200 
PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 
compare them. But I describe and figure them in order that they may 
be recognized if found again. 
Record of specimens : Mouth of Santa Cruz River: 3 fragments ; San 
Julian, Darwin Station: 2 fragments. 
Fam. APORRHAIDAR Phil. 
Gen. APORRHAIS da Costa. 
130. Aporrhais araucana (Philippi). 
PI. XXXIII, Fig. 9. 
1887 Chenopus a. Philippi, Tert. & Quart. Verst. Chiles, p. 35, pi. 1, f. 1, 
1900 Aporrhais a . Ortmann, in: Amer. Journ. Sci., v. 10, p. 379. 
Shell fusiform, smooth. Upper whorls carinato-angulated, last whorl 
bicarinate ; upper keel indistinctly nodulose or merely waved. Outer lip 
dilated, produced into two fingers, and a short process appressed to the 
spire and directed toward the apex. 
Height of fragment: 17 mm; diameter, 10 mm. 
Remarks: I have at my disposal only one single incomplete individ- 
ual ; the lower digit of the outer lip is broken away, as well as the lower 
canal. Otherwise it agrees completely with Philippi’s species, with the 
exception that the upper carina is slightly waved, thus giving a suggestion 
of granulations or tuberculations. 
Record of specimens : Mouth of Santa Cruz River, 1 sp. 
Distribution: Navidad beds of Chili: Lebu (?) (Phil.). 
Affinities: Species of Aporrhais with carinated whorls (type: A. pes 
pelecani L., Miocene-Recent, see Hoernes, 1856, p. 194, pi. 18, f. 2-4) 
begin in the Oligocene beds (. A . speciosa Schloth., see Speyer, 1864 a. p. 
166/ pi. 31, f. 1-5) of Europe, and continue up to recent times, and it is 
to this group that A. araucana bears the closest resemblance, as has al- 
ready been pointed out by Philippi. In the lack of distinctly developed 
nodules, and in the lack of a third (lower) carina on the last whorl, our 
species differs strikingly from these. 
