1910.] NATURAL SCIENCES OF PHILADELPHIA. 113 
variable, as in all the related species. Two of this lot are figured, 
pl. IX, figs. 1, 2, 4,5. In one or two shells there is the minute vestige 
of a parietal tooth (figs. 4, 5). The soft parts were partially spoiled 
when studied, but I have figured the terminal ducts of the genitalia, 
pl. X, fig. 3. The spermatheca was broken. Other organs agree with 
the type figured in 1905. 
The genitalia of two specimens are figured, pl. X, figs. 2, 5. The 
penis and vagina conform in shape to the usual Chiricahuan type. 
The retractor muscle of the penis is well-developed, but short, about 
2 mm. long. The epiphallus is very long. Measurements of the 
organs may be found on p. 97. The penis and epiphallus are decidedly 
longer in three specimens of this lot dissected than in the type or 
topotype of esuritor. The spermatheca of the types of esuritor is 
unusually swollen distally, as correctly represented in the figure 
published in 1905. 
Additional specimens (pl. IX, figs. 6, 7, 8) from the east side of 
Barfoot Park, Station 1a, were taken by Mr. Ferriss in 1907. The penul- 
timate and two preceding whorls have the fine strie interrupted 
irregularly, in places forming minute granules, and there is besides 
some indistinct appearance of punctation on the spire. There are 
very fine spiral lines on the base. There is a wide prominence, hardly 
to be called a tooth, within the outer lip in most examples, but in some 
this is very low or wanting, and in none quite so prominent as in the 
type of A. metamorphosa. Edentulous specimens resemble A. chirica- 
huana closely, but they differ from that species by the slightly more 
depressed shape, by having a rather deep, narrow gutter behind the 
lip (almost wanting in A. chiricahwana), by the smaller aperture 
in shells of the same diameter, and by having the umbilicus wider 
within, though not at its mouth. Three adults, No. 94,432, measure: 
Re Loko casiccsied anche Anabarczeaacees. 50: 8 ie: 6.7 mm 
Ding SAR co CSE eee 17 16.3 15 ct 
00 5) el CR 64 53 6 
In 1906 we dug out asmall series of dead shells (No. 97,930) from under 
the snow and rocks in the head of Pine Canyon,” perhaps fifteen minutes 
walk down from Barfoot Park. The callous “tooth” within the outer 
lip is either weak or wanting in these examples, and four out of ten 
adults taken show the weak trace of a parietal tooth. The most 
*3'This canyon, which runs westward from Barfoot Park, is sometimes called 
Riggs’ Canyon, or Saw-mill Canyon. At its head a saw-mill stood, but it was 
removed in the spring of 1907. 
