22 PKOCEEDIXGS OF THE NATIONAL MUSEUM vol. 73 



bit of forest, into which I have carried many specimens from else- 

 where, the birds have attacked them, and now scarcely one remains. 



I do not believe that it is possible to make a key that will enable 

 anyone to identify all the material in any considerable collection of 

 Floridian Ligwas. Without a doubt most of the forms of fasciatus 

 and ci'enatus freely hybridize under favorable conditions, with the 

 result that there will be found a certain number of nondescripts that 

 can not be placed anywhere, while some that are of purer strain vary 

 so greatly that it is difficult to classify them. Still I believe that by 

 far the greater part of our material may be referred to some of the 

 names in this descriptive list. 



Many of the specimens in our collections have been killed in boil- 

 ing water, which causes some of the colors of the shell to fade or 

 otherwise change considerably. Under such treatment green is 

 almost certain to become bronzy or dirty grayish. In some cases 

 green lines become abraded even during the life of the animal, or 

 they may change color. 



The shells of solidus and its varieties are usually decidedly porcel- 

 lanous and brilliantly polished, while those of the other two species 

 are less so, but pseudopictus is comparatively glassy in some cases 

 but lacking this soft, translucent texture, and on the other hand 

 ehurneus is occasionally quite porcellanous. 



KEY TO THE FLORIDA LIGUUS 



Apex, columellar region or both, pink, purplish, or violet. 

 Shell decidedly ijorcellanous. 



Bluish or purplish axial smears present, never reduced to a mere line. 

 Shell rather thin. 



With a double sutural and peripheral row of brown spots-pictus. 



Without a double sutural and jx^ripheral row of brown spots. 



With a brown peripheral and green spiral line or band. 



lignumvitae. 



Shell solid (green spiral lines absent) graphicus. 



Bluish or purplish axial smears absent or if present reduced to a mere 

 line. 



Periplieral white zone with a central brown line delicatus. 



Peripheral Avhite zone without a central brown line simpsoni. 



Shell not porcellanous. 



Shell white, with broad supraperipheral and basal spiral bands. 



Spiral bands yellow or orange roseatus. 



Spiral bands not yellow or orange. 



Spiral bands chestnut castaneozonatus. 



Spiral bands not chestnut. 



Spiral bands broken into alternate light and dark axial 



streaks alternatiis. 



Shell white, greenish, or smoky white, with few to many green spiral 

 lines which are absent on the periphery livingstoni. 



