116 MR. CONRAD'S DESCRIPTIONS 



P. EOT^DENS. PI. 11, fig. 26. — Narrow-subfusiform, small, with a profound deeply crenulated carina on 

 the body whorl and in the middle of each whorl of the spire ; suture margined with a prominent line 

 below and a minute one above ; large volution with distinct revolving lines and minute longitudinal 

 wrinkles; beak slightly produced, narrow, straight. Length ^. Rare. 



P. DECLiVA. PI. 11, fig. 27. — Fusiform, with subangular volutions, with strong prominent revolving lines 

 on the body whorl, alternated in size ; the whorl flattened and oblique above the angle, with four 

 unequal revolving lines ; lower whorls of the spire with three prominent revolving lines on the lower 

 half, and a fine intermediate line ; upper half with three minute revolving lines, and a larger prominent 

 one below and near the suture; aperture and canal about half the length of the shell. Length 1. 



Allied to P. servata, but wants the longitudinal ribs of that species. Rare. 



PHORUS. 



P. HUMiLis. PI. 11, fig. 46. — Depressed; volutions five, with comparatively large shells and fragments 

 adhering ; body whorl very wide, much depressed ; base flat; near the periphery concave. Width 8-10. 

 Height i. 



I found but one specimen of its shell, which seems to be less elevated than the 

 other species. 



BUCCINUM. 



B. MississippiENSis. PI. 11, fig. 28. — Turreted ; whorls eight, three from the apex smooth and entire; the 

 others with longitudinal regular distant ribs and intermediate wrinkles ; revolving lines raised, 

 alternate'd in size; labrum with eleven raised lines within, not extending to the margin ; columella 

 striated. Length 5-10. Common. 



TYPHIS. 



T. cunvmosTEATus. PI. 11, fig. 29. — Subfusiform ; volutions eight, scalariform, varices or ribs profound; 

 tubes long ; that near the margin of aperture thick, elongated ; beak elongated, spiniform, much curved. 

 Length 1-10. Not common. 



MUREX. 



M. MISSISSIPPIENSIS. PI. 11, fig. 30. — Subfusiform, with three elevated varices, and an intermediate 

 prominent obtuse longitudinal ridge ; between two of the varices on the body whorl is a smaller ridge; 

 revolving lines prominent, alternated in size, profound on the varices ; longitudinal wrinkles distinct ; 

 labium with six prominent lines within, the margin regularly foliated; canal long. Length, 1 7-10. 



It belonofs to the subj^enus Phyllonota of Swainson. 



MELONGENA. 



M. CRASSi-coENUTA. PI. 11, fig. 31. — Fusiform ; whorls concave above, and having a series of thick 

 prominent nodes on the angle of the whorls ; on the body whorl they are very large and thick, 

 becoming spines towards the mouth, that nearest the margin a very thick long recurved spine ; 

 towards the base is a series of thick short spines; revolving lines coarse, unequal, not very prominent, 

 waved ; longitudinal wrinkles coarse and distinct. Length of fragment 3. 



