ORTMANN I TERTIARY INVERTEBRATES. l8l 



1899 ^ 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 /. corrugatum, 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 /. corrugatum 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 /. clypeolum, but have distinct ribs. 

 But until the relations of the living /. clypeolum and corrugatum 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. 

 112. GALERUS ARAUCANUS (Philippi). 



PI. XXXII, Fig. ;-. 



1887 Trochita ar. Philippi, Tert. & Quart. Verst. Chiles, p. 92, pi. 1 1, f. i. 

 1960 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 



