VARIATION AND ZOOGEOGRAPHY OF LIGUUS IN FLORIDA. 449 



The ground-color is white, faintly pink t inted. The early whorls, columella, a smell 

 part of the base adjacent, and the parietal callus are imwiably r<m colored There 

 is a line of pale brown or pink below t)\e suture, and a yellow or pink band at the 

 periphery (usually not well developed before the ephebic stage in (ioodland 

 Point shells, and sometimes delayed until the gerontic). As the pink of the 

 early whorls fades out, on the fourth or fifth whorl it i> replaced by a wide spiral 

 band, pinkish at first, but changing to yellow, and separated from the sutures by 

 narrower white bands. In som< shells the yellow band are exc i\ ly faint 

 On the last whorl another similar yellow band on the base beetnn- visible 

 The last whorl, or its last half, usually shows few or numerous yellowish-olive 

 or gre nish lines, one group above the periphery, another on the base. The 

 columella is usually slender, convex or straight, and continuous with the basal 

 lip below, but sometimes it is strongly truncate. The first ei hryooto whorl 



is generally lost in adult shells. 



The italics above denote characters common to this subspecies wherever 

 found. The yellow bands and greenish lines are inconstant. Greenish lines 

 are only weakly developed in West Florida roseatus, and are often lost by fading 

 and loss of the cuticle in living shells. The mutilated apex is a feature of some 

 colonies only. 



Length 52 mm. ; diam. 27 mm. ; length of aperture _ t mm 

 Length 50 mm.; diam. 25 mm.; length of aperture 23 mm 

 Length 56 mm.; diam. 28 mm.; length of aperture 25 nun 



% 



108 specimens examined from Goodland Point. Specimens precisely similar 

 to those taken by Mr. Moore in 1906 were collected by Henry Hemphill at 

 Goodland Point in 1883. The same form was found, a few dead shells only, on 

 the Georgia Fruit Company's land. Also living, at Caximbas, Key Marco, 

 1906 (where the largest of 49 collected is 60 mm. long). 



Horr's Island, near Key Marco, at Blue Hill, a hammock tract. The shells 

 are somewhat heavier and attained larger size, adults 53 to 63 mm. long, but are 

 similar in coloration to those of Goodland Point in a series of 20 taken in 1904 

 and 1907. Similar shells were taken by Mr. Moore in February, 1907, at the 

 north end of Horr's Island, 21 living specimens. 



Gomez Old Place, a key southeast of Goodland Point, 48 living specimens, 

 1906, similar to those of Goodland Point except in being smaller, 45 to 51 mm. 



long- . . . 



Russell's Key (PL XXXVIII, figs. 12, 12a, 126). A subvanety was found 



here differing in its greater solidity. There is no trace of yellow bands on the dtad- 



white surface at any stage of growth. Yellowish-olive lines are often present 



on the last half whorl. The subsutural and peripheral bands are bright pink and 



comparatively wide. The columella is of the heavy, straight, truncate type 



in all young and about 33 per cent of the adult shells, but non-truncate and 



29 JOURN. ACAD. NAT. SCI. PHILA.. VOL.XV. 



