NATURAL SCIENCES OF PHILADELPHIA. 85 



Subgenus Cyclas, Klein. 

 (notBrug.) Meth. Ostracol. 129. 1753. 



38. L. dentata, Wood. Gen. Conch. 195, t. 46, f. 7. 1817. 



L. strigilla, Stimpson, shells, N. E. 17. 1851. 



L. Americana, C.B. Ad. Contrib. Conch. 243. 1852. 



L. Chemnitzii, Phil. Zeit. Mai. 1848. 



L. dioaricata, Lam. (not Linn.) Anim. s. Vert. v. 541. 1818. 



L. divaricata, (part) Chemn. Conch. Cab. vi. 134, t. 13, f. 



129. 1782. 

 L. quadrisulcata, Orb. Toy. Amer. Merid. 584. Moll. Cuba, 



ii. 294, t. 27, f. 34, 36. 

 L. Lamar ckii, Dunker, Weinkauff, Journ. Conch, x. 315. 



1862. 

 L. eburnea, Reeve, Icon. sp. 49. 1850. 

 L.pilula, C. B. Ad. Contrib. Conch. 244. 1852. 

 L. Sechellensis, Orb. Voy. Am. Merid. 384. 

 L. Cumingii, Ad. and Ang. Zool. Proc. 426, t. 37, f. 20. 



1863. 

 L. serrata, Orb. Voy. Am. Merid. 384. Moll. Cuba, ii. 295, 



t. 27, f. 37, 39. 1853. 

 L. ornata, Reeve, Icon. sp. 48. 1850. 

 L. ornatissima, Orb. Toy. Am. Merid. 384. 

 New England to Brazil, W. Coast N. and S. America, E. Coast 

 of Asia, Seychelles, Isl. Bourbon, Australia. 1 



39. L. divaricata, Linn, (not of Lam. etc.) Syst. Nat. Ed. xii. 



1120. 1767. 



L. digitaria, Poli (not Linn.) Test. Utr. Sicil. t. 15, f. 25. 

 1791. 



1 It is very curious to observe that most of the above distinguished authors, 

 finding that the West Indian divaricata of Lamarck, Gmelin, and Chemnitz 

 is distinct from the European divaricata of Linn., have each immediately 

 rechristened the former without troubling themselves to ascertain whether 

 any one else had previously made the same discovery. To this carelessness, 

 and to the insane desire to describe species, are to be ascribed the terrors of 

 the science to the novitiate, who in nine cases out of ten is frightened at 

 the very threshold by an heterogeneous mass of a hundred thousand names, 

 representing probably not more than one-fifth that number of species. Long 

 and familiarly known to Conchologists as this species is, they have per- 

 mitted nearly all of the above synonyms to stand as distinct species. The 

 geographical range is great, but well established by numerous authorities. 

 1872.] 



