118 OXYSTTLA, MEXICO, ETC. 



form ; columella scarcely twisted, nearly vertically descending. Alt. 

 62, diam. 28.5, alt. of aperture 28, width 14 mill. (Rolls.} 



Colima, Western Mexico. 



Orthalicus elegans ROLLE, Nachr. Bl. D. Malak. Ges. 1895, p. 131, 

 no. 15. 



''Closely allied to 0. princeps, but evidently separable specific- 

 ally." It has not been figured. 



0. colimensis (Rolle). 



Differs from 0. princeps in the more solid shell and much more 

 twisted columella. Alt. 58, diam. 30, alt. of aperture 28, diam. 15 

 mill. A form standing between 0. princeps and 0. ferussaci, of 

 which unfortunately only specimens collected dead are before me ; it 

 appears to me specifically different. (Rolle.) 



Colima. 



Orth. (colimensis n. sp.f) ROLLE, t. c. p. 131, no. 18. 



0. LIVENS (Shuttleworth). PI. 23, fig. 15. 



Shell elongate-acuminate-ovate, thin, striatulate, marked with 

 close and very minute undulating spiral lines ; dull buff, ornamented 

 with brown, somewhat waved streaks, subinterrupted or obsolete 

 below the periphery of the last whorl, which is narrowly and incon- 

 spicuously two-banded. Spire conic, livid above, apex intense purple- 

 black. Whorls 6, a little convex, the last about as long as the spire; 

 columella slender, thread-like, rather straightened. Aperture ob- 

 lique, truncate-oval, white inside, and somewhat streaked ; peristome 

 unexpanded, bordered with intense chestnut-brown, the margins con- 

 nected by a chestnut-brown callus. Alt. 48, diam. 22, longest axis 

 of aperture 25 mill. (Shutt.} 



Mexico, probably near Vera Cruz (Sandoz). 



Orthalicus livens SHUTT., Notitiae Malacologies i, p. 64, pi. 3, f. 8 

 (185G) PFR., Monogr. Hel. Viv. iv, p. 589. ? FISCHER & CROSSE, 



Miss. Scient. Mex., Moll, i, p. 453, pi. 18, f. 6, 6a ?0. livens BECK, 



Index, p. 59 (nude name). 



The typical 0. livens is still known solely by Shuttleworth's de- 

 scription and figure. He remarks that the apex varies from intense 

 to pale purple-black, and the streaks are sometimes wider and darker 

 colored. It is allied to 0. princeps, but differs in the more slender 

 form, the last whorl not ventricose, base narrower, and the color, 

 pattern and thinness of the shell. 



