Monograph of the Cones of North America. 123 

 not the case, in our shell, or in either of the figures to which he 

 refers. See Lister, t. 784, fig. 31, and Enc. Meth. t. 320, fig. 9. 

 Conus Leucosticus. Gmelin. Plate 3, fig. 4. 



Shell conical ; white, marbled with brown or yellow ; spire 

 acute and coronated ; body whorl marked with transverse granu- 

 lated striae, especially near the base ; length about an inch and 

 half, and half as broad. 



Many varieties of this beautiful species inhabit the West-Indies, 

 and, as it is said, other parts of the world. Those found on the 

 Florida Keys are commonly about an inch long ; but in other pla- 

 ces they often reach twice that size. Some of the varieties of the 

 C. Leucosticus resemble very much the far famed C. cedo-nulli, 

 a specimen of which, now in the museum at Paris, has been valu- 

 ed at 1500 dollars. 



Conus Pealii. New species. Plate 3. fig. 3. 



Shell conical ; whitish, marked with light yellow irregular 

 stripes : these markings on the whorls of the spire give them a 

 nodulous aspect, being alternately white and yellow ; spire acute ; 

 the whorls coronated at their edges 5 body whorl traversed 

 throughout with deep transverse grooves, forming regular rounded 

 ribs ; length less than an inch, and half as broad. 



This pretty little cone was found by Mr. Titian R. Peale, near 

 Key Vache, on the Florida coast. While exploring the extensive 

 and interesting shoals in that region, this enterprising and acute 

 naturalist discovered three other species of the genus conus, all 

 of which appear to have been undescribed ; but from their worn 

 and mutilated state, it would be injudicious to introduce them at 

 present into our Fauna. 



Conus Mamillaris. New species. Plate 3, figs. 5 and 6. 



Shell conical ; smooth ; yellowish white ; spire depressed, and 

 terminated at its apex with a whitish mamillary knob ; whorls of 

 the spire channeled, having a double indented line on each, which 

 follows their whole course, but is rarely apparent on the outer 

 whorls ; length two inches, breadth one inch. 



This shell, which in its perfect state must be a splendid spe- 

 cies, was found in Florida by Mr. Peale. The colour and mark- 

 ings on the body whorl are a good deal defaced. The spire is al- 

 most perfect, and the shell is here marked with orange coloured 

 spots on a whitish ground, something like the Conus tesselatus, 

 to which it bears a distant resemblance in other respects. 



