GONIOBASIS. 207 



Diameter, -48 of an inch (12 millim.) ; lengtli, 1-28 inches (33 mil- 



lim.)- Length of aperture, -35 of au incli (9 millim.); ^. 



■> ° ^ ' ^ ' ' Fig. 408. 



breadth of aperture, "20 of an inch (5 millim.). 



Observations. — The most striking characteristic of this 

 species is its robust, cylindrical form, combined with its 

 pale sutural region; compared with M. teres, Lea, it is 

 much less slender and turreted, nmch more plicate, and 

 the whorls are less inflated. 31. rvfa is not folded, and 

 is a more acutelj' elevated species. The curve in the colu- 

 mella resembles that of M. cnJumella, Lea, but that shell is much less 

 elongated, has only six whorls, and is destitute of distinct folds. — 

 Anthony. 



91. G. concinna, Lea. 



Mdanin concinna, Lea, Philos. Proc, ii, p. U, Feb., 18tl. Philos. Trans., viii, 

 p. 183, t, G, f. 43. Obs., iii, p.21. DeKay, Moll., New York, p. 98. TnooST, Cat. 

 Shells, Tennessee. Wheatley, Cat. Sliells. U. S., p. 24. C.vtlow, Conch. 

 Komenc, p. ISG. Bixney. Check Litt, No. i>i. Bkot, List, p. 34. 



Melasma concinna, Lea, Adams, Genera, i, p. 300. 



Description. — Shell folded, acutely turreted, thin, brown; spire 

 drawn out ; sutures impressed ; whorls nine, carinate, flattened ; 

 Fi"- 409 iiperture small, elliptical, angular at base, whitish. 

 Habitat. — Tennessee. 

 Diameter, -25; length, -75 of an inch. 



Observations. — A single individual only was received from 

 Dr. Troost. Its mouth is about one- fourth the length of Un'. 

 shell. It is remarkably flattened on the whorls, and the 

 superior part is transversely striate. — Lea. 



This species resembles baculum, hut is narrower, smaller, 

 and the plications are closer. It has been extensivel}'- dis- 

 tributed b}- Mr. Anthony as a variety of comma. Allied to 

 eJimimita., but differs in the plica?, being smaller, also in tlie 

 form of the mouth : the shell is rather stouter and the body- 

 whorl more angular. 



92. G. eliminata, Anthony. 



Melanin eliminata, Anthony, Ann. New York. Lye. Nat. Hist., vi, p. 97, t. 2, f. 15, 

 uiar., 1854. Binney, Check List, No. 08. Brot, List, p. 34. 



Drscription. — Shell conic, thin, brownish; spire slender, elevated; 

 whorls about eight, convex, with transverse folds and spiral striae, 



