LOWER CALIFORMAN MOLLUSC A. 1 39 



var. lev is to this, but it is probable that fresher specimens 

 will show more of the sculpture of typical xantusi. 



Of the late collection some are living, and these are 

 strongly sculptured, as shown on pi. vi, fig. 29. (By an 

 oversight, the revolving strise are given as vertical in this 

 and in fig. 28; the lines of growth crossing them are not 

 shown strongly enough.) In dead specimens the epider- 

 mis and its granulations disappear from the surface of all 

 these small species. In some the vertical growth -lines 

 are the strongest, in others the revolving stria?. 



The color of living shells is not yellow or pale brown 

 and striped, as in var. levis, but uniform dark or chocolate 

 brown. A small bleached shell from about 4,000 feet 

 altitude, on El Taste Mountains, is very thin, translucent, 

 and filled with granitic gravel, which explains its depauper- 

 ate condition from absence of lime in the soil. Near 

 Cape St. Lucas seventeen were found, bleached and 

 smooth, at 2,000 feet elevation. The El Taste specimens 

 measure 0.80x0.50 inch to 0.95x0.45. The nuclear 

 whorls closely resemble those of the Colamna. 



Dr. Dall at first appears to have intended to make a 

 new species of var. Icvis, but without fresher specimens 

 than have yet been found this would not be safe. The 

 differences from the type pointed out by me in article 

 No. 2, p. 213, are that the epidermis has no cross-sculp- 

 ture, though entire, which is analogous to the difference 

 between the mountain form, montezmna, and its lowland 

 representative, vegettis. 



BuLiMULUs BAiLEYi Dall. (Correction.) 



B. xantusi zar. Stearns (in Catalogue?). 



" Cape St. Lucas, W. J. Fisher and G. Eisen; Ortiz, 

 Mex., V. Bailey; Guaymas, Mex., E. Palmer." 



This shell probably belongs to Mexico only; certainly 

 not to Cape St. Lucas. W. J. Fisher (now deceased) 



