GONIOBASIS. 243 



Diameter, -31 ; length, -58 of an inch. 



Observations. — Two specimens were sent to me many years since 

 by Prof. Brumby, and I then considered them to be a variety of Mela- 

 nia (Goniohasis) Nickliniana (nobis). They differ, however, . 

 in being more angular at the base of the aperture, in being 

 thinner, and in having the upper whorls carinate. The two 

 specimens before me are different in the color and markings. «■! 

 The one from which the diagnosis is made is of a darker 

 green and has not four well defined bauds like the other, but it has 

 two broad, indistinct ones above and below, and the lower half of 

 the columella is purplish. The aperture is more than half the length 

 of the shell. I dedicate this species to my friend, W. S. Vaux, Esq., 

 who has done so much to promote the objects of our Academy. — Lea. 



135. G. larvseformis, Lea. 



Melania larvffformis, Lea, MSS. Reeve, Monog. Melania, sp. 357, Dec, 1860. 

 Brot, List, p. o8. 



Description. — Shell conically ovate, olive ; whorls six to seven, 

 Fig. 474. smooth, the first few minutely keeled ; aperture ovate. 

 (Lea, manuscript in Museum Cuming.) 

 Habitat. — United States. 



Observations. — Of few whorls, convex and smooth, but yet 

 minutely keeled uear the apex. — Eeeve. 



This species is certainly very closely allied to ehemim or 

 Vaxixiana, but I am unable to decide whether it is identical 

 with either of them or not. 



138. G. auricoma, Lea. 



Ooniobasia auricoma, Lea, Proc. Ac-id. Kat. Sci., p. 2fi.5, 1802. Jour. Acad. Nat, 

 Sci., V, pt. 3, p. 308, t. 37, f. 148, March, 1863. Obs., ix, p. 130. 



Description. — Shell smooth, fusiform, rather thin, honey-yellow, 

 banded; spire very obtuse; sutures linear; whorls five, scarcely con- 

 vex; aperture very large, subrhomboidal, yellowish within; outer 

 lip acute, scarcely sinuous; columella bent in and slightly thickened. 



Habitat. — Tennessee River; Wm. Spillman, M.D. 



Diameter, -25; length, -40 of an inch. 



Obscrvatioiis. — A single specimen only of this little species was 



