
etc., p. 15 1, 1898 (listed). 
Size of Hegetotherium convexum ; M- much smaller than M- but with 
inner face depressed and more or less grooved perpendicularly. Antero- 
posterior diameter of M- .007 ; the same for M- .004 ; length of space 
occupied by the second and third molars .012 (’91, 242). 
BIBLIOGRAPHY. 
Ameghino, Florentine. 
1882 Catalogo de la provincia de Buenos Aires en la Exposicion Continentale Sud-amer., 
March, 1882. 
1885 Nuevos restos de mamiferos fosiles oligocenos, recogidos por el Prof. Pedro Scalabrini 
y pertenecientes al Museo provincial del Parana. Bol. Acad. Nac. de Cienc., T. VIII, 
p. 5, 1885. Also published separately in an octavo of 205 pages. 
1887a Observaciones generales sobre el orden de mamiferos estinguidos sud-americanos 
llamados Toxodontes (Toxodontia) y sinopsis de los generos y especies hasta ahora 
conocidos, pp. 1-66, 1887. 
1887b Enumeracion sistematica de les especies de mamiferos fosiles coleccionados por Carlos 
Ameghino en los terrenos eocenos de la Patagonia austral. La Plata, 1887. 
