500 PROCEEDINGS OF THE ACADEMY OF [Nov., 
| Sperm-| _. 
Species, Locality Penis| ~28- | Epi- |Flagel-) Va- ‘atheca| Diam. 
and Museum No. Co pilla. phallus) lum. | gina. | and of 
| duct, | Shell. 
S. granulatissima. 
RAMSEY; 18a; 257... node) ue payee t- 6 0.7 21 © (24-25 | 19 
Miller Cn., 94,336................ 6 A an PCE 0) 28 22 21 
Casr Oni; 90-4045..5) 30. t.0..: ea Te Lh he hs ecee 0 Ll Secon ony 18 
S. g. latior. | | 
Panter On. 94387 sc0cic| 16 | eee | 5 0 17 16 | 21-22 
Brown Cn.,94,356................| 6 4.5 6 0 iN eS ease 18.5 
Brown, w. fork, 94,359........). 5 Bio Ae a) He el ogee ee '-18 
Salvation, 94,395................ Coogi penta? Day Mea ae op tet Oe Tin ita eee ' 20 
Limestone Mt., 94,393........ ap | Seen eet ici be Oe 0 7 ie Bote 23 
S. danielsi. | | | 
Head of Bear, 94,3185 ...... 18.5 |} 138 10 0 (27.50 || 22 19 
Ditto 94 3172s cane | Scag ia (0 eka read OF ie raale Leite | 18.5 
Hi. fork Cave, 94,352, c0cc.0 120 1 8.5 bade... On: Ize ees 19 
Miller Pk., 94,337..............] 18.5 9 10 0 19 | 25 =| 18-19 
Sonorella granulatissima Pilsbry. Pl. XIX, figs. 7, 8, 9; pl. XXI, figs. 1-4. 
Proc. A. N. 8. Phila., 1905, p. 262, pl. 17, figs. 21-23; pl. 18, figs. 41-43, 
51-54. 
The typical form is found in Ramsey (figs. 7, 8), Carr and Miller 
(fig. 9) Canyons. Types were from Ramsey. The shell is distin- 
guished by its very dense beautiful granulation and the faintness or 
absence of spiral lines, though on some specimens they are present, 
but very weak. 
I have examined the genitalia in a number of individuals from each 
of the three canyons mentioned above. Figs. 1, 2, 3 represents one 
of the two cotypes. Fig. 4 is from an example from Miller Canyon. 
The chief feature is that the wpper part of the vagina has thick muscular 
walls, the outer layer consisting of glossy circular muscular fibers. 
Usually this part is more or less swollen and fusiform. The lower part 
of the vagina is thin-walled. This feature was conspicuous in every 
one of about 20 individuals of 12 lots of S. granulatissima and S. g. 
latior which were examined. ‘The penis is short, its length contained 
3 or 4 times in that of the vagina. It is abruptly truncate distally. 
The penis-papilla is quite short, 3.3 to 5 mm. long, cylindric, truncate 
at the end, and coarsely wrinkled. It is fleshy, perforated by a minute 
pore, which opens at the end. The rather short epiphallus has no 
flagellum in any example opened with the exception of one of the 
cotypes, in which there is a minute, vestigeal flagellum about 0.7 mm. 
° Measured from a fresh, drowned example. 
