io4 Bulletin 29 258 



open, somewhat reflexed; outer lip edged by the final fimbriated 

 varix and bearing within five well-marked denticles. Length 16, 

 width 7 mm. 



This species is named from its resemblance to M. pauxillus 

 A. Adams, living on the northwest coast of Mexico at Mazatlan. 

 The fossil appears to be the ancestor of this shell. 



Locality. — (Exp'd '16.) ZoneD, Rio Gurabo at Los Que- 

 mados. 



Genus Aspella Moerch 

 Aspella scalarioides Blainville 

 Plate 17, Figure 11 

 Murex scalarioides Blainville, Faune Francaise, p. 131, pi. 5, figs. 5, 6 , 



1826. 

 Aspella ? scalarioides Dall, Bull. Mus. Comp. Zool. Harv. Coll., vol. 



18, p. 208, 1889. 

 Aspella scalarioides Dall and Simpson, Bull. U.S. Fish Comm., vol- 

 20, pt. 1, p. 410. 1900. 



Dr. Dall very kindly examined our specimen and decided 

 it was identical with the recent species living in the Antilles and 

 the Mediterranean. 



Locality. — (Exp'd '16) ZoneD, Gurabo at Los Ouemados. 

 Genus Cymia Moerch 

 Cymia Henekeni, n. sp. 

 Plate 17, Figure 1 

 Cuma tectum Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 214, 1873. Not 



of Kiener, Chemnitz, or Reeve. 

 Cuma tectum Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 524, 



1876. 

 Cymia Woodii Dall (in part) Trans. Wagner Inst. Sci., vol. 3, pt, 1, 



p. 155, 1890. 

 Purpura {Cuma) Woodii Guppy, Trans, Canadian Inst., p. 390, 1909- 

 Cymia Woodii Maury, Jour. Acad. Nat. Sci. Phila., 2d ser.. vol. 15, p. 

 82, pi. 11, figs. 9, 10, 1912. 



We have a number of specimens from Santo Domingo sent 

 by Professor Gabb as Cuma tectum. A comparison of these 

 with shells of the recent C. tectum collected hy Dr. Newcomb on 

 the coast of Ecuador, leads one to the conclusion that the fossil 

 and recent shells are not identical. The fossils resemble those we 



