HOLOSPIRA. 85 



fore me confirms the wide variation in shape recorded by 

 Strebel. Figs. 52, 53 are copied from Pfeiffer's original 

 illustration; figs. 54, 55 are those of Strebel, double natural 

 size; while figs. 56-58 are from specimens in the museum of 

 the Academy. I have found the internal structure the same 

 in the shortest and longest specimens. Named for George 

 W. Tryon, Jr. 



Var. gealei (H. Adams). PL 15, fig. 3. 



Shell minutely perforate, cylindrical, solid, obliquely stri- 

 ate, whitish; spire oblong, the apex conic, a little acute, 

 yellow. Whorls 12-13, rather flattened, subangular above, 

 the last a little ascending, shortly free in front. Aperture 

 angulate-circular ; peristome continuous, expanded and a 

 little reflexed throughout. Length 15, diam. 5% mm. 

 (H. Ad.). 



Putla, State of Oaxaca, Mexico (H. Ad.). 



Cylindrella (Holospira) gealei H. AD., P. Z. S., 1872, p. 13, 

 pi. 3, f. 19. PFB., Monogr., viii, p. 447. 



Published data afford no differences from H. tryoni of the 

 neighboring State of Puebla, except that gealei is slightly 

 larger, and has fewer whorls than the largest tryoni. The 

 internal structure is unknown. Under the circumstances it 

 seems best to follow von Martens' precedent and place 

 H. gealei as a variety under H. tryoni. 



10. H. VERACRUZIANA Dall. 



"Shell closely resembling the enlarged figure of H. micro- 

 stoma Pfeiffer, but with a short apical cone and larger aper- 

 ture. According to the description of H. microstoma, the 

 present species differs by having 17 whorls in a total length 

 of 17.5 mm. against 18 whorls in a length of 15.5 mm. for 

 H. microstoma, both having a maximum diameter of 5 mm. 

 The last whorl in the present species is rounded below, that 

 of H. microstoma angulated; in H. veracruziana the aper- 

 ture is expanded, with the outer posterior part hardly angu- 

 lar where the outer lip meets the parietal portion; the 

 diameter of the aperture is 3.5 mm. (against 2.6 in H. micro- 



