11 n PROCEEDINGS OF THE NATIONAL MUSEUM. 



EUCALODIUM DECOLLATUM GUATEMALENSIS, new subspecies. 



Plate III, fig. 9. 



Enrnlodinm decollntum Fischer and Cros&e (in part), Miss. Seient. Mexicjue, p. 

 o(i3, pi. XIV, figs. 3 and 3a; not Eucalodium decoUatnrn Nyst. 



Shell subcylindric, truncated, strong, of lig-ht reddish chocolate 

 color. Pluo- convex and granulose. Whorls ten and one-fonrth, 

 moderately rounded, increasing gently in size, marked by many 

 poorh^ defined, irregular, wavy, thread-like riblets, which are best 

 developed on the posterior whorls. Sutures well marked. Periphery 

 of the last whorl angulated. Base short, of lighter color than the 

 spire, well rounded, showing a strongl}^ impressed umbilical chink, 

 but no perforation. Aperture oblique, suboval; peristome continuous, 

 free, decidedly expanded, and somewhat reflected, white; columella 

 somewhat curved, obsoletel}^ truncated below. Aperture smoky white 

 within. Internal pillar with a strong, smooth, spiral fold. 



The type, Cat. No. 162307, U.S.N.M., was collected in Guatemala 

 by Godman and measures: Length, 60.9 mm. ; diameter of penultimate 

 whorl, 17.5 mm.; greatest diameter of aperture, from the posterior 

 angle to the angle at junction of outer lip and columella, 15 mm. 



This subspecies appears to agree well with the form cited by Fischer 

 and Crosse as E. decollatum Nyst. The true E. decollatum Nyst is a 

 much larger form. E. decollatiim guatemalensis lias the color of the 

 form known as ghieshreghti Pfeiffer. In the structure of the internal 

 axis it agrees with E. decollatum. In guatemalensis.^ however, the 

 lamella is a little less strongly developed. 



EUCALODIUM MEXICANUM MAJOR Fischer and Crosse. 



There is one specimen. Cat. No. 162500, U.S.N.M., in the collection 

 from Guatemala, donated by Dr. H. von Ihering. This has 10 whorls 

 remaining, which measure: Length, 65 mm.; diameter of penultimate 

 whorl, 16.8 mm. 



EUCALODIUM (OLIGOSTYLUS) BLANDIANUM Fischer and Crosse. 



There are five specimens of this form in the collection. Two, Cat. 

 No. 25029, U.S.N.M., labeled, Mexico. Two, Cat. No. 28787, U.S.N.M., 

 Eastern Mexico with a ? and one, Cat. No. 10526, U.S.N.M., Orizaba, 

 Mexico. The last was collected by G. Strebel, in 1866. 



EUCALODIUM (OLIGOSTYLUS) BLANDIANUM MINOR Fischer and 



Crosse. 



There are three specimens of this subspecies in the collection. Cat. 

 Nos. 185932 and 185933, U.S.N.M., all from Aculzintgo, Vera Cruz, 

 Mexico, presented b}' Prof. A. L. Herrera. One of these is a young 



