92 LAND AND FRESH-WATER SHELLS OP N. A. [pART IV. 



Mel. Ordiana. — Shell striate, pyramidal, dark brown; spire drawn 

 out ; sutures deeply impressed ; whorls flattened ; aperture rhombic ; 

 small, whitish. 



Habitat. — Alabama. 



Diameter, "52; length, 125 inches. 



Observations. — A single specimen only of this species is before me, 



and that unfortunately is decollate, in having 

 Fig. 175. •' 



lost, probably, four or five whorls : the four lower 



whorls are perfect. The outer lip is much curved, 

 giving the aperture an auger-lilje appearance and 

 causing the channel to be much impressed. On 

 the body-whorl there are four rather distant ele- 

 vated strife, three of which are large ; the whorls 

 above exhibit two. The aperture is about one- 

 fourth the length of the shell. This species re- 

 sembles M. canaliculata (Say), and M. annulifera 

 (Conr.). It has not the channel of the former, 

 and differs from the latter in having deeply impressed sutures, in the 

 form of the aperture, in the outer lip and in the striae. I dedicate 

 it to my old friend, Geo. Ord, Esq.— iea. 



The description of Mel. Ordiana quoted above answers 

 exactly to a variety of P. annuUferum, which varies much in 

 outline and in the development of the canal. In the Smith- 

 sonian Collection are preserved fine specimens of a variety of 

 this species in which the shell is much broader than usual, with 

 the periphery sharply angulated. 



34. P. Bnimbyi, Lea. 



Melania Brumbyi, LEA, Philos. Trans., x, p. 298, t. 30, f. 5. Obs., v, p. 5i. BrXNET, 

 Check List, No. 40. Brot, List, p. 30. Reeve, Monog. Melania, sp. 277. 



Description.— Shell striate, pyramidal, rather thick, reddish-brown; 

 spire very much elevated, carinate at the apex ; sutures but slightly 

 impressed ; whorls flattened ; aperture rather large, rhomboidal, within 

 rubiginose ; columella twisted. 



Habitat. — Coosa River, Ala. ; Huntsville, Ala. 



Diameter, -53; length, 1-72 iuches. 



Observations.— "This is a very remarkable species, and among the 

 largest of our Melania?. In form and size it is allied to annulifera, 



