214 THE CHICAGO ACADEMY OF SCIENCES. 
Dr. Dall (Alaska Mollusks, p. 78) suggests the identity of ade- 
line and bulimoidcs. An examination of the types of both species 
shows that Dall was right in thus associating the two forms. Tryon’s 
types show a wide range of variation, principally in the form of the 
body whorl, which may be regularly ovate or somewhat widely ex- 
panded (compare the figures on plate XXVII). The figures of both 
forms have been very poor, and the déscriptions have been totally 
inadequate. Tryon’s figure in continuation of Haldeman’s monograph 
is of an extremely wide specimen, scarcely to be considered as typical. 
Many specimens vary toward techella, the inner lip being wider and 
the umbilical chink more widely open. Adeline (~bulimoides) has 
frequently been confounded with gabbi, but that species 1s almost im- 
perforate, has a columellar plait and belongs to a different group of 
Lymneeas, 
Galba bulimoides techella (Haldeman). Plate XX VII, figures 
30-35 ; plate XX VIII, figures 1-3, 8. 
Limnea techella HALDEMAN, Amer. Journ. Conch., III, p. 194, pl. 6, fig. 4, 
1867.—Tryon, Con. Hald. Mon., p. 112 (86), pl. 18, fig. 9, 1872.—Pitssry, Proc. 
Pink “Acad, 1891, p. 320. ; 
Lymnea techeila? Ferriss, Nautilus, XX, p. 17, 1906—BAxkeEr, Nautilus, 
XXIII, p. 94— Hanna, l. c., p. 96, 1909. 
Lymnea bulimoides techella Pitspry and Ferriss, Proc. Phil. Acad., 1906, 
p. 163, figs. 20-23—HeEnperson, Univ. Col. Studies, IV, pp. 81, 83, 93, 180, 1907.— 
Wa ker, Nautilus, XX, p. 108, 1907—Strecker, Nautilus, XXII, p. 65, 1908 — 
HeEnperson, Nautilus, XXIII, p. 144, 1910. 
Limnea bulimoides SIncLEY, Rep. Geol. Surv. Tex., IV, pp. 188, 1892; p. 
313, 1893.—Datt, Proc. Nat. Mus., XIX, p. 368, 1897.—And of authors generally. 
Lymnea caperata HINKiey, Nautilus, XX, p. 40, 1906. 
SHELL: Varying from obtuse to subfusiform; periostracum yel- 
lowish in color ; surface dull to shining, growth lines rather coarse, with 
but faint indications of spiral lines; the body whorl is frequently mal- 
leated, “the flattened facets obliquely descending;’ nuclear whorls 
1% wide and low, with a surface sculpture resembling satin finish 
(pl. XLIX, fig. C) ; whorls six, convex, usually somewhat shouldered ; 
last whorl large, generally very ventricose; spire acutely conic, of 
variable length; sutures well impressed; aperture roundly ovate, from 
1/2 to 5/5 the length of the entire shell; inner lip broadly and flatly 
expanded and reflected, without a fold; the anterior extremity of the 
aperture is produced or effuse; umbilical chink large, rather widely 
open; outer lip simple, sharp; axis consisting of a series of smooth, 
round, hour-glass-shaped columns. 
