462 VARIATION AND ZOOGEOGRAPHY OF LIGUUS IN FLORIDA 



vertical and simple, not truncate in front view. There is much variation in th 

 degree of acceleration of the flame-pattern, the several successive sets of fla ^ 

 being crowded on some shells so that they can scarcely be distinguished wh'1 

 on others the breaks in the series may be a half-whorl long and are conspicuou 

 These variations are continuous. The development of dark varirpnl 



the regular mode of ornamentation of the ephebic stage is a somewhat 



streaks 



race 



feature of this subspecies, but occurs also in L. solidus graphicus and in the 

 of L. fasciatus castaneozonatus from Big Palo Alto Key. 



A notable discontinuous variation appears in 8 specimens (8 per cent of the 

 whole number collected by Mr. Moore), in which all brown or purplish flames and 

 bands are wanting, the shell retaining only the white and yellow ground-color 

 and green lines. The apex and columella are pink, as in all other specimens. 

 This variation — the absence of brown pattern, — occurs also in other races of 

 Liguus (PI. XXXVII, figs. 4c, 4d). 



Lriguus fasciatus lignumvitce is closely related by its color pattern to typical 

 fasciatus of Cuba, which differs by its much greater solidity and less convex 

 whorls. It is also related to L. solidus graphicus. It differs from the latter by 

 having invariably green spiral lines. I do not believe that the race is related 

 directly to any forms of the mainland or east Florida. It seems to be a descend- 

 ant of the Cuban fasciatus stock which also gave rise to L. solidus. It is entirely 

 different from the Liguus of the keys adjacent to Lignum Vitse, or from those of 

 the south-central group of keys. 



7. Race of the Southwestern Keys, Liguus solidus. 



Plate XXXVII, figs. 1, la, 16, 2, 2a. 



From Pine and No-Name Keys westward to Key West the forms of Liguus 

 differ so much from those of other Floridan localities that they may conveniently 

 be separated as a species under the name Liguus solidus (Say) . The shell is 

 solid, the surface having a porcellanous smoothness and gloss ; there are rmer 

 green, olive or yellowish spiral lines; and the broad yellow zones do not become 

 darker towards the lip, as they do when present in fasciatus. The patterns o 

 color are unlike those of fasciatus, and have more fundamental resemblance to 

 the patterns of the Cuban forms murreus and blainianus, which also lack gree 



lines. . w hich 



The area occupied by L. solidus does not overlap that of L. fasciatus, w 

 extends as far west as Key Vaca. The locality and collector o fth e typ 

 L. solidus were given by Say as "East Florida, T. R. Peale.' Inroug ; 

 kindness of Mr. S. N. Rhoads, who possesses Peale's MS. journal, l na 

 able to fix upon Key West as the type locality of L. solidus. bay 

 specimen is still preserved in the collection of the Academy. 



n Journal of the Academy of Natural Sciences, V, p. 122. . u ere he had 



« -D..-1 * xi- _ • x._ „r ioo,i _k :« ™^A n TPo^Ur in 1 895 he left St. Augustine, w 



winter of 1824-5 in Florid 



been 



The first stop was 



