446 A MANUAL OF AMERICAN LAND SHELLS. 



the lateral expansions and basal excavation of the central tootb, but 

 both these characters are much more developed than in the centrals, 

 and, from the want of symmetry in the teeth, are found only on the 

 outer side of each tooth ; the upper edge is squarely reflected ; the re- 

 flection is very large, extends half-way to the lower edge of tbe base 

 of attachment, and is produced beyond that into a blunt, stout cusp 

 bearing a stout cutting point; the side cusps are almost obsolete, the 

 inner one is much larger than the outer one, neither with distinct cut- 

 ting point. The marginal teeth are a simple modification of the lat- 

 erals, being reduced to a subquadrate shape, with the cutting point of 

 the cusp much more produced. 



I give on Plate V, Fig. P, of Terr. Moll., V, and also in Fig. 491, a 

 groui) of central and laterals in a, a marginal in b. 



I have also examined V. olivacea, the only other species found within 

 our limits. Its dentition is the same. 



For genitalia see below, under V. Floridana. 



Veroiiicella Floridana, Binney. 



Animal (contracted in alcohol) elongated-oval, about four times as 

 long as broad, the sides very slightly curved and the extremities cir- 

 ^' "•• '*•'"• cularly rounded ; back con- 



vex, regularly arched in 

 ^^~^ "^ every direction; surface 



very slightly wrinkled ; 

 color dark ashy-gray, mot- 



Veronicella Floridana. tlcd with bhick, with a me 



diau whitish line, on each side of which, at about one-third the distance 

 towards the margin, is an ill-defined stripe of black; beneatji drab-col 

 orcd ; foot occupying about one-third the width; eye peduncles short, 

 annnlated, the tentacles not very distinctly bifurcate. Length, 50'""'; 

 breadth, 18'"'". 



Vaj'niulus Floridaints, Binney, Terr. Moll., ii, 17, pi. Isvii (1851). — Leidy, T. M. U. 



S., i, 251, pi. iv, anat. 

 FfionictUa Floridana, Ciienu, Mau. de Conch., i, 472, figs. 3501, 3502 (1859).— W. G. 



Binney, L. & Fr.-W. Sh., i, 305 (1869); Terr. Moll., v, 240.— Tryon, Am. 



Joimi. Conch., iii, 317 (18,68). 



Jaw arcuate, narrow, ends rounded, anterior surface with 24 ribs, 

 Fi(;.492i. crenulating the concave margin. (Fig. 492^i.) 

 #^^^ Lingua] membrane : see p. 445. (Plate V, Fig. P, of T. . 



Jaw (if Vrroni- ixr -y x 

 cella Floridana. -iH., V.) 



