ORTMANN : TERTIARY INVERTEBRATES. 20$ 



Record of specimens : Mouth of Santa Cruz River, 2 sp. 



Affinities: The genus Dolium is preeminently recent and tropical. 

 Fossil representatives aside from a doubtful Upper Cretaceous species 

 have been found from Miocene beds upward, so that the presence of 

 this species in the Patagonian beds points distinctly to Neogene age. 



Gen. PYRULA Lmck. (= Ficula Sw.). 

 135. PYRULA CAROLINA d'Orbigny. 



PI. XXXIII, Fig. I4"- 6 . 



1847 P. c. d'Orbigny, in : Voy. Astrolabe & Zelee, Geol. Atlas, pi. 5 (Pale- 



ontol., pi. 2), f. 34, 35. 



1887 Ficula c. Philippi, Tert. & Quart. Verst. Chiles, p. 52, pi. 4, f. 2. 

 1897 F- c - v - Ihering, in: Rev. Mus. Paul., v. 2, p. 293, pi. 4, f. 19. 

 1899 F. c. v. Ihering, in: N. Jahrb. Miner., etc., v. 2, p. 30. 



Shell fusiform, elongated, slender. Spire very short, apex acute. Sur- 

 face with about 22-25 revolving ribs, which are equidistant from each 

 other and equal, crossed by fine, crowded, longitudinal striae. In old 

 shells the revolving ribs become more distant from each other, and at two 

 or three places a single finer one is intercalated. Mouth elongated, canal 

 long and slender. 



Measurements of a complete individual: Height, 52mm; diameter, 31 mm. 



Record of specimens: Mouth w of Santa Cruz River, 19 sp.; San Julian, 

 Darwin Station, i sp.; Lake Pueyrredon, 600' above base, i sp. 



Distribution: Santa Cruz (Phil., v. Ih.), Jegua quemada (v. Ih.); Pata- 

 gonian and Suprapatagonian beds (v. Ih.). Navidad, Chili (Phil.). 



Affinities: This species is closely allied to a Neogene or recent group 

 of species which are closely connected with one another, and differ chiefly 

 in the development of the spiral sculpture. Ficus pyriformis of Gabb 

 (1869, p. 48, pi. 14, f. 4) from the Miocene of California is very near in 

 external form and sculpture (smaller ribs intercalated between the larger 

 ones, are rare), but the number of the spiral ribs is much larger (about 

 40), and they are, accordingly, more crowded. 



F. concinna Beyr. (see Speyer, 1864, p. 184, pi. 33, f. 15, especially 

 fig. I5c), from the Oligocene of Germany is also closely allied : the secon- 



