212 MR. CONRAD'S NOTES ON SHELLS, 



T. VARIEGATUS, Lam. Three species have been confounded by authors under the 

 name of T. variegatus. Reeve in his figures and observations clearly represents the 

 difference between the East Indian and one of the West Indian species, which last I 

 name nohilis. The former I regard as the type of Murex tritonis, Lin. The third 

 species is common in the West Indies, and is smaller and more ponderous in 

 proportion. The following characters may serve to designate the species : 



]. T. TRITONIS. — Spire with coarsely granulated striae; labrum expanded, widely reflected*, margin deeply 

 scalloped ; columella with broad slightly raised plaits, with narrow brown grooves between. (East 

 Indies. 



Reference to Triton tritonis. 



Bonani. Rec. fig. 188. 



Rumph. Mus. t. 28, fig. B and 1. 



Petiver. t. 12, fig. 15. Buccinum tritonis. 



Gualt. Test. t. 48, fig. A. 



Seba. Mus. t. 73, three large figures. 



Favanne. Conch. PI. 32, fig. G 1, G 2. 



Murex tritonis, Lin. Syst. Nat. 



Martini. Conch. 4, t. 134, fig. 1277, 1281. 



Reeve. Conch. Icon. PI. 2, fig. 3b. 



2. T. NOBiLis, Con. — Dilated, ventricose, humped on the upper part of the body whorl, about which three 



ribs are prominent, rounded, lower one broadest. (West Indies.) 11. 5f. 



Reference to Triton nobilis. 



Favanne. 32, fig. G, 1, 2. 



Blainville. Malacol. PI. IS, fig. 3. 



Triton variegatus, Reeve. Conch. Icon. Pi. 1, fig. 3a. 



3. T. VARIEGATUS. — Thick and heavy, slender ; upper whorls with minutely granulated revolving lines ; 



columella brown with white plaits, mostly narrow. (West Indies.) 



Reference to Triton variegatus. 



Lister. Conch, t. 959, fig. 12. 



Seba. Mus. 3, t. 73, two upper figures. 



Martini. Conch. 4, t. 134, fig. 1277, 1281, and t. 135, fig. 1282, 1283. 



Wood. Index Test. PI. 27, fig. 95. 



Keiner. PI. 2. 



* The character of the reflected patulous labrum becomes most decided in the largest specimens. Young shells 

 do not possess it. 



