OXYSTYLA, MEXICO, ETC. 125 



O. MACLTTRJE (v. Martens). PL 21, figs. 40, 41, 42. 



Shell ovate-conic, solid, delicately spirally striatulate, plicatulate, 

 at the sutures; yellowish, painted with wide, nearly straight black- 

 brown streaks. Whorls 6J, a little convex, the upper three yellow, 

 not streaked, apex generally brown; last whorl regularly ovate. 

 Aperture a little less than half the length ; peristome rather widely 

 black-brown, a little thickened ; columella white, parietal callus in- 

 tense chestnut-brown. Alt. 52, diam. 29, aperture 27 mill. 



a. Last whorl equally streaked, apex pale or minutely brown (fig. 

 40). 



b. Last whorl with the streaks confluent, anteriorly subequally 

 tawny, varices repeated, two spiral bands continued from the fourth 

 to the first part of the last whorl ; apex broadly brown-Jblack ; colu- 

 mella narrowly whitish (fig. 41). 



c. Albinistic ; streaks and callus very pale fulvous, apex and peri- 

 stome white (fig. 42). 



2f. W. Nicaragua : Cacao, in the Bay of Fonseca, on trees of the 

 yellow-wood, Madura auraritiaca, family Morece (Capt. Joh. Schaf- 

 fer). 



Ortalichus maclurae v. MARTENS, Biol. Centr. Amer., Moll., pp. 

 181, 188, pi. 11, f. 1-3 (August, 1893). 



" Owing to the kindness of Fr. Bocherding, Vegesack, Bremen, I 

 have before me twenty-two specimens collected at the same locality, 

 which cannot be separated specifically one from the other. The 

 ground-color is very pale yellow, in worn specimens white ; the 

 streaks are broad, dark blackish-brown, the interstices between them 

 mostly about equal in width to the streaks themselves ; in the upper 

 whorls, however, the interstices are often even broader, and in this 

 respect young, somewhat bleached specimens very much resemble 

 0. boucardi; in some adult specimens, on the contrary, the streaks 

 are narrower and more numerous in the last whorl, these examples 

 approaching 0. zoniferus. In most specimens the streaks are not 

 forked at their upper end ; in some, however, a few streaks are forked, 

 but in none is the forking so constant and conspicuous as it is in 0. 

 prmceps. In a few examples, one, two, or three narrow dark spiral 

 bands are present on the fourth and fifth whorls, the lowest of them 

 in the suture. In some specimens the apex is of the same pale yellow 

 as the three upper whorls ; in others, it is to a very small extent dark 

 brown ; in others, again, nearly the whole first whorl is dark. The 



