30 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 73 



acters of fasoiatus and in fact of the genus. It has become obliter- 

 ated in all the forms of crenatus save tna^inoratus, in ornatus, in 

 typical solidiis, soUdulvs, crassus, s-mipsoni, and nearly so in delioatus. 

 The axial region in forms of fasciatus may be pink or purplish at 

 the tip of the spire and white at the base or the opposite, but there is 

 always more or less color to it, while that of crenatus in all its forms 

 is pure white. This may seem like a trivial character on which to 

 found a species, but it is the only constant one, and with Pilsbry 

 I believe it is one of long standing, the color having faded from the 

 forms with white axis a long time ago. 



LIGUUS FASCIATUS CASTANEOZONATUS Pilsbry 



Plate 1, fig. 12 



1912. Jjiguus fasciatus castaneosonatus Pilsbey, Jouru. Acad. Nat. Sci. Phila- 

 delphia, ser. 2, vol. 15, p. 460, pi. 39, figs. 23, 23 a. 



Shell rather solid, with moderately rounded whorls; axial region 

 pink to deep purple ; surface with a white ground ; third whorl with 

 faint, irregular axial or zigzag brown striations or blotches which 

 become darker and closer until at about the fifth or sixth whorl they 

 form a broad, more or less solid chestnut or black spiral band. There 

 is a similar basal band and usually a narrow reddish brown periph- 

 eral line and all three extend to the aperture. 



Length 43, diameter 24 nmi.; length of a large shell from Key 

 Largo 60, diameter 30 mm. 



Key Vaca group; Upper Matccumbe Key northeast along the 

 chain to Elliotts Key and on several of the small adjacent islands; 

 Middle and East Cape Sable; Chokoloskee; the south shore of the 

 mainland as far east as Madeira Bay ; the rocky ridge of the lower 

 east coast from Miami southwest to Long Pine Key in the 

 Everglades ; Pinecrest. 



A striking and beautiful Lig^ius which is very abundant and 

 widely distributed, occupying nearly all the region in Florida in- 

 habited by the species to which it belongs. It is apparently want- 

 ing from Miami northward; on the w^est coast above Chokoloskee 

 and on a few of the middle keys of the upper chain. At Miami it 

 may hybridize with other forms. A Liguus occurs in Cuba of which 

 I have a specimen from Salto Manantiales which is extremely close 

 to this, and I have shells f rom Andros de Cisneros labeled " Isla de 

 Cuba " very near our subspecies. It is quite possible that castaneo- 

 zonatus or its prototype may have sprung from hlcdneanus^ a Cuban 

 form now confined within narrow limits. In some Floridian shells 

 the dark band is more or less broken up, while in others it is nearly 

 continuous. 



