24 PROCEEDINGS OF THE ISTATIOlsrAL MUSEUM vol. 73 



Spiral lines not greenish or bronzy. 



Spiral lines broad, yellow cingulatus. 



Spiral lines not yellow. 



Spiral lines reduced to mere indication of dark lines on 



base eburneus. 



Shell not of pure white, ivory white, or whitish ground color. 

 Ground color yellow to orange or greenish yellow or ashy. 



Double row of brown spots present at the suture-_pseudopictus. 



Double row of brown spots not present at the suture luteus. 



Ground color not yellow to orange or greenish yellow or ashy. 

 Ground color dark with yellowish axial markins marmoratns. 



DESCRIPTION OF GENERA AND SPECIES 



Genus LIGUUS Montfort 



All material referred to which was obtained by others or which has been seen 

 in other collections is duly credited ; the rest was collected by the author. I 

 have not given synonymy partly because I do not have access to the necessary 

 literature. 



Shell imperforate, oblong to ovate-conic, with simple, usually 

 thin, unexpanded lip and obtuse, vertically wrinkled or smooth 

 nepionic whorls which are more or less rounded; columella straight 

 or twisted-truncate at base ; color white, yellow, brown, orange, green, 

 or bronzy. 



LIGUUS SOLIDUS Say 



Plate 1, fig. 1 



1825. Achatina solida Say, Joum. Acad. Sci. Philadelphia, vol. 5, p. 122. 



Shell thin to solid, generally elongated, usually with rather flat- 

 tened whorls: color white, cream, or yellow, sometimes variously 

 painted; brilliantly polished and generally having a decidedly por- 

 cellanous texture ; axial region white, pink, or purplish. 



Western part of Cuba; Lower Florida Keys; central islands of 

 the Upper Florida Keys. 



The only character by which this species can always be separated 

 from fasciatus and crenatus is the brilliant porcellanous texture of 

 the shell, and certain specimens of pseudopictus are somewhat want- 

 ing in this, being almost glassy. Usually the color does not become 

 darker toward the lip, but in a few soUdulus which I have obtained 

 on Stock Island near Key West it does. And some of these have 

 narrow, spiral, bronzy lines on the last whorl exactly after the man- 

 ner of certain forms of crenatus. Yet I believe that it should stand 

 as a species distinct from crenatus and fasciatus^ as I have no doubt 

 that it represents a different line of development. 



