597 Dominican Fossils — Maury 133 



Rissoina Sagraiana Guppy and Dall, Proc. U. S. Nat. Mus. No. 11 10, 

 vol. 19, p. 322, 1S96. 



Rissoina Sagraiana Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 

 1585, 1903. 



This species is referable to the section Phosinella Moerch. 

 The shell was first described from the recent fauna of Cuba. It 

 has been found at Bowden, but not heretofore in the Dominican 

 blue clays. 



It may here be noted that Gabb's genus Iopsis was founded 

 according to Guppy and Dall on a young Rissoina and is inval- 

 id. Gabb's unfigured Cerithidea minida seems to be also a Ris- 

 soina. 



Locality. — (Exp'd '16) Bluff 3, Cercado de Mao. (About 

 50 specimens). Bluff 2 (Comparatively rare.) 



Genus Crucibulum Schumacher 



Crucibulum (Dispotcea) cf. pileohim 

 Plate 23, Figure 6 

 We collected twenty-five specimens of a Crucibulum appar- 

 ently closer to the young of C. pileolum than to any other species. 

 Our shells are usually entirely smooth, but a few show the irreg- 

 lar undulations characteristic of the adult pileolum. They are 

 not C. spinosum with which Gabb identified his Dominican spec- 

 imens. They may be a new species. 



Localities. — (Exp'd '16) Bluffs 2 and 3, Cercado de Mao. 



Genus Xenophora Fischer de Waldheim 



Xenophora conchyliophora Born 



Trochus conchyliophorus Born, Mus. Cses. Ind., p. 333, 1778. 



Trochus agglutinans Lamarck, Anim. sans Vert. 7, 14. 



Phorus agglutinans Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 241, 



1873. 

 Xenophora conchyliophora Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 



2, pp. 360-362, 1892: Bull. 90, U. S. Nat. Mus., p. 105, pi. 15, figs. 



1, 3- 1915. 

 We secured a quantity of these shells on the beach at Monte 

 Cristi identical with the fossils from the blue clays. 



