242 AMERICAN JOURNAL. 



little species to my friend Spencer F. Baird, of the Smithsonian 

 Institution, to whom I am greatly indebted for many kind 

 services, and who has done so much for the advancement of 

 the Natural Sciences of our country." 



This little species is not so cylindrical in form as the pre- 

 ceding ones. I have seen no specimens save those collected 

 at the original locality; all of these are remarkably uniform 

 in size, form and coloring. Oon. Draytonii, Lea, inhabits the 

 same region, but is very constantly distinguished by its whorls, 

 peculiarly resembling a coiled rope, by its heavy texture, and 

 dark interior, Draytonii also appears to be never plicate, and 

 its spire, though equally attenuate below, is more obtuse at 

 the apex. 



6. GoNioBAsis Draytonii, Lea. — t. 24, f. 11. 



Description. — "Shell smooth, conoidal, somewhat thick, dark 

 chesnut-brown, without bands, or obscurely banded; spire 

 somewhat raised; suture very much impressed; whorls about 

 six, convex; aperture small, ovate, dark brown within; outer 

 lip acute, slightly sinuous; columella very much bent in and 

 twisted. 



Operctdum subrotund, thin, light brown, with the polar 

 point well towards the middle on the left. 



HaUtats. — Fort Greorge, Oregon. J. Drayton. Also at 

 Walla. 



Dimensions. — Diam. -27 inch, length -68 inch. 



Remarhs. — A number of these specimens were sent to me 

 by Prof. J..' Henry, Secretary of the Smithsonian Institution, 

 having been collected by the late Mr. Drayton, and to his 

 memory I dedicate it. It is allied to Melania (Goniobasis) ni- 

 (jrina (nobis), but is not so polished, and is a much thicker 

 shell. Some of the specimens before me have a thickened 

 outer lip, with a lighter margin. The deep color within is 

 made by broad obscure bands. Some of the specimens have a 

 white thickening in the interior at the base, and some have a 

 lio-hter brown mark on the exterior at the base of the axis." 



The suture is bordered below by a raised line, which causes 

 it to appear almost canaliculate. 



Besides the above localities in Oregon, I have specimens 

 from Napa Co., Table Mt. Butte Co., and Clear Creek, Shasta 

 Co., Cal. These specimens are all uniform in size and form; 

 they are always very dark reddish-brown, the surface nearly 

 devoid of polish, and intensely red-brown within. 



I formerly considered Gon. nigrina, Lea, a synonym of this 



