ORTMANN I TERTIARY INVERTEBRATES. 2 1 I 



Remarks: There are slight variations in the external form ; some speci- 

 mens are less slender: Height, 30 mm (not complete, but damaged to 

 about the same extent as the specimen given above) ; diameter, 12.5 mm. 

 The number of longitudinal ribs is 1 1 in one individual, in all others 8-9. 

 I am not quite satisfied as to the generic position of this shell. 



The specific name has been given in honor of Mr. H. A. Pilsbry, of 

 Philadelphia. 



Record of specimens : Mouth of Santa Cruz River, 5 sp. 



Gen. SIPHONALIA Ad. 

 142. SIPHONALIA DOMEYKOANA (Philippi). 



PI. XXXIV, Fig. 4. 



1887 Fusus domeykoanus Philippi, Tert. & Quart. Verst. Chiles, p. 45, pi. 



2, f. 10. 

 1896 F. d. Moericke, in: N. Jahrb. Miner., etc., Beil. Bd. 10, p. 569. 



1899 Siphonalia dilatatavzx. stibrecta v. Ihering, in : N. Jahrb. Miner., etc., 

 v. 2, p. 30. 



1900 Fusus domeykoanus Ortmann, in: Amer. Journ. Sci., v. 10, p. 380. 

 Shell large, biconically-fusiform, with 7-8 whorls ; whorls angulated, 



last whorl large. Angulation with a spiral series of large tubercles, 

 10 ii in one volution, tubercles blunt, conical, situated, on the upper 

 whorls, at a little distance over the suture, continued downward, on .the 

 last whorl, as short longitudinal ribs. Upper part of whorls (above the 

 tubercles) oblique, flat. Whole surface with numerous, crowded, strong 

 spiral striae. Mouth ovate, angulated on the outer lip, and slightly canal- 

 iculate at the upper end. Canal about as long as the mouth, open, slightly 

 curved. 



Measurements of a complete individual : Height, 98 mm, diameter, 

 48 mm ; of another : height, 94 mm, diameter, 53 mm ; of an individual 

 with an upper and lower end incomplete: height, 114 mm, diameter, 

 63 mm. 



Remarks: V. Ihering refers this form to the New Zealandian living and 

 fossil (Miocene upward) species Fusus dilatatus Quoy & Gaimard (1832, 

 p. 498, pi. 34, f. 15, 1 6), and this species is, no doubt, closely related, but, 



