8 



EUCALODIUM. 



Var. MAJOR C. & F. Larger, more violaceous; whorls re- 

 maining 10%; length 67, diam. 16 mm. Alta Vera Paz 

 (Bocourt) ; woods between Tactic and Tamahu (Sarg), 

 Guatemala. 



I have not seen this large southeastern race, which ap- 

 proaches E. ghiesbreghti in size. 



Var. MINOR Pfr. PL 7, figs. 11, 12, 13, 14. 



Shell much smaller, thinner, with the same sculpture and 

 color. 



Length 32%, diam. 10 mm.; whorls 8. (Pfeiffer's type). 



Length 33%, diam. 11 mm. ; whorls 7%. Figs. 11, 12) . 



Length 36%, diam. 9% mm. ; whorls 8%. 



The basal angulation is represented too strong in fig. 11. 

 The localities Alta Vera Paz (Bocourt) and woods between 

 Tactic and Tamahu (Sarg), both in Guatemala, and Juquila, 

 state of Oaxaca, Mexico, are given for this race. The speci- 

 mens before me are labeled merely Mexico. 



Subgenus OLIGOSTYLUS Pilsbry, Dall, 1895. 

 Oligostylus Pilsbry, in DALL, Nautilus ix, p. 51 (Sept. 1895), 



type E. blandianum. 



The internal pillar is slender and either straight or slightly 

 sigmoid within each whorl, never flattened into a spiral 

 lamella. Externally the shell does not differ in any conspicu- 

 ous respect from typical Eucalodium. The typical species, 

 E. blandianum, has a narrower radula (teeth 36.1.36) than 

 typical Eucalodium. 



This group includes most of the species of the genus. They 

 are in many cases closely related and difficult to distinguish. 



1. Large solid species, length 70 mm. or more, 



group of E. blandianum. 



2. Smaller species, length less than 60 mm., in which the last 

 whorl is but shortly built out in front, the rib-sculpture is 

 moderately coarse, and the internal axis is slightly sigmoid, 



group of E. splendidum. 



3. Thin, somewhat fusiform, densely rib-striate species, in 

 which the last whorl deviates and descends considerably in 

 front, and the aperture is very oblique; axis is straight 

 and slender, group of E. speciosum. 



