The Genus Gyrotoma 29 



type of cylindracemn must be considered lost and the species cannot be recog- 

 nized with any exactness from the description. Hinkley (2, p. 40) thought 

 the shell might be a form of cllipticmn Anth. 



Spurious Species 



Melatoma sphaerica Anth. is apparently an Anculosa belonging to a 

 described species of the group A. picta Conrad. Habitat, Coosa River, Ala- 

 bama. References : 



Melatoma sphaerica Anth., MSS., Reeve, Monog. Melatoma, sp. 8, April, 1861. 

 Schizostoma sphaericum Anth., Lewis, Amer. Journ. Conchol., V, 1869-70, p. 169; 

 Tryon, Monog. Strepom.. 1873, p. 364; Lewis, Fauna of Ala., 1876, p. 23. 

 Anculosa sp., Goodrich, Anculosae of Ala. River Drain., 1922, p. 56. 



H. & A. Adams list Gyrotoma altilis Anth., conica Say, curvata Say and 

 foremanii Lea. The altilis possibly refers to Gillia altilis Lea. Shuttle- 

 worth's G. conica may be intended or Melania conica Say, a Pleurocera. 

 Tryon (10, p. 132) appears to think that curvata refers to Pleurocera cur- 

 z'atuin Lea. Two Melanians were named foremanii by Lea, but neither 

 "belongs to Gyrotoma. Paetel repeats these errors and adds aequalis Lea, 

 circumlincata Tryon, Coosaensis Lea, elUpsoides Lea, rubiciinda Lea and 

 zxiuxiana Lea, all belonging to other genera than Gyrotoma, besides angu- 

 lata Lea, having reference probably to Melania angulata Anth., a Gonio- 

 basis. 



Reeerences 



I. Hannibal, Harold, "A Synopsis of the Recent & Tertiary Freshwater Mol- 

 lusca of the Californian Province", Proc. Malacol. Soc, X, 1912. 



2. Hinkley, A. A. "List of Alabama Shells Collected in October and November, 

 1893." Nautilus, XVHL 1904, PP- 40, 41 • 



3. Jordan, D. S., "The Origin of Species Through Isolation". Science, n. s., 

 XXH, 1905. 



4. Lewis, James, "Catalogue of the Shells of the Coosa River, Alabama." Amer. 

 Journ. Conchol., V, 1869-70, p. 168. 



5. Lewis, Tames, "Fauna of Alabama; 1, Fresh Water and Land Shells. Geolog. 

 Survey of Ala., preface dated Oct. 24, 1876. 



6. Ortmann, a. E., "The Crawfishes of the State of Pennsylvania." Memoirs 

 Carnegie Museum, IL 1906. 



7. Ortmann, A. E., "A Monograph of the Naiades of Pennsylvania." Part HL 

 Memoirs Carnegie Museum, VHL Dec, 1919. 



8. Reeve, L. A., "Conchologia Iconica." Melatoma, London, 1860-61. 



9. RuTHVEN, A. G., "Variations and Genetic Relations of the Garter-Snakes." 

 U, S. Nat. Mus., Bulletin 61, 1908. 



10. Tryon, Geo. W., Jr., "Land & Freshwater Shells of North America, Part 4, 

 vStrepomatidae." Smithsonian Misc. Coll., No. 253, 1873. 



II. Willis, J. C, "Age and Area." Cambridge, 1922. 



