EUCALODIUM. 21 



Mexico (Gruner coll.) ; Cordova (Salle, Hoge) ; Coatepec 

 (Hoge) ; Jalapa and Cuesta de Misantla (M. Trujillo). 



Cylindrella speciosa DKR. in Phil., Abbild. u. Beschreib. 

 i, p. 86, Cylindrella pi. 1, f. 19 (1844) . Eucalodium boucardi 

 var. minor, CROSSE & FISCHER, Moll. Mex. i, p. 381, pi. 15, 

 f. 6, 6. STREBEL, Beitr. iv, p. 71, pi. 6. f. 6.E. speciosum 

 v. MART., Biologia, Moll., p. 262. 



Distinguished by its fine but strongly developed, thread- 

 like riblets, silk-like luster, descending last whorl and small 

 size. The internal pillar is very slender and straight. The 

 type had evidently lost its cuticle and color, like a specimen 

 before me. The riblets are less crowded than in var. boucardi, 

 and the shell is more slender. 



Var. BOUCARDI (' Salle ' Pfr.). PI. 2, figs. 6, 7; pi. 8, fig. 18. 



Shell arcuate-rimate, clavate-cylindric, truncate, rather 

 thin, provided with close, somewhat arcuate hair-like riblets, 

 transversely striated in the intervals; corneous-tawny. Su- 

 ture light, slightly marginate. Whorls remaining 9 to 11, 

 slightly convex, the last free in front, obliquely descending, 

 angular above, obtusely carinate below the middle. Aperture 

 angularly oblong, with a strong, twisted columellar fold; 

 peristome white, narrowly expanded. Length 52-56, diam. 13 

 mm.; aperture 11 mm. long, 8i/o wide (Pfr.}. 



Cordova, (Salle, type locality), and Orizaba (Botteri), 

 State of Vera Cruz. 



Cylindrella boucardi Salle, PFR., P. Z. S. 1856, p. 321; 

 Malak. Bl. 1856, p. 216; Conchyl. Cab. p. 35, pi. 8, f. 1, 2; 

 Monogr. iv, p. 695; vi, 365; viii, 429. Eucalodium boucardi 

 CROSSE & FISCHER, Moll. Mex. i, p. 381. STREBEL, Beitr. iv, p. 

 70, pi. 5, f. 15. v. MART., Biologia, Mollusca, p. 262. 



This form is larger than speciosa or the following varieties, 

 but I agree with Prof, von Martens that it is not worthy of 

 specific rank. The shape varies a good deal, two specimens 

 measuring 



Length 54, greatest diam. 12.3, diam. at apex 7 mm. 9*4 

 whorls. 



Length 53, greatest diam. 13.5, diam. at apex 8.5 mm. 

 whorls. 



