OF CONCHOLOGY. 11 



7. Lymnea Wilsonii, Tryon.— t. 2. f. 17. 



Description. — Shell sinistral, sub-fusiform, thin ; spire elon- 

 gated, acute, suture deeply impressed ; whorls 6, convex, oblique, 

 rapidly increasing in size, the last narrowly oval; aperture sub- 

 ovate, half the total length, narrow, columella a little twisted 

 and reflected, leaving a narrow, deep umbilicus. Light amber- 

 color. 



Dimensions. — Length 22 mill., diam. 10 mill. 



Habitat. — New Zealand. 



My Cabinet. Cabinet of the Academy of Natural Sciences, 

 Philadelphia. 



Observations. — This is one of the finest of the few sinistral 

 species. It may be compared with L. Timorensis, but that is 

 a heavier species, more rugose, with the spire more obtuse, 

 and not so convex. 



Dedicated to the memory of the late Dr. Thomas B. 

 Wilson. 



Lymnea Cubexsis, Pfr. I. St. Croix. Dr. R. E. Griffith. 



(Coll. Acad. Nat. Sciences.) 

 " " Terroya River, Vera Cruz, Mexico, 



Strebel. (Coll. Wheatley and 

 Tryon,) 

 " macrostoma, Say, Mexico. Berendt. (Coll. Wheat- 



ley.) 

 Amnicola Cincinnatiensis, Anth. Orizaba, Mexico. Bot- 



teri. (Coll. Wheatley.) 



