1913.] S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. 25 
ridge running close to the inner edge of the gastric groove, the only carina on the cara- 
pace is a short portion of the marginal. It is invisible anteriorly, but defines the 
posterior edge on either side and is curved internally, extending forwards for a short 
distance on the surface of the carapace. The sharp teeth at the antero-lateral angles, 
owing to the strong convexity of the anterior margin, fail to reach the level of the 
rostral base. 
The rostrum is smooth above and at the base fully twice as broad as its median 
length. The lateral margins are usually a trifle upturned and converge rapidly to a 
broad, rounded apex. 
The eyes (fig. 3) are very broadly pyriform, little more than one and a half times 
as long as broad, and do not nearly reach to half the length of the basal segment of the 
antennular peduncle. ‘The very small bilobed cornea is only about half the width of 
the greatly swollen median portion of the stalk. The inner margins of the stalk are 
straight, flat, and in close juxtaposition for three-quarters of their basal length ; the 
external margins are feebly keeled. 
The antennular peduncle is as long as, or a trifle longer than, the carapace. ‘The 
two basal segments of the antennal endopodite are very long and reach as far as the 
apex of the scale. 
The mandibular palp is composed of three segments. 
The outer inferior margin of the merus of the raptorial claw is bluntly rounded 
distally. The dorsal carina of the carpus is sharp and entire, but terminates abruptly 
before reaching the distal edge. Externally the carpus is grooved and obscurely 
ridged. The propodus has three proximal movable spines, the second being the 
shortest, and a series of fine pectinations along the margin opposed to the dactylus. 
The dactylus bears four or five teeth including the terminal one, the fifth or proximal 
tooth, when present, is usually small' and lies close up against the next of the series. 
The outer margin of the dactylus is strongly convex and bears a rounded prominence 
at its base. 
The last three thoracic somites bear intermediate carinae ; submedian carinae may 
also be found, but as a rule are very obscure or wholly absent on all the somites except 
the last. The fifth somite is produced laterally to a short and sharp point directed 
almost transversely outwards (fig. 4) ; the pair of spines found on the inferior surface 
in certain allied species is obsolescent or entirely missing. The lateral margins of the 
sixth and seventh somites are slightly upturned and truncately rounded ; those of the 
eighth project anteriorly in the form of a small acute or subacute lobe. 
The abdominal somites are greatly depressed. ‘The first five bear four pairs of 
longitudinal carinae of which the submedian and intermediate, though always clearly 
visible, are faintly marked. All the somites, except the first and last, bear a small 
transversely-grooved tubercle in the middle line. The six carinae of the sixth somite 
are strongly swollen in the adult male and, in both sexes, the submedians are slightly 
' The dactylus of a male specimen figured by Wood-Mason (1895, pl. iv, fig. 9) is quite abnormal 
in the extreme reduction of ¢wo proximal teeth. 
