VARIATION AND ZOOGEOGRAPHY OF LIGUUS IN FLORIDA. Hf> 



L. poeyanus. The presence of rose (varying to pink or purple) on the parietal 

 wall and apex is evidently a very old character in Liguus. 



The pure colonies of L. crenatus in Florida show a great deal of local differ- 

 entiation. I have thought it well to apply names to the chief raoes. The 

 variation in length is roughly shown in the following table of measurementi of 

 specimens apparently adult, though some of the smaller ones of each lot may be 

 immature. 



Length in Mm. 



Fort Lauderdale. Klliott's K< \ 



59 

 58 

 57 

 56 

 55 

 64 

 53 

 52 

 51 

 50 

 49 

 48 

 47 

 46 

 45 

 44 

 43 

 42 

 41 

 40 

 39 

 38 

 37 

 36 

 35 

 34 

 33 

 32 

 31 

 30 

 29 

 28 



Upper 



Matecumbp. 



1 

 1 



2 



1 

 1 

 1 



2 

 3 



Windly'i I. 



liOWrr 



lUteeurub*. 



LOMtUHII '• 



K«7(I). 





1 







1 





1 



2 





2 



1 





2 



1 

 3 





2 



3 







3 



1 





6 





1 



3 



5 



3 





1 



6 







2 



1 





1 



* 





2 



5 





1 



6 





1 



12 





2 



17 

 10 



3 



1 



7 



LMttimn't 



l« (2) 



1 

 1 



1 

 I 



4 



2 



7 



I 



11 



3 

 4 



B 

 I 



i 



Lower Matecumbe Key (text-figure 11 and PL XXXVII, fig. 7a); WindJy 

 Island (PL XXXVII, fig. 7). This race rather closely imitates the Cuban 

 crenatus, but is differentiated in the following respects: the apex is larger. The 

 green bands are chiefly basal, as a general rule. The spire is longer. There 



is no colored or tinted sutural margin. Whorls 7}4 to 8. 



In the series of fifty odd shells from Lower Matecumbe, the cuticle may be 

 slightly green-tinged on the last whorl, but there is no yellow. In about half 

 of the specimens seen the green lines are faint, yellowish olive, or sometimes 

 wholly lacking, as in fig. 7a. The shell and columella are always thin. 



In a series of fifteen from Windly's Island, all are distinctly marked with 

 green lines. This race may be called L. crenatus subcrenatus. Length 58, 

 diameter 26, aperture 24.5 mm. (fig. 11). 



