EUCALODIUM. 15 



E. DECURTATUM (H. Adams). PL 6, figs. 27, 28, 29; pi. 1, 

 fig. 5 ; pi. 8, figs. 15, 16. 



Shell arcuate-rimate, subcylindric, truncate, rather thin, 

 lightly plicate obliquely, pale rufous-tawny. Suture im- 

 pressed. Whorls remaining 6 to 7, rather flattened, a little 

 angulate above, the last shortly free in front, not descending, 

 very lightly thread-carinate above and at the base. Aperture 

 a little oblique, subcircular; peristome narrowly expanded 

 and a little reflexed, whitish. Length 28 to 29, diam. 10 mm. ; 

 diam. of apert. 6 mm. (H. Ad.). 



Putla, State of Oaxaca, Mexico (Boucard). 



Cylindrella (Urocoptis) decurtata H. AD., P. Z. S. 1872, p. 

 13, pi. 3, f. 20. PFR., Monogr. viii, p. 39.Eucalodium de- 

 curtatum H. Ad., CROSSE & FISCHER, Moll. Mex., p. 385, pi. 

 15, f. 5, 5a.v. MART., Biol. Centr.-Amer., Moll., p. 261. 



The original description is given above, and the original 

 figure copied, pi. 6, fig. 27. The single specimen before me 

 (pi. 1, fig. 5, and pi. 8, figs. 15, 16) is flesh-pink with some 

 whitish over-color in streaks and diffused. "Whorls 6%, the 

 first one sculptured with delicate, regular, wide-spaced riblets. 

 These become lower and less distinct on the subsequent whorls, 

 and much closer, crowded, on the last. The internal pillar is 

 slender and nearly straight, showing only a very slight twist, 

 less than in E. grande or E. splendidum. It measures, length 

 291/2, diam. 9% mm., being much smaller than either of the 

 species mentioned. 



E. HIPPOCASTANEUM Dall.^ PL 1, figs. 6, 7, 8, 9. 



Shell rimate, cylindric, somewhat tapering above, rather 

 thin; dark chestnut brown, becoming bright brownish-yellow 

 behind the outer lip. Surface somewhat glossy, regularly rib- 

 striate, the riblets oblique, arcuate, narrower than their inter- 

 vals, somewhat stronger and more spaced on the earlier whorls, 

 becoming closely crowded on the last whorl ; the intervals are 

 puckered by fine vertical wrinkles below the suture, obsolete 

 in places; and the convexity of the last two whorls is irre- 

 gularly malleated, interrupting the riblets more or less. Su- 

 ture impressed, marked by a fine yellow line. Whorls 6%, 



