70 IOWA STUDIES IN NATURAL HISTORY 
19, figures 3c and 3b, and plate 21, figure 6, show a tapering 
movable finger, while figures 3a, and 3d, on plate 19 seem to 
have the movable finger terminally blunt and swollen. They 
are so in the specimens I have here, and recently elsewhere? 
referred to this species. 
Whether this difference is constant, and so of specifie or at 
least of varietal value, or possibly dimorphic, I am unable to 
say . Guérin’s figure of the movable finger, by the way, repro- 
duced by Verrill (pl. 25, figure 8), might be of either character. 
Coutiére’s specimen lacked the second legs; Verrill’s draw- 
ing (loc. cit., pl. 29, figs. 1 1’, 1 1’’ a) of one of the members 
of this pair agrees with the specimens before me, but the type 
of larger chela possessed by the specimen in question is not 
ascertainable from the text. As regards the legs of the third 
pair, in my specimens as in Verrill’s the merus carries below 
at the distal end a small spine, and such a spine is also present 
in Coutiére’s C. candet, which I have examined, though not de- 
tected by him, for he described the merus as unarmed. 
Crangon barbadensis, new species 
Off the Castle, E. side Barbados, 1-4 fathoms (type locality) ; 
2¢ 42 (2 ovig.). Off the Crane, Barbados, from old coral 
rock; 19. Pelican Island, Barbados, tide pool; two specimens. 
This species is one of a small group having the outer margin of the 
antennal scale armed with a more or less forwardly directed spine or 
spine-like process. The only other species, similarly armed, of which I 
am aware, are C. malleator (Dana) and C. belli Coutiéret from Fernando 
Noronha. The front, rostral carina and orbital depressions somewhat 
resemble C. cristulifrons (Rathbun) (below, p. 73), though the carina is 
faintly discernible for a greater distance behind the posteriorly sharply 
demarked, orbital depressions; the orbital hoods are unarmed, being an- 
teriorly rounded; the antennular peduncles are quite slender, the first 
joints are maybe one-third longer than the terminal ones, and the second 
about twice as long as the first, a little better than three times the third, 
and nearly four times as long as wide; in this respect our species differs 
markedly from C. belli, which is otherwise more nearly related possibly 
2Macruran, Anomuran and Stomatopod Crustacea collected at Curacao 
by Dr. C. J. van der Horst in 1920. Bijdragen tot de Dierkunde, Ams- 
terdam, XXIII (1924), p. 64. 
3 Dana, Crust. U. S. Expl. Exped., I (1852), p. 557; atlas, 1855, pl. 31, 
figs. 9a-h. Coutiére, Ann. Sci. Nat., Zool., Paris, (8), IX, p. 146, text 
fig. 140, p. 219, fig. 262. 
4 Bull. Soc. Ent. France, (1898), p. 149, text figs. 1, 1a. 
