x 74 
PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 
Height, 9 mm; diameter, 3.5 mm (v. Ihering gives: height, 19; diam- 
eter, 7 ; Cossmann : height, 5 ; diameter, 2 mm). 
Remarks : One of our specimens is isolated, and it is smaller than v. 
Ihering’s, but larger than Cossmann’s. The only difference of Cossmann’s 
species is the small size and small number of whorls (5—6). Our in- 
dividual is exactly intermediate in these respects between both, and so 
there is no doubt that Cossmann’s species is only the young stage of this 
species. The fold on the inner lip is well seen in our specimen. The 
other specimen in our collection is larger, but as it is imbedded in matrix, 
no exact measurements can be given. 
In the use of Odontostomia for Odostomia I follow Dali (1892, p. 248). 
Record of specimens: Mouth of Santa Cruz River, 2 sp. 
Distribution: Jegua quemada, Suprapatagonian beds (v. Ih., Cossm.). 
Affinities: According to Cossmann, this species is distinguished by the 
angulated whorls from the Eocene species of France. I do not know any 
other species in which this feature is shown, except a variety of O. con- 
oidea Brocchi (Dali, 1892, p. 250). This variety is mentioned by Wood 
(1848, p. 86), from the Pliocene of England. He says ‘/the angulated 
edge of the volution gives a subcanaliculated form of suture to another 
variety” (fig. 3a on pi. 9). 
O. conoidea is found from Miocene to Recent times in Europe, the 
United States, and the West Indies. 
Gen. TURBONILLA Riss. 
106. Turbonilla cuevensis v. Ihering. 
Pi.' xxxiii, Fig. S' 1 - 6 . 
1897 T. c . v. Ihering, in: Rev. Mus. Paul., v. 2, p. 276, textf. 11. 
1899 T. iheringi Cossmann, in: Journ. Conchyliol., p. 13 (of sep. cop.), 
pi. 10, f. 12. 
1900 T. c. Ortmann, in: Amer. Journ. Sci., v. 10, p. 380. 
Shell elongate-pyramidal, surface with longitudinal ribs and indistinct 
spiral striae. Longitudinal ribs about 20 on the last whorl, not extending 
to the base. Whorls flat, suture distinct and sharply canaliculate. Mouth 
ovate, columella with an indistinct fold. 
