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BULLETIN OF THE UNITED STATES FISH COMMISSION. 
additional elevations on the telson at the bases of the intermediate denticles, in front and a little 
on one side of the submedian central prominences, behind the median prominence, and along the 
margins of the submedian and intermediate spines, fig. 1. In front of the median prominence are 
two small pits on very slight elevations of the surface and there are two grooves on the sides of the 
central prominence near its posterior end. The first an ten me are fairly long, the second joints 
extending beyond the eyes. The second pair extend nearly as far forward as first. The antennarv 
scale slightly exceeds half the length of the carapace; the carapace is about one-fourth the length of 
the body. The appendages to the walking legs are linear. The basal prolongation of the uropod is 
broad and fiat, and the two spines are curved inward. There is no tooth on the margin of either 
spine. The distal segment of the exopodite is about half the length of the proximal one, which bears 
11 movable spines besides a small immovable terminal one. 
Color . — The coloring is very variable, both in shade and pattern, and is distinctly protective; 
varying from a mottled green and white to a nearly pure olive green. 
Size . — Length of full-grown specimens, about 5 cm. 
Geographical distribution . — This species is common in the tropical Atlantic from the West Indies 
to Brazil, and is the only form of Gonodactylus reported from this region. In the waters of Porto Rico 
the Fish Hawk collected a large number of specimens from various stations on the eastern, southern, 
and western coasts in depths varying from 21 fathoms, at station 6089, west of the island of Vieques, 
to a few feet, of water on coral reefs. The most numerous collections were made with tangle at station 
6092, north of Vieques, depth 16 fathoms, coral bottom, and by shore collecting in Ensenada Honda, 
island of Culebra. 
Life history . — The early larval stages of this species have been fully described and illustrated by 
Brooks (’92). The eggs are deposited in burrows excavated by the females in pieces of coral rock 
lying upon the sand flats. The larva hatches in an Enchthus form with very short eye-stalks and the 
sutures between the fifth and sixth and between the sixth and seventh abdominal somites undeveloped. 
The abdomen bears five pairs of appendages. The first molt occurs about sixty hours after hatching, 
and the second about a week later, when the larva passes into the typical form of the Gonerichthus. 
Before the second molt Brooks’s larvae remained near the bottom of the aquarium and fed upon the 
eggs of an unknown species of Nudibranch; but after the second molt they refused this food and 
swam at the surface. Suitable food for this stage not having been discovered, it was impossible to rear 
the lame further. Later stages were obtained, however, by collecting with the skimming net, and 
they are described in the memoir. 
Genus PSEUDOSQUILLA (Guerin) Dana. 
Diagnosis . — Stomatopoda with the sixth abdominal segment not fused to the telson; the hind 
body smooth, very convex, and narrow; the dactylus of the raptorial claw not dilated at the base and 
provided with not more than three lateral teeth; the submedian spines of the telson long and with 
movable tips; and not more than four intermediate denticles, usually one. 
Larval form . — We are indebted to Claus for the determination of the larval form of this genus, to 
which Brooks (’86) has given the name Pseud erichthus. It may be recognized by the following charac- 
ters: Eyes stalked, appendages i-vii and xiv-xvii present in the earliest stages, hind body very long; 
telson longer than wide, sometimes ovate in general outline; carapace narrow, at least twice as long as 
wide, short, without prominent ventro-lateral angles, short rostrum, and posterior lateral spines short, 
usually only one-fourtli or one-third as long as the carapace, and placed near the dorsal median line. 
Pseudosquilla ciliata Miers. (Figs. 3 and 4.) 
? Squilla ciliata, Fabrieius, Ent. Syst., n, p. 512, 1793. 
Squilla stylifera, Lamarck, Hist. Anim. sans Vert., v, p. 189, 1818. Latreille, Encyl. Moth., x, p. 472, 1825. 
Pseudosquilla stylifera, Dana, U. S. Expl. Exp., xm, Crustacea, I, p. 622, 1852. ? Von Martens, Arch. f. Naturg., xxxviii, 
p. 146, 1872. 
Pseudosquilla ciliata, Miers, Squillidee, Ann. and Mag. Nat. Hist., (5), v, p. 108, 1880. Brooks, Voyage of Challenger, xvi, p. 
53, 1886. Bigelow, Stomatopoda collected by the steamer Albatross, Proc. U. S. Nat. Mus., xvn, p. 499, 1894. Hansen, 
Isopoden, Cumaceen, und Stomatopoden, Engeb. Plank. Exp., n, G. c., p. 86, 1895. Rankin, Crustacea from the 
Bahamas, Ann. N. Y. Acad. Sci., xn, p. 253, 1898. 
Diagnosis . — A Pseudosquilla with cylindrical eyes; the dactylus of the raptorial claw slender with 
three teeth, including the terminal one; a smooth rostrum without spines or acute angles, wider than 
long; lateral margins of the exposed thoracic segments slightly produced, the first acute, the others 
more or less rounded, the second obliquely truncated, and the fourth notched; the first five abdominal 
