200 PATAGONIAN EXPEDITIONS I 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. APORRHAIDA1 Phil. 



Gen. APORRHAIS da Costa. 



130. APORRHAIS ARAUCANA (Philippi). 



PI. XXXIII, Fig. 9. 



1887 Chenopus a. Philippi, Tert. & Quart. Verst. Chiles, p. 35, pi. i, f. i, 

 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, i 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. 15) 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. 



