280 PRO0EEDL\GS OF UNITED STATES NATIO:vAL MUSEUM. [TS'?.',. 



about one-third of the }iucleus; a chiuk iu Irout of the columelhir le- 

 Hection, but uo umbilicus; aperture rather long, rouuded iu Irout, 

 pointed behind, outer lip sharp, hardly thickened; columella reflected 

 with a solid white callus extended, though thinner behind, across the 

 body whorl to the posterior augle of the aperture; columella with two 

 teeth, the posterior large, its plaue at richt angles to the axis, its crest 

 extended forward in a curve forming a raised inner edge to the column, 

 inside of which is the smaller anterior tooth, its plaue parallel with 

 that of the larger one ; body whorl with a large, flattened, twisted tooth 

 at right angles to the surface on which it stands and with its direction 

 ibllowing the curve of the whorl inward ; Ion. of shell, 4 ., of aperture, 

 L' ; max. diam. of shell, 2""». 



Habitat. — Marco, Flu., in the moss on a dried-up brackish marsh. 

 Collected by H. Hemphill. 



This species at first looks like a young smooth Alexia, but is at once 

 distinguished by its columella and apex. It is possible that in older 

 specimens the outer lip may be thickened or dentate. In those received 

 there is no indication of anything of the kiud, but neither is there on 

 the specimens of the P. naticoides, which we know has a thickening and 

 little tubercle on the outer lip when fully adult. The epidermis is very 

 thin and smooth; there is no trace of sculpture; the appression of the 

 whorls at the sutures gives them in some lights a marginate aspect. It 

 is more elongate than. any described recent species. 



Genus Melampus Montfort. 



Melampiis Moatlort, Coucbyl., vol. ii,p. 318, 1810. 



Conovuhis Lamarck, Estr. d'un Cours, 1812, ol'tni ; Bowdicli, El. Couch., pp. 



28, 63, 1822. 

 Type Melampus coniformis Brugiere, = Voluta coffea hmu6, Syst. Nat., ed. xii, 



p. 1187, Barbados. 



Subgenus Melampus s. s. 



Shell oval conoid, the spire shorter than the last whorl; whorls nar- 

 row, the aperture correspondingly sublinear, columella strongly plicate ; 

 parietal border with from one to five teeth or ridges; outer lip thin, 

 sharp, simple, within Urate to a thickened border behind the i)eristome; 

 anterior margin rounded ; the aperture widest anteriorly. Foot trun- 

 cate in front, bifid or indented behind ; tentacles contractile, subcylin- 

 drical, anuulatily wrinkled; muzzle long, emargiuate in front; eyes at 

 the inner bases of the tentacula. 



Melampus coffeus Liuu6. Plate 18, fig. 3. 



CiiJla coffia Linne, Syst. Nat., ed. x, p. 729, 1758. 



Voluta minuta Guieliu, Syst. Nat., 3436, 1789, ex parte. 



Bidimns coidjormis Brugiere, P^ucycl. Metli., l,p. 339. 



Conovuhis coniformis Lamarck, An. s. Vert., 2d ed. viii.p. 391. 



Melampus fnsca Morch, Cat. Yoldi, p. 38, 1852, as of Martyn. 



Auricula co»(?/orm(s D'Orbigny, MoU. Cuba, l,p. 187, pi. sili, tigs. 4-7, 1841.* 



Melampus coffeus H. & A. Ads., Gen., ii,p. 243, pi. 82, flg.s, 7,7a, 1855. 



*The legend on tire idate has the numbers transposed witli these of A. ovula. 



