814 
MAMÍFEROS FÓSILES ARGENTINOS 
Hoplophoras veras n. sp. 
(Pl. LXIX, fig. 15) 
Esta especie se distingue por las placas del centro 
de la coraza, de contorno poligonal regular, no 
oblongas como en la mayoría de las especies, con un 
diámetro de cerca de 4 centímetros y 12 milímetros 
de espesor. La cara externa presenta una figura cen- 
tral de gran tamaño, de contorno circular, de 18 
milímetros de diámetro, completamente plana y de 
superficie casi lisa. Esta figura central está rodeada 
por una fila de figuras periféricas pequeñas, en nú- 
mero de nueve, de tamaño desigual, todas de super- 
ficie plana y casi lisa, separadas unas de otras por 
surcos bien marcados pero poco profundos. En el 
surco que rodea la figura central existen un cierto 
número de perforaciones. 
Las diferencias que distinguen esta especie son 
muy difíciles de explicar por medio de palabras, 
pero saltan inmediatamente á la vista cuando se exa- 
minan las piezas originales. 
Localidad. — Barrancas de los alrededores de la 
ciudad del Paraná. 
Horizonte. — Piso mesopotáraico de la formación 
patagónica (oligoceno inferior). 
Hoplophoras (?) Lydekkeri n. sp. 
(Pl. LXXXIV, fig. 8) 
Hoplophorus (? ), sp. c, Lydekker, Catal. of Ihe Fossil 
Mamvi., in the British Museum. Part. V, p. 133, 
f. 24, a. 1887. 
Esta especie está representada en el Museo britá- 
nico, por la extremidad de un tubo caudal y un tro- 
zo de la parte anterior de la coraza, caracterizán- 
dola Lydekker en los siguientes términos: 
«The following specimens indicate a species appa- 
rently nearly or quite as large as Glyptodon reti- 
culatus. The large terminal disks on the lateral sur- 
faces of the tube of the caudal sheat are separated 
fron one another by a row of small disks, and are fo- 
llowed laterally by a series of enlarged disks, wich 
decrease gradually in size as they reced fron the tip. 
The disk on the dorsal aspect of the tube are sub- 
circular in shape, frecuently concave, and present 
great variation in size; but those on the ventral sur- 
face are more regular in this respect. The scutes of 
the fragment of carapaceare oblong, with the groo- 
ves very indistinctly marked, and with a series of 
hair-pits in the groove surrounding the central 
disk. 
«Although the present form is apparently distinct 
fro malí described species, with the exception of the 
so-called Glyptodon clavipes of Burmeíster, the 
writer thinks it inexpedient at present to assign to 
it a distinct specific ñame. 
«The extremity of the terminal tube of the caudal 
sheat; from the Pleistocene of Uruguay. This speci- 
men, although of considerable larger size, apparen- 
tly agrees very closely with the terminal tube figured 
byBuRMEiSTER, under the ñame of Glyptodon cla- 
vipes, in the «An. Mus. Buenos Aires», vol. II, pl. 
XL, figs. 7 y 8, showingthe irregular arrangement 
of the disks on the ventral surface (fig. 7), and the 
large sub-circular lateral ones (fig. 8), wich de- 
crease regular! y in size from the hindmost one. In 
the terminal tube of a caudal sheath referred by 
Owek to G. clavipes , but wich, as already men- 
tioned, probably belongs to Hoplophorus, the la- 
teral disks are oval, and the two last are much lar- 
ger than the others, while on the ventral and dorsal 
aspects the disks are less numerous and of a deci- 
dedly oval form. The upper surface of the pre- 
sent specimen is represented in the accompanying 
woodcut, where the form of the disks is wel 
sliown. Its transverse diameter ist 0 m l 44, against 
0 m 075 in the corresponding element of H. orna - 
tus. 
«Fragment from the anterior región of a carapace, 
showing nine scutes, wich agrees in the relative size 
with the preceding specimen. The scutes are nearly 
smooth, their central disks being mainly defined 
by a circle of hair-pits, and the peripheral ones 
scarcely differentiated. The scutes form oblong he- 
xagons, and in this respect, as well as in the ab- 
sence of rugosity, agree with those of H. ornatus 
and differ from those of Glyptodon. Their ionger 
diameter is 0 m 052, and thier thickness 0 m 031 .» 
Lydekker no dá nombre á este animal por creer 
pueda ser idéntico con eL llamado por Burmeíster 
Glyptodon clavipes, ignorando sin duda que el 
dibujo de esta especie dado por el ilustre director 
del Museo de Buenos Aires, es como el mismo au- 
tor lo reconoce completamente fantástico y el tubo 
caudal es del Hoplophorus ornatus é incorrecta- 
