142 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
The carapace is glabrous and punctate. The left cheliped is much the larger. The propodus of the 
second ambulatory leg of the left side is wider than those of the other legs and lias the sulcus which 
suggested the name. This pretty little pagurid is the only representative of the genus accredited to 
the West Indian region. It prefers shells with the more circular apertures, as do many of the pagurids 
with hands so different in size. The color of the eye-stalks is an orange red, becoming white at the 
cornea; carapace a rich red, with white punctee. The chelipeds are red, often tinged with purple. 
Ensenada Honda, Culebra; Caballo Blanco Reef, Vieques; Arroyo; Ponce. 
Genus CLIBANARIUS. 
Clibanarius tricolor (Gibbes). Plate 6, fig. 2. 
Pat/unus tricolor Gibbes, Proe. American Assoc., 1850, m, p. 189. 
Clibanarius tricolor Stimpson, Proc. Acad. Nat. Sci. Phila. 1858, p. 234. 
This little Clibanarius is unique among the members of the genus inhabiting the region in having 
the legs conspicuously banded with color rather than longitudinally striped, a character that is so 
nearly generic. It is found in some localities in great numbers, living in the shells of Cerithium of 
various species and other small gastropods. The orange bands at the proximal ends of the articles of 
the ambulatory feet remain in the alcoholic specimens, but the “black spots” on the carapace are not 
present. Gibbes does not mention the single orange stripe on the eve-stalk. 
From Ponce and San Juan. 
Clibanarius antillensis Stimpson. Plate 6, fig. 1. 
Clibanarius antillensis Stimpson, Ann. Lyc. Nat. Hist, of New York, vn, p. 85; part published March, 1859. 
The frontal margin is nearly straight, broken only by a very small rostral point; from the angle 
behind the antenna to the side of the carapace the margin is straight. The length of the eyes is equal 
to the width of the carapace; the eye scales are short, broad, and truncate, and armed with three or 
four spinules on the terminal margin. The carapace is elongated, is widest at the anterior third, and 
is deeply punctate. The chelipeds are armed with numerous sharp conical spines. As occurs in some 
species of other genera, the propodus and dactyl of the exposed second left ambulatory leg are much 
wider than the corresponding parts of the right side. On the side of the merus are two white stripes; 
a single stripe of the same color runs from the merus to the tip of the dactyl; the chelipeds are 
reddish, with white spines. A small species, averaging but little larger than the preceding. 
Mayaguez; Ponce; Boqueron Bay; Ensenada Honda, Culebra; Arroyo. 
Clibanarius sclopetarius (Herbst). 
Cancer sclopetarius Herbst, Krabben und Krebse, n, p. 23, pi. xxm, fig. 3. 
Pagurus tuberculosus H. M. Edwards, Ann. des Sci. Nat. (2), vi, p. 278, pi. xm,fig. 1; also Hist. Nat. des Crust., ii, p.229. 
Clibanarius sclopetarius Stimpson, Proe. Acad. Nat. Sci. Phila., p.235, 1858; also in Ann. Nat. Hist. N. Y., vn, p. 85, part pub- 
lished 1859. 
Pagurus cubensis Saussure, Crust. Nov. du Mexique et des Antilles, p. 39, 1858. 
Clibanarius formosus J. E. Ives, Proc. Acad. Nat. Sci. Phila. 1891, p. 182, pi. v, figs. 1-2. 
From Ensenada Honda, Culebra, there is a specimen of this species which comes under Ilerbst’s 
description. The eye-stalks have faded to an olive green; the stripes on the legs are a brownish purple; 
the spiny tubercles of the chelipeds are yet greenish; the ground color is reddish. Three other 
specimens from Culebra are the same in form, but differ in color — the strijies are a bright crimson; in 
one specimen the eye-stalks are crimson; in another specimen one eye-stalk is crimson at the base 
and a very light flesh-color tinged with green near the cornea. From Jamaica a number of specimens 
come well under H. Milne Edwards’s description of C. tuberculosus. The color is reddish, with yellow 
stripes on the legs. 
The variation in color is wide; it may be possible, with an abundance of fresh material from many 
localities, to separate this species into subspecies. The variations i;i form are slight and do not hold 
uniformly in specimens from one locality and color. The variation in the length of the eye-stalk is as 
great as in any part. Among a number of specimens from Jamaica is one with eye-stalks very nearly 
equal to the length of the anterior portion of the carapace, measuring the eye-stalk from the front to 
the extremity of the cornea; in other specimens taken at the same time the eye-stalks are much shorter. 
Ensenada Honda, Culebra; San Juan. 
