MUSEUM OF COMPARATIVE ZOOLOGY. 227 



Lampusia pileare Lamarck. 



Triton pileare Lamarck, An. s. Vert, VII. p. 182, 1822 (syn. excl.). 

 Murex costatus Born, fide Morcli, Malak. Blatt., XXIV. p. 28, 1877. 

 Triton americanum Orbigny, Moll. Cuba, II. p. 163, pi. xxiii. fig. 22, 1846. 

 Triton brasilianum Gould, Proc. Bost. Soc. Nat. Hist., III. p. 142, 1849. 

 Triton Martinianum Orbigny, Moll. Cuba, II. p. 162, 1847. 



Triton Vetiei Calkins, Proc. Davenport Acad. Sci., II. p. 235, pi. viii. figs. 1, 2, 1878 

 (ex typ.). 



Habitat. Florida, Velie, Calkins. Antilles, Mexican coast, Bahamas, vari- 

 ous collectors. Bermuda, Goode. 



The Murex pileare of Linne was insufficiently described, and illustrated by 

 erroneous references, as shown by Hanley. Consequently the name should 

 stand as of Lamarck. Born's name is involved in doubt. The later synonyms 

 are not doubtful. It is a very variable species, and suffers from wear on the 

 beaches so as materially to change its appearance. Hence the numerous re- 

 descriptions under new names. 



Lampusia gracile Reeve. 



Plate XXIX Fig. 2. 



Triton gracile Reeve, Conch. Icon. Triton, fig. 58, 1845. 



Habitat. Barbados, 100 fms. Cape Catoche, Yucatan, in 24 fms., U. S. Fish 

 Commission. Aspinwall, Dall. St. Thomas, Riis. 



I cannot agree with Mr. Tryon in referring this rather rare and elegant form 

 to T. vcspaceus Lamarck as a synonym. 



Lampusia? pharcida Dall. 



PI ate XXXVI. Fig. 2. 



Shell yellowish white touched or tinted with brown, aperture pure white; 

 spire roughly three-sided, with four whorls and a four-whorled subcylindrical 

 nucleus; nucleus smooth with rounded subequal whorls and a rather blunt 

 apex; spiral sculpture of eight to ten subequal flattened riblets, with wider 

 channelled interspaces and a larger thread on the periphery, five or six moderate 

 threads on the canal, and occasional intercalary finer threads ; four of the rib- 

 lets are above the periphery; transverse sculpture of faint lines of growth, and 

 stronger impressed lines which indent the spirals and give their own interspaces 

 the effect of obscure ribs; beside these there are about three lumpy elevations 

 between each pair of varices, the middle one largest; and every two thirds of a 

 whorl a prominent rather flattened rounded varix, sculptured by the spirals 

 and incremental lines, only moderately concave behind; aperture relatively 

 small, ovate, Urate, and thickened all round; the outer lip with about six lira 1 . 



