142 Bulletin 39 314 



and consists of narrow, yellow V-shaped lines, the acute base of 

 which are directed backwards or away from the aperture and lie 

 along the center of the whorls. Similiar markings may be seen 

 on Veatchi and Guppy* has described the same markings for 

 pugiloides from Jamaica. Length 63, diam. 42 mm. 

 Gatun Stage: Gatun, C. Z. 



Water Cay, Panama,. 



Headwaters of Middle Creek, C. R. 



fstromlJUS pugiioides Guppy Plate 13, figures I, 2, 3 



Strombus pugilis Guppy, i865, Quart. Geol. Soc. London, vol. 22, p. 



287. 



Strombus pugilis Gabb, 1873, Trans. Amer. Phil. Soc, vol. 15, p. 



233- 

 Strojjibus pugiloides Guppj', 1874, Geol. Mag., new series, vol. i, p. 



433- 

 Strombus pugilis Gabb, 1881, Journ. Acad. Nat. Sci. Phila., vol. 8, p. 



340. 

 Strombus pugilis Bose. 1906, Boll, de Inst. Geol. de Mexico, numero 



22, p. 35, Pl- 4, figs. 1-6. 

 Strombus pugiloides Maury, 1917, Bull. Amer. Pal., vol. 5, p. 284, pl. 



20, fig. 6. 



A smaller species than the gatunensis, from which it also 

 diilers by its longer spire and more strongl}^ sculptured shell. 

 The coiling follows below the shoulder of the whorls, which is 

 either simply rounded or bears several large, spine-like tubercles 

 as in the recent ptigilis. Resting stages develop large, hump- 

 like areas irregularly distributed on the spire-whorls. Varieties 

 occur which may be spirall)' sculptured over the whole shell or 

 the last whorl ma}^ be largeh^ smooth. The original coloration 

 is still preserved on some shells and consist as in gatiinensis of 

 narrow, yellow, V-shaped lines, the apex of which lie about the 

 middle of the shell and directed backwards. It is very distinct 

 from the recent West Indian ^j^^zYw, which does not appear to de- 

 scend below the Pliocene. 



* Proc. Sci. Assoc. Trinidad, 1873, vol. 2, p. 82, (reprint: Bull. Amer 

 Pal., vol. 8, p. 214). 



