THE NAUTILUS. 47 
shell both in sculpture and color. A _ perfect shell of the 
smooth or more typical form shows interesting phases in sculp- 
ture in the early growth of the shell, the protoconch and about 
half a whorl of the young shell being smooth, followed by 
about half a whorl with only longitudinal ridges; this is fol- 
lowed by two whorls with prominent spiral ridges which gradu- 
ally become obsolete or wanting except near the suture, these 
subsutural ridges increasing in prominence and often becoming 
crenulated or beaded on the last two whorls. On the anterior 
portion of the shel] are also prominent spiral ridges. Some of 
the specimens from the Bahamas have a decided shoulder on 
the body whorl. Color whitish, mottled with brown or reddish 
blotches and with from 26-33 dark-brown spiral lines on the 
body whorl. Two specimens from the West Indies are uni- 
formiy light brown with the usual dark-brown spiral lines. 
Simpson says: ‘‘A mahogany-colored form is occasionally 
found on the Keys.” It varies in length from 5 to 8 inches 
(125 to 200 mm.) and is found from North Carolina to the 
West Indies and Venezuela. 
The varietal name of obsoleta was applied to a smooth form 
from St. Thomas, but this cannot really be separated. There 
is, however, a form in which the spiral grooves and ridges cover 
the entire shell. Tryon (Manual III, 74) says: ‘‘I figure a 
rugose form which Dunker intended at one time to describe as 
F.*scheepmakert but finally illustrated in his ‘ Novitates’ as a 
variety of F. tulipa.’’ This name might therefore be used in a 
varietal sense for this form which is quite common on the Gulf 
coast of Florida. 
Fasciolaria distans Lamarck. 
As pointed out by Dr. Dall and others, this is a good species 
and not a variety of F. tulipa Linn., as stated by Tryon and 
later by Miss Rogers in the ‘‘Shell Book.’’ It is smaller and 
smoother, having only faint spiral sulcations on two of the 
early whorls near the nucleus, and spiral ridges on the narrow 
anterior portion. ‘There is also present an internal ridge on the 
body whorl in front of the suture. Color whitish, with bluish- 
gray or brown blotches and usually with five or six equidistant, 
