18 



EUC ALODIUM. 



Length 38, diam. 11 mm.; aperture with peristome 8y 2 mm. 

 long, 8 wide (C. & F.). 



Oaxaca, central Mexico (Boucard). 



E. neglectum C. &. F., Journ. de Conch, xx, p. 302, 1872; 

 Moll. Mex. i, p. 373, pi. 14, f. 8, 8a. STREBEL, Beitr. iv, p. 67, 

 pi. 13, f. 15. v. MART., BioL, pp. 263. 



Distinct by its small aperture and narrow whorls. I have 

 not seen specimens. 



E. MARTENS: Strebel. PL 3, figs. 2-1-33. 



"Adult shell cylindric-turrete, with close-set very fine 

 striae, which are more oblique in the upper half, more vertical 

 in the lower half of the visible part of each whorl, glossy, 

 greenish-brown, white at the suture. Remaining whorls 61/4-8 ; 

 on the upper whorls the striae are comparatively stronger (so 

 much elevated that the sculpture might be termed costulate), 

 a little rough, and more equally oblique, being more vertical 

 just above the suture only. The upper whorls are also dis- 

 tinctly more convex than the lower ones. Aperture very little 

 produced beyond the suture, nearly circular, but rectilinear 

 above, where it is nearest the preceding whorl, and making 

 here a very obtuse angle with the strongly arcuated outer mar- 

 gin ; peristome continuous, as usual in this genus, very shortly 

 expanded, obtuse, white; columellar margin also well arcu- 

 ated, but behind it, in the depth of the aperture, is a distinct 

 white fold, rising up very steeply, without angle. Young 

 specimens (figs. 32, 33) are somewhat concavely turrete, and 

 resemble the figure 8c in Philippi 's Abbildungen ; they indicate 

 that the whole number of whorls is at least 14 or more, but 

 even in these the tip is truncated and the hole filled up by a 

 convex whitish wall. The dimensions of the adult specimens 

 (with continuous, expanded, and slightly produced peristome) 

 are some what different, as shown by the following measure- 

 ments : 



Largest (8 whorls) 35 mm. long., diam. 9%; aperture iy 2 

 long (high), 7 broad. 



Smallest (7% whorls) 24% mm. long., diam. 8; aperture 

 6 long, 6 broad. 



