265 Dominican Fossils — Maury ioi 



pi. 10, fig. 4, 1849. 

 Typhis aiatus Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 203, 1873. 

 Typhis aiatus Guppy, Idem, vol. 32, p. 522, 1876. 



This rare shell is characterized by the very thin, greatly ex- 

 panded, wing-like varix. 



The type was collected by Heneken in Santo Domingo and 

 Guppy identified the shell from Bowden. 



Typhis cercadims, n. sp. 

 Plate 16, Figure 12 

 Shell small, each whorl with four varices and four tubes, the 

 tubes arising slightly behind the varices; on the last whorl are 

 faint indications of about six raised spiral lines; the whorls are 

 shouldered and the varices end at the shoulder; canal wide, cov- 

 ered, former position of canal indicated by a tubular process be- 

 side the canal. Length of shell 7, width 4.25 mm. 

 Locality. — Bluff 1, Cercado de Mao. (Very rare) 



Genus Murex Linne 



Murex messorius Sowerby 



Plate 16, Figures 1, 2 



M. messorius Sowerby, P. Z. S., p. 137, 1840. 



M. messorius Reeve, Conch, Icon. Murex fig. 90, 1845. 



M. recurvirostris Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 201, 



1873. Not M. recurvirostris Broderip. 

 M. messorius Dall. Trans. Wagner, Inst. Sci., vol. 3, pt. 1, p. 139, 



1890. 

 M. messorius, Dall and Simpson, U. S. Fish Comm. Bull, for 1900, 



vol. 1, p. 407, 1 901. 

 M. messorius Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 353, 



1911. 

 This ancient static species is still living on the Monte Cristi 

 beach and has undergone no change since the deposition of the 

 blue clays. It is also found at Gatun. 



Localities. — (Exp'd'16) — Bluff 3, Cercado de Mao (very 

 abundant); Zone D, Rio Gurabo at L,os Quemados. 



Murex domingensis Sowerby 

 Plate 16, Figures 3, 4, 5, 6 

 Murex Domingensis Sowerby, Quart. Jour. Geol. Soc, vol. 6, p. 49, 



