ALEXIA. 463 



far from any water in a garden in the District of Columbia, whither 

 it was introduced on plants from Charleston, S. C. With the ex- 

 ception of the two last mentioned, the American species arc found 

 on salt marshes and in brackish water near the sea. 



Of the o-cofi'raphieal distribution of our species but little is yet 

 known. Melampus bidentatus is found from Maine to Texas. 



Ocnus ALEXIA, (Leach,) Gray. 1S47. 



Foot simple beneath, without a transverse groove. ^'=- ''^^■ 



Jaw narrow, slightly arcuate, extremities but little at- 

 tenuated, striije obsolete, scarcely any median projection. 

 Shell oblong-ovate, thin, spire pointed ; last whorl large, 

 rounded at base ; aperture rather broad, oval, acuminating ; 

 parietal wall furnished with from one to five tuberculous 

 laminffi ; columellar fold oblique ; peristome expanded, /"j^j^o^^,. 

 armed with teeth, or thickened within. Enlarged. 



But one species is known to inhabit Xorth America. Most of the 

 few foreign species inhabit the coasts of the Mediterranean, though 

 the genus is represented in South America and the West Indies. 



Alexia myosotis. 



Fig. 129. 



Shell ovate-conical, .smooth, reddish horn-color; spire elevated and pointed; 

 inner Hp with three teeth; lip reflexed. 



Anricida myosotis, Dr^parnacd, iSc. 



Auricula dentiruliila, GouLi), Inv. of Mass. 199. fiff. 129 (excl. Vohitn drnticiiJata, MoxT. et 



syn. sui.s.) (1841), not of Moxtfout. — De K.vy, N. Y. Moll. 58, pi. 5, figs. 91, 93 



(excl. Valuta deiiticulafa, Mont, ct syn.), nee Montfort. 

 Mchimpiis borenlis, CosRxn, Am. Journ. Sc. [1], xxiii. .34.5 (1833). 

 Alexia mi/osotis, Pfeiffer, Mon. Auric. Viv. 148; Brit. Mas. Auric 114. — W. G. Biy- 



NEY, Terr. Moll. iv. 172, pi. 75, fig. 33; pi. 79, fig. 16; L. and Fr. W. Shells, iii. 



4, fig. 4 (1865). 

 Cari/rhiuiii (Phijtia) imjosotis, Moquin-Tandox, Moll. Fr. ii. 417, pi. 29, figs. 33-39; pi. 



.30, figs. 1 - 4. 

 Conooulus mijosotis, Reeve, Br. L. and Fr. W. Shells, 130 (1864). 



Shell of an elongated oval form, sliglitly opaque, shining, horn 

 color, often tinted with reddish or violet ; lines of growth very faint ; 

 spire elevated and pointed, composed of seven or eight slightly con- 

 vex whorls, separated by a well-defined suture, which often has a 



