1913. | S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. IgI 
24. Gonodactylus spinosissimus, Pfeffer. 
Platerxe fies. 124), ¥25: 
1888. Gonodactylus spinosissimus, Pfeffer, Mitth. naturh. Mus. Hamburg, VI, 4, p. 35. 
1894. Gonodactylus spinosissimus, Bigelow, Proc. U.S. Nat. Mus., XVII, p. 493. 
1906. Gonodactylus spinosissimus, Nobili, Ann. Sci. Nat. Zool. (9), IV, p. 326. 
1906. Protosquilla spinosissima, Tattersall, Ceylon Pearl Oyster Rep., V, p. 173, pl. ii, fig. 19. 
The carapace is widest posteriorly and is a little longer than its greatest breadth. 
Its posterior margin and the anterior edges on either side of the rostral base are con- 
cave. The antero-lateral angles are subacute. The rostrum is sharply trispinous ; 
the median spine is more than three times as long as the proximal undivided part and 
extends to the cornea of the eyes ; the outer spines are much shorter and reach a little 
beyond the base of the stalk. 
The dorsal processes of the ophthalmic somite are clearly visible between the 
rostral spines and resemble those of G. pulchellus, their acute antero-lateral angles ex- 
tending outwards almost to the external margin of the eyestalk. The eyes are flat- 
tened ; the cornea is wider than the stalk, distinctly bilobed, and the corneal and 
peduncular axes are a little oblique. 
The mandibular palp is composed of two segments. The basal part of the raptorial 
dactylus is very strongly swollen and its external margin is feebly notched proximally. 
The lateral margins of the sixth and seventh thoracic somites are truncately 
rounded, the former more broadly than the latter. Except for the customary antero- 
lateral carinae, the first four abdominal somites are smooth. ‘The postero-lateral angles 
of the first three are rounded, those of the fourth rounded or subacute, those of the fifth 
sharply spinous. The fifth somite is smooth in the middle, but bears three or four longi- 
tudinal carinae on either side separated by furrows. 
The sixth somite is fused with the telson.' It bears four large rounded tubercles, 
a pair of submedians and a pair of laterals, the former situated well in advance of the 
latter. All four tubercles are beset with long and slender spines and in addition there 
is a row of similar spines along the anterior and lateral margins and numerous others 
in the vicinity of the lateral tubercles. 
The telson excluding the spines on the edges is almost as broad as long. The 
lateral margins are only very slightly convex. The wide and deep median distal 
emargination is conspicuous, and the apices on either side arejcomposed of two subequal 
lobes separated by a wide notch. ‘The inner of these lobes is narrower than the outer 
and terminates in a stout spine with a movable spinule on its inner aspect. On the 
dorsal surface there are three rounded bosses. The median is nearly circular, while 
the two forming the lateral pair are slightly oval and are situated much further back- 
wards. All three tubercles bear long and slender spines similar to those on the preced- 
ing segment, and in addition, others are found investing all the margins and the surface 
near thetubercles. Those situated between the tubercles and the spinous lateral margin 
are arranged on either side in two regular longitudinal rows. 
' More completely so than in any other species examined. 
