SPECIAL WORK. 
Mamin . 33 
lc. ChinchillidjE. 
\Tetrastylus montanus , n. sp., F. Ameghino, Rev. Arg. Hist. Nat. i, 
pp. 94 & 95, Tertiary, Argentina. 
+ Sphiggomys \_Sphingomys , R. L.] pueraster , + puellus, n. spp., Tertiary, 
Patagonia, Ameghino, t. c. p. 143. 
iPerimys perpinguis, + planaris , n. spp., ibid., Ameghino, t. c. p. 144. 
\Lagostomus egenus , p. 145, Tertiary, La Plata, t striatus, Maminosus , 
p. 245, Tertiary, Parana, n. spp., Ameghino, t. c. 
• J t Gyrabrius glutinatus , n. g. & sp., Ameghino, t. c. p.246, Tertiary, 
Parana. 
1 . fEoCARDIIDiE. 
+j Eocardia elliptica , p. 145, ijissa, p. 146, Ameghino, Rev. Arg. Hist. 
Nat. i, Tertiary, Patagonia : n. spp. 
\Phanomys vetulus, n. sp., Ameghino, l. c. ibid. 
Procardia, n. subg., Ameghino, t. c. p. 302 ; type, Eocardia elliptica , 
Amegh. 
^ \Dicardia maxima, n. subg. & sp., imodica , iexcavata, n. spp., Ameghino, 
l. c., Tertiary, Patagonia. 
^ Tricar dia, n. subg., p. 302 ; tyj e, Eocardia divisa, Amegh. ; t gracilis , 
icrassidens, p. 303, n. spp., Tertiary, Patagonia ; Ameghino, t. c. 
1 1 Schistomys crassus , n. g. & sp., Ameghino, t. c., p. 303, ibid. 
m . Oastoroidtdj:. 
Moore, J. Description of a New Species of Gigantic Beaver-like 
Rodent. J. Cincinn. Soc. xiii, pp. 26-30, pis. v & vi (1890). 
. Concerning a Skeleton of the Great Fossil Beaver, Castoroides 
ohioensis. T. c. pp. 138-169, figs. (1890). 
The first paper describes an incisor from Georgia, regarded as indicating 
a new species of Castoroides, but subsequently, t. c. p. 103, referred to a 
recent Hippopotamus. The second paper describes, with figures, a nearly 
entire skeleton of Castoroides, obtained from Indiana, in 1889. 
+ Castoroides georgiensis , n. sp., Moore, t. c. p. 30 ; subsequently with- 
drawn. 
f Loxomylus angustidens, n. sp., Burmeister, An. Mus. B. Aires, iii, 
pp. 384-387, pi. vii, fig. 3, Tertiary, Argentina. 
n . Cayiid^e. 
Beddard, F. E. Notes on the Anatomy of DolicJiotis patagonica. P. Z. S. 
1891, pp. 236-244, woodcuts. 
It is considered that the genus is allied to the Dqsyproctidce rather 
than to the Ily stridden. 
1891. [VOL. XXVITT.] C 3 
