i6 



Erzvin H. Barbour, 



of which Fig. 2y is a portion was found some seven or eight 

 feet above the ground, in the nearly vertical walls of a small 

 ' blow-out ' (Fig. 4, E). It was so completely weathered out 

 that it fell with violence on my head with the first blow of my 

 workman's pick. But a few feet to the right of this specimen 

 could be seen others, the most noticeable being an immense 

 corkscrew log fully eighteen inches in diameter. 



Figs, ii and 12. — Two views of an excellent example of Daimonelix circumaxilis. 

 Sketched in the field. 



A beautifully regular and symmetrical specimen belonging 

 to this genus was secured on the last expedition by Mr. 

 Thomas H. Marsland. The screw enlarges noticeably from 

 the bottom to the top, and with a nicety not to be portrayed 

 in a drawing made in the field. (See Figs. 11 and 12.) It 

 seems deserving of passing notice that the basal coil con- 

 tinues for nearly two turns below the stem, a peculiarity 



316 



