Type locality: Key Vaca, hammock along railroad, above Conch Town.
Holotype: FLMNH 241012.
Description: Liguus crenatus luteus Simpson 1920, PBSW, 33: p. 123.
A transcription of the original description follows.
Liguus crenatus luteus, n. subsp.
Shell variable in size, rather solid, inflated or elongated; apex and columellar region white, the rest of the surface pale yellow to orange, lighter colored on the earlier whorls, often with a greenish peripheral spiral line and occassionally a few other faint ones.
The type measures: Length, 63 mm.; diameter, 25 mm.
Another specimen measures: Length, 38 mm.; diamete, 18 mm.
The type specimen was collected on Key Vaca, above Conchtown.
The type is largely and richly colored. Others come from Long Key in the Lower Everglades north to Dania, Florida, and is abundant. The type is in the collection of the author. Paratypes Cat. No. 339094, U.S.N.M. (2 specimens). 
Holotype (courtesy of Pete Krull and the Jacksonville Club)
My take on Simpson's description and type follows.
"Liguus crenatus luteus, n. subsp."
I place luteus as a junior synonym of lossmanicus of the solidus group of the solidus subspecies. The varieties of this group have a white tip and parietal, and are unzonated and unvariegated.
"Shell variable in size, rather solid, inflated or elongated; apex and columellar region white, the rest of the surface pale yellow to orange, lighter colored on the earlier whorls, often with a greenish peripheral spiral line and occasionally a few other faint ones."
Simpson's described coloration can also be taken to include the continuous range of color intensity between the lossmanicus of Pilsbry, the luteus of Simpson and the auranteus of Clench. The type of luteus has faded considerably and has lost most of its yellow to orange coloration. In terms of shape, an adult Key Vaca shell is typically more elongate than the type of luteus. Green cuticular lines may be present.
The types of both solidus and luteus are Key Vaca shells. The solidus of Key Vaca, while similar to luteus in its range of color, has several distinct differences. The typical solidus is larger and more elongate. Simpson's type of luteus is atypical in this respect. The basic pattern of indistinct color bands that characterize shells of the subspecies solidus, is weakly expressed on the type of luteus as well as solidus, usually only as a single pale indistinct peripheral band, though some darker shells have a suggestion of multiple banding. Generally,the appearance is that of an elongate shell with an evenly colored yellow-orange color. These features vary little, suggesting a founder event that produced a genetically bottlenecked and isolated population. 





Key Vaca
The type is a very light and convex shell, probably the result of development in a hammock near carrying capacity. The shell at the upper left, collected over fifty years ago, comes close to the type of luteus in most respects, including significant fading. Shells collected in more recent times are typically heavier and more elongate, probably as a result of less competition for food in an environment with fewer snails.
I place all the above as solidus.
