40 
THE VOYAGE OF H.M.S. CHALLENGER. 
The species may be readily distinguished by the following features. The rostrum of 
Squilla lata is twice as long as wide, and it gradually tapers to the narrow rounded tip, 
while it is trigonal in Squilla fasciata, hardly longer than wide, with a broad tip. The 
lateral edges of the third and fourth thoracic somites are obliquely truncated in Squilla 
lata, and rounded in Squilla fasciata. The paddle of the exopodite of the sixth 
abdominal appendage of Squilla lata is as long, and that of Squilla fasciata half as long, 
as the second joint. The dorsal surface of the telson of Squilla lata is obscurely marked 
by curved lines, and the submedian posterior spines are curved at the tip and broad at 
the base, with no intermediate dentations ; while the dorsal surface in Squilla fasciata 
is marked by longitudinal car in*, and the submedian spines are acute with intermediate 
dentations. 
In addition to these more conspicuous points, the following minute differences serve to 
show the distinctness of the two forms : — 
The antennae are longer than in Squilla lata; the carapace is nearly transverse in 
front and deeply notched behind, while in Squilla lata it is subacute in front and nearly 
transverse behind. All the carinae of the abdominal somites, except the inner pair on 
the first, end in spines in Squilla fasciata, while in Squilla lata only those on the sixth 
somite end in spines, and there is no dorsal spine on the basal joint of the sixth abdominal 
appendage, while there is an acute spine in Squilla fasciata. 
The following measurements in thousandths of the total, length also exhibit the 
difference between the two. 
Squilla 
chlorida. 
Squilla 
lata. 
Squilla 
fasciata. 
Length of rostrum, 
24 
47 
42 
Length of carapace, ....... 
196 
205 
231 
Length of hind body, ....... 
781 
749 
726 
Width of third thoracic somite, ...... 
168 
166 
161 
Width of fifth abdominal somite, . . . . 
264 
251 
278 
Length of first antenna, measured from tip of rostrum, 
288 
287 
401 
Length of flagellum of second antenna, ..... 
232 
239 
227 
Length of scale of second antenna, . . 
96 
112 
170 
Squilla chlorida, n. sp. (PI. II. figs. 1-5). 
1 Clorida decor ata, Wood-Mason, J. Proc. Asiatic Soc., Bengal, Dec. 1875. On some new species 
of Stomatopoda Crustacea, Ann. and Mag. Nat. Hist., ser. 4, vol. xvii., 1876, p. 263. 
1 Chloridella decorata, Miers, E. J., On the Squillidae, Ann. and Mag. Nat. Hist., ser. 5, 
vol. v. p. 15, 1880. 
Diagnosis. — Eyes .directed forward, with basal portion swollen, and a little 
wider than corneal portion. Appendages of thoracic limbs strap-shaped. Five teeth on 
