216 PROCEEDINGS OF THE ACADEMY OF [Mch., 
intervals or a little narrower, except on the last whorl, where the sculp- 
ture is a little coarser and irregular. The whorls are all convex, the 
last 4 or 5 forming the cylindric portion, the preceding whorls forming 
the terminal cone, which is about one-third the total length of the shell. 
The last whorl is pinched or compressed laterally, but the very short 
straight “neck” is full again, and carries the aperture very shortly 
free. The aperture is rounded, but a little irregular, the upper margin 
being somewhat straightened. The thin peristome is narrowly ex- 
panded. 
The internal pillar is rather large and of equal calibre in the cylindric 
portion of the shell. At the end of the penultimate and beginning of 
the last whorl there is a short strong and blunt lamella on the pillar 
below the middle, a low, short lamella on the parietal wall and another 
on the basal wall. There is no palatal lamella. 
Length 7.5 to 9, diam. 3 mm. 
Manilla mine, Huachuca Mountains. 
This is a very short, thick-set species, unlike all others known in its 
internal armature. The even ribbing and short terminal cone are also 
characteristic. It is closely related to H. arizonensis Stearns, from 
Dos Cabezas, a place west of the Chiricahua range and not far from one 
of the localities of H. ferrissi; but besides the slight difference in inter- 
nal structure, H. arizonensis differs in being slightly larger with more 
whorls, and the riblets are subobsolete on the cylindric portion of the 
shell, while in H. ferrisst they are even stronger there than on the ter- 
minal cone. | 
This species occurred also at Fort Bowie, Arizona, where the shells 
average a trifle larger: 
Length 7.5, diam. 3 mm., whorls 93. 
Length 10, diam. 3 mm., whorls 114. 
This'species seems to partially connect typical Holospira with the 
sections Eudistemma and Distomospira. The lamelle are far shorter 
and weaker than in the typical section, in fact, might easily be over- 
looked. 
Holospira arizonensis Stearns. 
This shell is cylindric with a short, ribbed, terminal cone. The median 
whorls are smoother, only obscurely sculptured, and the last whorl is 
ribbed. Whorls 12 or 13. 
The internal axis is moderately large, and there is a short lamella on 
the axis and one on the parietal wall or roof in the penultimate whorl. 
Length:12.5 to 13, diam. 4 mm. 
Southeast Arizona, at Dos Cabezas, Cochise county. 
