314 LAND AND FRESri-ArATER SHELLS OF N. A. [PAKT IV. 



Diameter, -43; length, -90 of an incli. 



Observations. — Dr. Foreman submitted many specimens of this spe- 

 cies to my examination, and I find them differing very much in form 



Fig. 003. Fig.GOi. Fig.coj. ^"^ "^'olo'"- Some individuals are so full 

 of dark purple bands as to give them a 

 dark hue ; others are devoid of bands en- 

 tirely, and are yellowish. The aperture is 

 contracted and about one-third the length 

 of the shell. The transverse, raised stria), 

 in some, cover nearly all the whorls, while 

 others are almost or entirelj' free from them. In general outline it is 

 allied to JI. picta (nobis) all the specimens being more or less eroded 

 at the beaiis. I am unable to state the number of whorls, but believe 

 them to be eight or nine. I dedicate this species to my friend, Isaac 

 Hays, M.D.— iea. 



223. G. arctata, Lea. 



Melanin arctata, Lea, Pliilos. Proc, iv, p. IGG. Philos. Trans., x, p. 64, t. 9, f. 4G. 



Obs., iv, p. G4. liixxEY, Check List, No. 20. Bkot, List, p. 3-2. 

 Megara arctata, Lea, CiiENU, Manuel, i, f. 203i. Adams, Genera, i, f. 30G. 



Description. — Shell striate, compressed, thick, yellowish horn-color; 

 spire conical ; sutures much impressed ; whorls six, flattened ; aper- 

 ture small, rhomboidal, within whitish. 



Habitat. — Tuscaloosa, Alabama. 



Diameter, -40 ; length, -90 of an inch. 



Observations. — Among the seven specimens before me there is a 

 good deal of difference. Some are darker than others, pj^. (;Qy 

 Several have the superior portion of the whorl rising into 

 a ridge, quite nodose, while others are entirely without 

 it. This species has more resemblance to 31. Haysiana than 

 any other which has come under my notice. It is not, how- 

 ever, so elliptical a shell, and the aperture is shorter. The 

 apei'ture of the arctata is rather more than one-third the 

 length of the shell ; is obtusely angular below, and somewhat acutely 

 angular above, where it is thickened. — Lea. 



The nearest affinity of this species is with G, Coosaensis. 



