24 EUCALODIUM, ANISOSPIRA. 



69, pi. 6, f. 11; pi. 11, f. 6, 7, 13; pi. 12, f. 1 (anatomy). -v. 

 MART., Biologia, p. 262. Cylindrella edwardsiana PFR., 

 Monogr. viii, p. 437. 



Similar to E. boucardi, but with more widely spaced riblets, 

 with no spirals in the intervals. Strebel 's figure of a specimen 

 from near Misantla (fig. 12) is more slender than the type 

 from Cordova (figs. 8, 9). Strebel counted 77 riblets on the 

 penultimate whorl, which had a diameter of 12 mm. 



E. DESHAYESIANUM Crosse & Fischer. PL 2, figs. 13, 14. 



Shell slightly arcuate-subrimate, cylindric-turreted, rather 

 solid; dull and pale fleshy- whitish under a somewhat glossy, 

 pale yellow and almost completely deciduous cuticle. Spire 

 slightly tapering, broadly truncate ; suture deeply impressed. 

 7 to 8 whorls remaining, nearly flat, narrow, the first 3 or 4 

 slightly oblique and very delicately, following ones incon- 

 spicuously striatulate, the last whorl suddenly descending, 

 very shortly free, obtusely angular above, obsoletely subcarin- 

 ate below the middle. Aperture slightly oblique, irregularly 

 subangulate-rounded, white within; peristome continuous, 

 somewhat thickened, very narrowly reflexed throughout, 

 white, the columella hardly folded within. Length 32, diam. 

 91/2 mm. ; apert. with perist. 7 mm. long, 6% wide (C. & F.). 



Southern Mexico ( G-hiesbreght) . 



E. deshayesianum C. & F., J. de Conch, xx, p. 223, 1872; 

 Moll. Mex. p. 384, pi. 14, f. 9, 9a. v. MART., Biologia, p. 263. 

 Cylindrella deshayesiana PFR., Monogr. viii, p. 430. 



Distinguished by its small size, narrow whorls, incon- 

 spicuous striation and the facility with which the cuticle is 

 lost in adults. Only the two type specimens in the Museum 

 of Natural History at Paris are known. 



Genus ANISOSPIRA Strebel, 1880. 



Anisospira STREBEL, Beitrag zur Kenntniss der Fauna 

 mexikanischer Land- und Siisswasser-Conchylien,, Theil iv, p. 

 77 (for Cyl. liebmanni Pfr. and C. hyalina Pfr.). 



Shell imperforate, cylindric, pupiform or oblong-fusiform, 

 the earlier whorls self-amputated, the adult shell consisting of 

 3 to 5 whorls of about equal width, the next earlier 2 or 3 



