3°6 
PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 
The Punta Arenas section (Ortmann, 1898, p. 481) has been mentioned 
twice before in literature. First Mallard and Fuchs (1873, p. 67, ff.) 
have given a profile taken at 6-7 kilometers from Punta Arenas on the 
left bank of the river (Rio de las Minas). There does not seem to be 
any agreement with Mr. Hatcher’s observations, but the fact that these 
writers mention at the base of their section, a glauconitic sand, which 
contains u O street patagonica ” and a large Pectunculus (= Glycimeris), 
renders it beyond doubt that this bed corresponds to Hatcher’s horizon 
V, which consists of a dark green sand containing a large oyster (O. 
ingens ) associated with a large Pectunculus ( Glycimeris ibari). Thus 
Mallard and Fuchs’ section begins just where Hatcher’s section ends. 
A second time this section has been mentioned by Nordenskjoeld (1898, 
p. 24, footnote). His account agrees fairly well with Hatcher’s, and the 
comparison is as follows (beginning at the top) : 
Sand, Sandstein und Geroell in maechtigen 
Schichten, unten mit etwas Lignit 
includes probably horizon V (Patagonian). 
Schieferthon mit Lignit und Pflanzenresten 
(Araucaria) 
undoubtedly = horizon IV (Upper Lignites). 
Sandstein mit einer muschelfuehrenden Bank : 
reichlicheSchalen von Ostrea bourgeoisi und 
torresi. 
= horizon III (Ostrea torresi). 
Sand mit kalkigen Einlagerungen (mit Stein- 
kernen schlecht erhaltener Mollusken) 
probably beds separating horizons II and III. 
Muschelfuehrende Bank ( Ostrea fehlt ; Turri- 
tella und andere Gasteropoden vorhanden) 
= horizon II (Turrit ella exigna). 
Sand und Sandsteine mit kalkigen Konkre- 
tionen, die schlecht erhaltene Pflanzenver- 
steinerungen enthalten (Fagns) 
= horizon I. 
Lignitische Schicht. 
The plant remains of our horizons I and IV have been described by 
Dusen from the collections made by the Swedish expedition (Dusen, 1899). 
He provisionally refers the upper Lignites (horizon IV ; Araucaria- beds) 
to the Miocene , and the horizon I ( A^/LS'-beds) 1 to the Oligocene (p. 93), 
although it may be Eocene (p. 91). 
1 1 have been able to identify some of the plant remains collected by Hatcher in horizon I, 
namely, Fagns subferruginea Dus. (p. 94), Nothofagns variabilis forma viicrophylla Dus. (p. 97), 
and others, which are identical with forms mentioned by Dusen from the Fagns beds of Punta 
Arenas. This establishes beyond doubt the identity of our horizon I and the “ Fagns beds” of 
Dusen. 
