537 Dominican Fossils — Maury 63 



Cancellaria Barretti Guppy, Quart. Jour. Geol. Soc. London, vol. 32, 

 p. 520, 1876. 



This is the praecursor of C. reticulata Dinne, living in the 

 Antilles. Its fossil analogues are C. Conradiana Dall, Florida 

 Pliocene, and C. Dariena Toula, Gatun. Guppy' s type was a 

 Bowden shell. 



Localities. — (Exp'd ' 16) Bluffs 1, 2 and 3, Cercado de Mao. 



Cancellaria Rowelli Dall 



Plate 10, Figure 2 



Cancellaria Rowelli Dall, Proc. U. S. Nat. Mus., vol. 19, no. 1110, p. 

 307, pi. 29, fig. 1, 1896. 



The type measured 25X13 mm. Its nearest ally is C. nr- 

 ceolata Hinds, living on the west coast of Central America. 

 Collected by Rowell at Potrero, Rio Amina. 



Cancellaria epislomifera Guppy 

 Plate 10, Figures 3, 4, 5 



Cancellaria Moorei Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 236, 



1873. Not C. Moorei Guppy 1866. 

 Cancellaria epistomifera Guppy, Quart. Jour. Geol. Soc. London, vol. 



32, p. 520, pi. 28, fig. 9, 1876. 

 Cf. Cancellaria dariena var. Toula, Jahrb. der K-K. Geol. Reichsans- 



talt, Wien, vol. 58, p. 704, pi. 28, fig. 1, 1908. 

 Cancellaria epistomifera Cossmann, Journ. de Conchy liologie, vol. 61, 



PP- 53- 54, pi. 4, %s. 5, 6, 1913. 



Our series is divisible into two sets: (1) Protoconch small, 

 first two whorls smooth, the third developing riblets slightly be- 

 fore or simultaneously with the spiral threads; post-nuclear spi- 

 rals strap-like; (2) Protoconch large, first two whorls smooth, 

 the third developing five to seven spiral threads, preceding the 

 riblets by a third of a volution; post-nuclear spirals sharp-edged. 

 Dr. Dall compared (1) with the type and pronounced it the true 

 epistomifera and suggested (2) might be a variety. Toula' s C. 

 dariena var. is very like C. epistomifera, but does not show the 

 characteristic spout of the outer lip. M. Cossmann reports a 



