GOXIOBASIS. 215 



100. G. rubiginosa, Lea. 



Goniobasis nibiginosa. Lea, Proc. Acad. Nat. Sci., p. 270, 1802. Journ. Acad. 

 Nat. Sci., V, pt. :>, p. 33:^, t. 38, f. 193, March, 18G3. Obs., ix, p, 155. 



Description. — Shell cariuate, somewhat awl-shaped, rather thin, 

 shiuiug, reddish, obscurely bauded ; spire subattenuate ; sutures very 

 much impressed ; whorls about six, convex ; aperture very small, 

 subrhomboidal, pale reddish aud obscurely double-banded withiu ; 

 outer lip acute, sinuous; columella slightly bent in aud twisted. 



Operculum broadly ovate, dark brown, with the polar point near 

 the left margin above the base. 



Habitat. — Oregon; "W. Newcomb, M.D. 



Diameter, •21 ; length, -74 of an inch. 



Observations. — Two specimens only were sent to me by Dr. W. 

 Newcomb. The four upper whorls are carinate, aud a Fig. 427. Fig. 428. 

 small, thread-like line below runs parallel with the more 

 raised one. The two obscure bands are near to each 

 other and are in the middle of the whorl. In outline 

 it is near to Melania (Goniobasis) ni(jrina (nobis), but 

 it is a larger species with a less polished surface aud of a very much 

 lighter color. It differs entirely in being carinate. In both these 

 specimens the whorls are slightly depressed below the suture, which 

 modifies the outer lip. One of the specimens has an obscure, 

 brownish spot inside at the base of the columella. The aperture is 

 about two-sevenths the length of the shell. — Lea. 



Mr. Lea's figure, of which the aceoinpanying one (Fig. 427) 

 is a copy, does not exhibit plicae on the spire, nor does his 

 description mention their existence, still I am convinced that 

 when specimens with more perfect spires are discovered, they 

 will, in common with the other lengthened species, exhibit this 

 character. Except in the character of the carinated upper 

 whorls this shell is allied to Shastaensis. 



101. G. Bairdiana, Lea. 



Goniobasis liairdinva, LEA, Proc. Acad Nat. Sci.. p. 267, 1802. .Tour. Acad. Nat. 

 Sci., V, pt. 3, p. 317, t. 37, f. 164, March, 1SC3. Obs., ix, p. 139, t. 37, f. 164. 



Description. — Shell folded, somewhat drawn out, dark brown, rather 

 thick, single-banded; whorls subattenuate, sharp-pointed; sutures im- 



