1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 281 



Floridianloealiiios: Bird Key, Jewett; Tar.ipa, Coiinul; ruutalvassa, 

 Ileinpliill; C<Hl;ir ICcys (?) IToiiipbill. It is quoted from Florida by 

 U'Orbigiiy, Arango, and Binuey : Cuba and Martinique, D'Orbiguy ; Ba- 

 hamas, Eawson ; Jamaica, Porto Eico, Giuulahipe, Texas, Mexico, and 

 Cayenne, by Arango, also by bim, erroneously, from Labrador ! 



The figure in the Genera of recent MoUusca, by A. Adams, whether 

 fiom the position of the animal or otherwise, does not show any bifur- 

 cation of the posterior end of the foot. 



The young and adolescent shells aie with difficulty separated from 

 those oH M. favus of authors. The double parietal lamina is the best 

 character, and this is sometimes double in M. Jfavus. There is no con- 

 stant criterion, and I should not be surprised if a larger number of 

 specimens would lead to the opinion that they should bear but one 

 specific name. This is not the Auricnla ovula of D'Orbiguy, as supposed 

 by Binney, who was apparently misled by the error in the lettering of 

 the i)late. 



This species is frequently marked by fine revolving striiB, especially 

 on the spire, where one line is generally present and near the other ex- 

 treme. The number of lirte varies ; they are, how^ever, usually more 

 numerous and more evenly distributed than in 3I.flavus. A form some- 

 what more elongated, with more pointed spire and less regular and nu- 

 merous lirse, and with the anterior parietal lamina more frequently 

 obsolete or even absent, has been called M. hennudensls. The 21. Giind- 

 laclii of Pfeifter from Cardenas, Cuba, is considered distinct by Arango, 

 but I have not seen any specimens of it. 



Melampus floridauus Shuttlewortb. Plate 18, fig. 2. 



Melampus jiorklanus Pfeiffer. Mon. Aur. Viv., p. 36, 1856, as of Sbuttleworth 



MSS. 

 Tralia Jloridiana H. & A. Adams, P. Z. S., 1854, iJ. 11, name only ; W. G. Biu- 



ney, 1. c, p. 16, 1865. 

 Mela77>pus floridanus Shuttle worth, Pfr. Mai. BUitt., 1854, p. 147. Name only. 



Habitat. — Florida Keys, Binney; Clear Lake, Florida, Wetherby; 

 near the town of Tampa, Fla., Stearns. 



Nothing is known of the soft parts of this species which is placed 

 here, because its conchological characters do not admit of its association 

 with Detracia hulloides, as has been hitherto done by authors. The two 

 sharp paiietal laminte remove it from that group, and it is therefore 

 remanded to Melampus until the soft parts are known. 



Melampus flavus Gmelin. Plate 18, iig. 1. 



Vohita Jiava Gmeliu, Syst. Nat., j). 34oG, No. 5, 1789. 

 Buliinus monUe Brugiere, Eucycl. Melb. 1, p. 338, 1789. 

 ConovHlus jlavuH Autoii, Verz. Conchyl., p. 48, No. 1768, 1839.. 

 Auricula monile Lamarck, Au. s. Vert., vi, x>t. 2, p. 141, 1822. 

 Melampub coronuii/s C. B. Adams, Coutr. Conch., p. 41, 1849, testa jnn. 

 JhJamints toro^a Morch, Cat. Yoldi, p. 38, 1852; as of Martyn. 

 Mehniipu'ijluvus C. B. Adams, Contr. Conch., pp. 42, 1H6, 1849. 

 JJelampus coronuhts H. & A. Adams, P. Z. S., 1854, p. 10. 

 Al€lani2)us Jlarua W. G. IMunej", I.e., 2d part, p. 12, 1865. 



