82 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXV 
A week in October, 1917, camp was pitched upon the same spot 
in Sycamore canyon in the Baboquivaris occupied by us in 1910. 
A. W. Roberts, of much assistance to us at that time, feeling the 
need of venison, was the host, and thus it was designed as a hunting 
party; but the collections were good. The Forest Reserve has been 
vacated by the U. 8. Government, and Frank Cole, the ranger, 
withdrawn. Much of the timber seen in 1910 has disappeared, 
and the streams have less water, yet the snails seemed more 
plentiful than before. Perhaps the rodents have departed; very 
few were seen. On no other range were so many snails found alive. 
Fifteen to sixty was the rule at every station. 
A form of S. baboquivariensis was taken at Station 117 (1918), 
in the rincon of Chief Pablo, in the cliffs of the creek near a cow 
camp, formerly the Sycamore Forest Ranger station (marked on 
map, fig. 6, p. 77). The shells vary in size from 16.4 to 20.3 mm. 
diam. The umbilicus is generally slightly wider than in typical 
S. baboquivariensis, but there is no constant difference. 
The genitalia (Plate VII, figs. 12, 13) differ chiefly by the absence of 
an enlargement of the end of the penis-papilla, which is rather 
thick as in baboquivariensis, but slightly longer. The papilla is 
shaped as in S. b. depressa but is much larger, especially thicker. 
The epiphallus is very slender and long, but was not gotten out 
entire, the specimens being very hard. Vagina is short. Three 
specimens of no. 118085 were dissected. The organs of two measure: 
PC SA een co’. cts taal Ree ee ieee ee ee 6.2 mm. 6 mm. 
PTET St POS fore leo cca herenc ee et eme e elee am  ae 43 7 
MELERLESD pu’ or or ode wae Ae ceeteet eae Bans CRO IEE naa tae 2 ake Bos 
On account of the difference in the papilla, this should be segre- 
gated as a race if the character proves constant. 
Sonorella baboquivariensis depressa P. & F. Plate II, fig. 11; pl. VII, figs. 5-7, 9, 10. 
In October, 1917, one of us (J. H. F.) visited the last canyon 
northward of those shown in our sketch map of 1915, p. 413, known 
as ‘“‘Sycamore” or ‘“‘Brown’s” canyon The stations of this visit 
are plotted in text fig. 8, representing a northward extension of the 
former map. 
The shells vary from the typical baboquivariensis form (Station 2) 
to smaller forms with the umbilicus somewhat less covered, and 
either narrow, as in baboquivariensis, or much wider, as in the 
form called S. b. depressa. Two from Station 5 measure: 
Plate II, fig. 9. Height 11.8, diam. 19.2 mm., umbilicus 2.5 mm. 
Plate II, fig. 10. Height 10, diam. 16.2 mm., umbilicus 1.8 mm. 
