EUC ALODIUM. 11 



E. sumichrasti seems to be intermediate between E. blan- 

 dianum and E. decollatum Nyst, of which E. ghiesbreghti is 

 very likely a synonym. It is distinguished from E. Uan- 

 dianum by the less tapering spire, flatter whorls, less visible 

 and weaker malleation of the shell, which at the same time is 

 more solid; the costulae are finer, more numerous and fili- 

 form ; the aperture is angularly rounded and milk white, the 

 peristome is pure white and not whitish, and finally, the col- 

 umellar margin is wholly without a fold. It differs from 

 E. decollatum by the olive-green cuticle, distinct malleation 

 of the last two whorls, finer costulation and less irregular aper- 

 ture (C. & F.). 



E. WALPOLEANUM Crosse & Fischer. PL 4, figs. 1, 2, 3, .4; 

 pi. 8, fig. 22. 



Shell imperforate, arcuately rimate, cylindric-tapering, 

 moderately solid, brownish-yellow with indistinct darker 

 streaks or reddish-brown. Surface somewhat glossy, sculp- 

 tured with regular thread-like striae separated by much wider 

 intervals, which are closely and finely wrinkle-striate spirally, 

 the spirals sometimes passing over the striae also. The spire 

 tapers above, but several later whorls are of about equal dia- 

 meter; apex truncate. Whorls remaining about 10 (9 to 12), 

 convex, the last having the base defined by a small carina"; 

 shortly free in front, aperture somewhat oblique, ovate, angu- 

 lar above, white or reddish inside. Peristome white, continu- 

 ous, narrowly reflexed throughout. Oolumella oblique, a little 

 excavated below. Internal column slender, a little sinuous. 

 Length 75, diam. 18 mm. 



Southeastern Mexico: Woods of Palenque, Chiapas (type 

 locality, Morelet) ; Chiapas (Boucard) . Northern Guate- 

 mala: Mountains of Vera Paz (Bocqurt) ; Cohan (Salvin) ; 

 woods between Tactic and TamaJiu (Sarg.). 



Eucalodium walpoleanum C. & F., Journ. de Conchyl. 1872, 

 p. 75; Moll. Mex. i, p. 377, pi. 14, f. 6, 6a. v. Mart, P. Z. S. 

 1875, p. 648 ; Biol. Centr. Amer., Moll., p. 259. STREBEL 

 Beitrag, iv, p. 67, pi. 7, f . 1 a, b ; pi. 14, f . l2.Cylindrella 

 walpolei Sows., Conch. Icon, xx, pi. 6, f. 51. Cylindrella 



