ORTMANN : TERTIARY INVERTEBRATES. 195 



In the American Tertiary we have one species that is apparently very 

 closely allied to ours : T. apicalis Heilprin from the Pliocene beds of 

 Florida. Especially in what Dall (1892, p. 316, pi. 16, f. 10) calls the 

 typical form of T. apicalis, there are two principal ribs, on the upper and 

 lower part of each whorl, with a third and smaller intermediate one, and 

 besides, a number of fine spiral striae: a type of ornamentation that 

 agrees completely with that of T. ambulacrum. (I have compared and 

 verified this character in 6 specimens of this form from the Caloosahatchie 

 beds in the Princeton Museum). In T. apicalis, however, the principal 

 ribs are distinctly and regularly granulated, and the suture is less deep. 

 Thus T. apicalis corresponds very closely to T. cingulatiformis of Moe- 

 ricke (Pliocene of Chili), which is, according to Moericke, the Pliocene 

 descendant of T. affinis = ambulacrum of the Navidad beds. 



This comparison of the morphological characters of T. ambulacrum 

 with those of T. apicalis would accordingly, for T. ambulacrum, point to 

 an age a little older than that of the Pliocene T. apicalis, i. e., to Miocene. 



T. aldingce Tate (1893, p. 336, pi. 8, f. i) from the so-called "Eocene" 

 of South Australia (Aldinga Bay) comes very near to T. ambulacrum, 

 but the suture is not so deep. 



125. TURRITELLA BREANTIANA d'Orbigny. 

 PI. XXXI, Fig. 14' . 



1847 T- breantiana d'Orbigny, in: Voy. Astrolabe et Zelee, Geol. Atlas, 



pi. 5 (Paleont, pi. 2), f. 36, 37. 



1887 T. breantiana Philippi, Tert. & Quart. Verst. Chiles, p. 77, pi. 9, f. ib. 

 1889 T. couteaudi Rochebrune & Mabille, in: Miss. Cap Horn, v. 6, p. 



44 (no locality). 



1897 T. tricincta v. Ihering, in: Rev. Mus. Paul., v. 2, p. 287, pi. 3, f. 3 

 (non T. tricincta Hutton, 1873, p. 13). 



1898 T. iheringi Cossmann, in : Rev. crit. Paleozool., v. 2, p. 109. 



1899 T. iheringi Ameghino, in: Seg. Cens. Nac. Rep. Argent. Supl., p. 4. 

 1899 T. breantiana var. indecussata v. Ihering, in: N. Jahrb. Miner., etc., 



v. 2, p. 26. 



Shell large, very elongate, forming an angle of about 12 to 16. Suture 

 not very deep, whorls flat with 3 thick principal revolving ribs, the upper- 

 most the strongest. Ribs, especially the uppermost, crossed by lines of 



