204 THE CHICAGO ACADEMY OF SCIENCES. 
mal (anterior) end, where it narrows to receive the duct, which is 1.50 
mill. in length; the retractors of the penis and penis-sac are subequal, 
each being 1.00 mill. in length; they are very slender. 
Female organs: Receptaculum seminis very large, roundly pyri- 
form, the duct 2.00 mill. long; free portion of oviduct short, very thick; 
first accessory albuminiparous gland very large, ovate. 
A large specimen gave the following measurements :1 
Penis- Prostate Rec.sem. Penis Penis-sac 
Penis. sac. Vas. def. duct. duct. retractor. retractor. Shell. 
1.00 2.00 6.00 1.50 2.00 1.00 1.00 9.00 
RANGE: (Figure 15) South-central Colorado. So far as known 
this species is confined to the Canadian life zone and the Coloradoan 
and Upper Mississippian regions. It will probably be found in other 
parts of Colorado. 
RECORDS. 
CotorApo: West Cliff, Custer Co. (Cockerell); Hot Sulphur Springs, 
Grand Co. (G. S. Dodds; Henderson). 
GEOLOGICAL RANGE: Unknown. 
Ecotocy: Not recorded. 
REMARKS: Doddsi may be distinguished from truncatula by its 
generally less rounded whorls and aperture, and particularly by the 
formation of the inner lip, which is raised and overhangs the umbilical 
chink forming a broad, even expansion. In truncatula the inner lip 
rolls over into the umbilical chink nearly closing the perforation while 
in doddsi it is rolled upward leaving a distinct umbilical chink. 
This is the shell recorded by Prof. Cockerell as truncatula and 
by Mr. Henderson as humilis. It bears a strong resemblance, when 
young, to juvenile specimens of Galba cubensis aspirans, but its smaller 
size, more turreted spire and rounder aperture will easily distinguish 
it. There is some variation in the amount of compression of the inner 
lip. It may be distinguished from parva by its narrower body whorl 
and wider columellar expansion, which is not as erect as in parva. 
It is named in honor of Mr. G. S. Dodds, who collected the type 
specimens. 
Galba cubensis (Pfeiffer). Plate XX VII, figures 9-16. 
Limnea cubensis PFEIFFER, in Wiegm. Arch., I, p. 354, 1839.—Hyar. and 
Prr., Mal. Blatt., V, p. 135, 1858—PFeiFFer, Mal. Blatt., V, p. 154, 1858.— 
ARANGO, in Poey, Rep. Fisico.—Nat. Cuba, J, p. 137, 1865——Presas, in Poey, 
Rep. Fisico—Nat. Cuba, I, p. 264, 1865—Pory, Rep. Fisico—Nat. Cuba, II, 
p. 270, 1866—ARANGO, in Poey, Rep. Fisico—Nat. Cuba, II, p. 87, 1866.— 
Sowersy, Conch. Icon., XVIII, Limn. sp., 48, pl. 8, fig. 48, a, b, 1872 (figures 
not good).—STrEBEL, Natur. Ver., Hamburg, VI, p. 58, taf. 4, fig. 33, 1873.— 
Mar teEns, Jahrb. IV, p. 353, 1877.—Ciessin, Mal. Blatt., N. S., I, p. 27, 1879.— 
1Dissection No. 23939. 
