BARBADOS-ANTIGUA REPORTS 77 
Crangon verrilli, new species 
Alpheus armillatus or Crangon armillatus Verrill, Trans. Conn. Acad. Sci., 
XXVI (1922), p. 76, pl. 48, figs. 2-2n (part: specimen referred to 
on page 76, as armillatus var., ‘‘No. 735-b’’). 
Barbados, in dead Strombus shells, May 29; 2 (1 ovig.) ; the 
ovigerous female is the type. 
A species closely related to the preceding, but distinctive enough to be 
readily recognized. The rostrum in both species has the form of a sharp 
crest, which in C. armillatus widens abruptly behind into a flattened tri- 
angular area, which may be a little undercut at the sides, but anteriorly 
is continuous with and about on the level with the rostral crest; in 
C. verrilli behind the rostral crest there is an abrupt inverted flattened 
U-shaped area deeply undercut at the sides, and anteriorly except just 
where it is joined by the rostral crest, this in profile is quite concave 
longitudinally, and lies noticeably below the level of the U-shaped area; 
on either side between the rostral crest and the orbital hoods are well 
marked orbital depressions distinctly limited behind by the A area in 
A. armillatus and the N-shaped area in C. verrilli. In the former the 
rostrum appears to run forward only about half the length of the visible 
portion of the basal antennular segment, in the latter about or nearly 
to the end of that segment. 
The antennules and antennular scales are about the same in both 
species; the blade of the antennal scale seems to be slightly narrower in 
C. verrillt and the basal antennal spine a little longer. 
The hands of the first legs, though very similar, are a little differently 
proportioned in the two species: measured on the outer face along the 
median longitudinal axis. The portion of the hand lying before the line 
connecting the notches in the upper and lower margins of the hands is 
just about as long as the posterior moiety; in C. armillatus the posterior 
portion is but about two-thirds as long as the anterior portion. The 
smaller hand in C. verrilli is three times, or a little more, as long as the 
greatest width of the palm; in C. armillatus the length is from two and 
two-thirds to not exceeding two and three-fourths the greatest width. 
The carpal joints of the second legs appear to have about the same 
relative length in both species; the joints diminish as follows: First, 
second, fifth, fourth, third; the first is as long as the second and third 
together, the second is from two-thirds to three-fourths the length of the 
first, the fourth appears a little longer than the third, the fifth is equal 
to the fourth and nearly half the third together. 
The carapace and rostrum of the ovigerous female holotype measure 
15 mm. in length, the abdomen and telson 25, and the telson 5 mm. long; 
the larger chela is 16 mm. long and 6.5 mm. wide. 
Crangon bahamensis (Rankin) 
Alpheus hippothoé var. bahamensis Rankin, Ann. N. Y. Acad. Sci., XI, 
no. 12 (1898), p. 247, pl. 20, fig. 5. 
