ORTMANN ! TERTIARY INVERTEBRATES. 
1 8 1 
1899 T. m. v. Ihering, in: N. Jahrb. Miner., etc., v. 2, p. 25. 
1900 Infundibulum clypeolum Ortmann, in: Amer. Journ. Sci., vol. 10, p. 
380. 
Like /. corrugatuni , but shell much depressed, without radial ribs, and 
with strong concentric striae. 
Our largest individual measures: Height, 12 mm; diameter, 30 mm; 
v. Ihering gives: Height, 21 mm; diameter, 54 mm. 
Remarks: I hardly believe that this is a good species. We have seen 
that in /. corrugatuni the radial ribs sometimes disappear, and that the 
external form is very variable ; indeed, we possess individuals, which are 
much more depressed than the typical I. clypeolum , but have distinct ribs. 
But until the relations of the living /. clypeolum and corrugatuni are set- 
tled, I am not prepared to make any change in the accepted nomenclature 
of these fossil forms. 
Record of specimens : Mouth of Santa Cruz River, 2 sp. 
Distribution: Fossil: Santa Cruz and Jegua quemada, Patagonian and 
Suprapatagonian beds (v. Ih.). 
Recent: Straits of Magellan. 
Gen. GALERUS Gray. 
1 12. Galerus araucanus (Philippi). 
PI. XXXII, Fig. 7“’ 6 . 
1887 Trochita ar . Philippi, Tert. & Quart. Verst. Chiles, p. 92, pi. 11, f. 1. 
1900 Galerus a. Ortmann, in: Amer. Journ. Sci., v. 10, p. 379. 
Cast subcircular, conical, more or less depressed. Spiral diaphragm 
forming an impression on the cast running down from the apex to the 
periphery, and occupying not more than about one-fourth of the circum- 
ference. A second impression, very much shorter, starts also from the 
apex, and has been formed, apparently, by the reflected part of the dia- 
phragm. Of the outer surface of the shell only a few traces are seen, and 
it was apparently smooth. 
Height, 8 mm; diameter, 19 mm. 
Remarks: That the second, shorter impression on the cast is formed 
by the reflected margin of the diaphragm, is positively shown by an indi- 
vidual from Lake Pueyrredon, in which the apex of the cast is broken 
