1913. | S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. II9 
The lateral margins of the fifth thoracic somite are greatly compressed antero- 
posteriorly and form a thin outstanding blade which, in dorsal view, looks like a spine. 
The sixth and seventh somites are rounded antero-laterally, while their postero-lateral 
angles are almost rectangular. The basal segment of the last three thoracic limbs bears 
a short stout tooth on its external aspect. The first five abdominal somites are dorsally 
smooth and their postero-lateral angles do not project backwards as spines. The sixth 
somite possesses a shallow longitudinal groove on either side and its postero-lateral 
angles are sharply spinous. 
The telson is semicircular in shape and is more than twice as broad as long. On its 
dorsal surface near the distal margin it is provided with a transverse series of three 
short but acute spines ; the two lateral form the terminations of carinae, while the 
median is situated at the end of a rather conspicuous lobe. The submedian, intermediate 
and lateral marginal spines are well developed. The submedians are movable and the 
edge between them, which is slightly emarginate, bears four to seven minute denticles. 
There are two spines, the outermost of which is the largest, between the submedians 
and intermediates, and one between the intermediate and the lateral. The ventral 
surface of the telson is smooth. 
The basal segment of the uropod bears a single dorsal spine on its distal margin, 
projecting over the articulation of the inner segment of the exopod. ‘The outer spine 
of the bifurcate process (fig. 94) is enormously larger than the inner ; it is broad, very 
greatly expanded laterally, and is deeply keeled ventrally. The inner spine of the 
process is, in the type specimen, represented merely by a small rounded lobe ; it is 
larger and sharply spinous in an example from New Zealand. In addition, there is 
another small ventral spine at the inner distal angle of the basal segment which pro- 
jects over the base of the inner uropod. ‘The proximal segment of the exopod bears 
a single spine ventrally and distally and a series of five or six, which are movable, along 
its outer margin. Of these spines the two outermost are long and recurved. 
Chilton (1891, p. 66) has given an account of the adult colouration. There is, it 
appears, a very great difference in this respect between the two sexes, for the male is 
greyish in general tone, while the carapace of the female is similar, but darker, and the 
whole of the central part of the abdominal segments is coloured a bright red. Tan- 
chester (Ig0I) notes that the small specimens which he examined were suffused with 
rosy red and sprinkled with red and black spots, the latter forming two conspicuous 
black marks over the submedian marginal spines of the telson. From these two accounts 
it is clear that the transverse bars of blue pigment that characterize the majority of the 
species of Lyszosquilla are entirely absent in L. spinosa. No trace of the original colour 
remains in the case of the two specimens preserved in the Indian Museum. 
For the elucidation of the synonymy of this species we are indebted to Chilton 
who has been able to examine the type specimens of S. daevis, S. indefensa and S. tri- 
dentata. ‘The latter species was described from a specimen °75 inches in length and 
it possesses only four teeth on the dactylus of the raptorial claw. It is probable, as 
Chilton remarks, that it is a young individual, but nevertheless, on the assumption that 
it is to be referred to L. spinosa, it is not very easy to account for the small number of 
