212 PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 



according to the original figure, the living form is broader and less elon- 

 gated. F. domeykoanus, of Philippi, is mentioned by v. Ihering as re- 

 sembling the Patagonian species, but he says that Philippi's sentence: 

 "apertura superius subcanaliculata " does not apply to it. But this cana- 

 liculation is well shown in our specimens, and agrees perfectly with Phi- 

 lippi's figure. On the other hand, I do not think that F. subreflexus of 

 Sowerby (1846, p. 259, pi. 4, f. 57), from Navidad belongs here. The 

 latter has the upper part of the whorls concave, and the general outline, 

 especially of the last whorl, and the ornaments are a little different. Since 

 Philippi does not give any comment on Sowerby's figure or diagnosis 

 (1887, p. 45, pi. 2, f. 8), but simply copies the former, we are to suppose 

 that really another species agreeing with Sowerby's F. subreflexus exists 

 at Navidad. 



Our specimens, on the average, differ from Philippi's figure of F. domey- 

 koanus only in being a little more slender, but there is variation in this 

 respect among our material, as is shown by the measurements given 

 above. Philippi's figure still more approaches, in this respect, the living 

 F. dilatatus than our specimens do. 



F. encodes Philippi (p. 45, pi. 2, f. n), also from Navidad, seems to be 

 only a variety, and agrees in outline better with our individuals. 



F. steinmanni Moericke (1896, p. 570, pi. n, f. 18, 19), from the'Plio- 

 cene Coquimbo-beds of Caldera, Chili, is very closely allied, but the tuber- 

 cles are less developed. Partly exfoliated individuals of our species, 

 where the tubercles are more or less gone, resemble F. steinmanni very 

 closely, so that I was inclined at first, when I had only such poor mate- 

 rial, to take it for that species. 



Record of specimens : Mouth of Santa Cruz River, 24 sp.; Las Salinas, 

 i cast. 



Distribution: Santa Cruz, Patagonian beds (v. Ih.); Navidad, Chili 

 (Phil., Moer.). 



Affinities: As has been demonstrated above, S. domeykoana is repre- 

 sented in the Pliocene beds of Chili by S. steinmanni, and in New Zea- 

 land by S. dilatata, which has been found in Miocene and Pliocene beds 

 (see Hutton, 1873, p. 3, and 1886, p. 348), and still lives there. 



Among the European species the Miocene F. virgineus Grat (Hoernes, 

 1856, p. 286, pi. 31, f. 10-12) might be compared with this one, but it is 

 more slender, and the sculpture, although of the same type, is a little dif- 



