FAMILY LIMNIAD — LIMNEA. 75 
(EXTRA-LIMITAL.) 
. obrussa. (Say. Ac. Sc. 5.123. LL. decidiosa? Haun. 1.c. pl. 13, fig. 16-18.) Shell oblong, 
rather slender, pale yellowish, testaceous. Whorls five, slightly rounded; apex acute; suture 
deeply impressed; aperture not dilated, within pure white; columella with the sinus of the fold 
very obvious. Length, 0°4; diameter, 0°2. Philadelphia. 
. ferruginea. (Haup. 1. c. p. 49, pl. 13, figs. 19-20.) Shell ovate-conic, thin. Whorls four, 
convex; suture and columellar fold distinct; aperture oval, as long as the spire; labium appressed, 
ferruginous. Length 0:3. Oregon. 
. rugosa, Val. (Haun. l.c. pl. 3, fig. 4-5.) Ovate-conic, thin. Whorls six, convex, with very 
coarse accretional lines; aperture elliptic, longer than the spire; columella reflected on the last 
whorl, so as to form a small umbilicus. Color, white, with a spiral fulvous band. Mezico. 
. attenuata, Say. (Haup. |.c. pl. 9, fig. 1-5.) Long and slender. Whorls seven, slightly con- 
vex, revolving obliquely ; suture rather deep; apex suddenly pointed; aperture small and semicir- 
cular, sometimes expanded; fold on the columella well marked. Length, 1+0. Color, wood-brown. 
Mexico. 
. expansa. Haun. 1.c. pl. 9, fig. 6-8. Pu. 36, fig. 348 of this work.) Short, smooth, translucent 
and fragile. Body-whorl inflated; spire rapidly attenuated to an acute apex, and as long as the 
aperture. Whorls five, somewhat flattened; suture shallow, but very distinct; aperture effuse; 
columellar fold deep and distinct. Color. brownish ochre-yellow. Length, 1°0. Vermont. 
. solida et apicina, Lea. (Hatp. |. c. pl. 11, fig. 10-13.) Shell obtusely conical, smooth and um- 
bilicate. Whorls 4-5, convex; suture deep; apex pointed; aperture polished, subovate; fold 
conspicuous only in the young. Color, pale bluish grey; aperture various shades of reddish 
brown; young ochraceous. Length, 0°5. Oregon. 
. bulimoides, Lea. (Haun, 1. c. pl. 13, fig. 9-10.) Shell short, inflated, composed of about four 
convex whorls. Surface smooth and shining; lines of growth inconspicuous and undeviating, not 
crossed by spiral strie ; aperture as long as the spire, level, subround and slightly produced poste- 
riorly; labium closely appressed, except anteriorly, where it forms a small umbilicus; columella 
without fold; spire generally much eroded; apex frequently truncated. Color, pale ochraceous, 
sometimes with reddish varicose bands. Length, 0°5. Oregon. 
. vitrea. (Hap. 1. c. pl. 13, figs. 14-15.) Shell ovate, extremely thin and delicate. Surface smooth 
and polished ; lines of growth very fine; labium with a well marked fold, and is not appressed 
anteriorly; spire short. Length, 0°5. Ohio? Missouri. 
10* 
