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24 NERITA. 



Var. PR.ECOGNITA, C. B. Ad. Fig. 63. 



Embraces the lighter colored specimens, being yellowish grey, 

 upon which are blackish maculations composed of separate short 

 lines and markings, sometimes forming indistinct, irregular, inter- 

 rupted bands. 



Var. Bernhardt, Recluz. Figs. 66-69 ; PI. 9, fig. 63. 



Spire usually somewhat flatter so as to form an obtuse, almost 

 obsolete shoulder-angle, color varying from black to spotted, and 

 maculated with yellowish grey or orange color. Size somewhat 

 smaller. 



West Coast of N. America, Panama, Mazatlan. 



Usually distinguished by the above chai-acteristics, which are, 

 however, all shown not infrequently by occasional West Indian 

 specimens. N. funiculata, Menke, and N. genuana, Reeve (fig. 68), 

 are synonyms ; to which may probably be added N. alhipunctata, 

 Reeve (fig. 65, and PI. 9, fig. 63), the locality of Avhich is unknown. 



N. TESSELLATA, Gmcliu. PL 4, figs. 71-74 ; PI. 9, fig. 69. 



With ten or twelve rounded low ribs, separated by deep, narrow 

 grooves, white, strigate, tessellated or nearly covered with black ; 

 aperture white, lip with numerous plicate teeth within, the upper 

 and lower ones larger, columellar edge concave, with small teeth in 

 the middle, area flattened, with a few granules. Diam. 18-24 mill. 



West Indies, Florida. 



Sometimes the ribs are more numerous by their division, and by 

 the interpolation of smaller intermediate ones. The species is al§o 

 subject to erosion in such manner that the black markings become 

 elevated and the ribs obliterated, in this condition becoming ^• 

 exarata, Pfr. Other synonyms are N. varia (Meusch.), Morch, JSf. 

 Antillarum, Gmel., N. .striata, Chemn., N. Listeri, Recluz (fig, 73), 

 a nearly black condition, as is also N. nivosa, Reeve (fig. 74), re- 

 ferred here with some doubt, and N. comma-notata, Reeve (fig. 72), 

 and N. scalpta, Reeve (fig. 69), the localities of both of which are 

 unknown. 



Section Peloronta, Oken. 1815. 



N. PELORONTA, Linn. PI. 4, figs. 75-77. 



With broad, flatly rounded ribs and narrow intervening sulci — 

 which very seldom give rise to very small riblets ; yellowish or 

 whitish tessellated or marked in a zigzag manner with dark red and 

 black, the tessellations sometimes forming broad spiral bands in 



