8o Memoirs of the Indian Museum. [Vor. IV, 
bifurcated anteriorly for only two-sevenths of its length in front of the cervi- 
cal groove ; the distance between the small mid-dorsal pit and the base of 
the fork is more than half the length of the bifurcated part and is far greater 
than in typical examples. 
2. The rostrum is proportionately broader and its apex is more rounded anteriorly. 
3. The corneal and peduncular axes of the eye seem to be a trifle less oblique and 
the corneal index, as might be expected in so large a specimen, is greater : 
a3: 
In other respects, however, the specimen agrees very closely with typical examples. 
As regards colour, spirit specimens are as a rule darker than those of the allied 
species but the general plan is closely similar. ‘The longitudinal grooves of the 
carapace, the lateral margins of the rostrum, and the posterior margins of the last 
three thoracic and first four abdominal somites are rather broadly marked with black 
pigment. The median carina of the carapace is also defined by similar pigment, but 
much less distinctly. The abdominal somites are rather thickly strewn with black 
chromatophores, which in most cases form decided patches along the inner aspect of 
each lateral carina. These patches are specially well-marked on the fifth somite and 
there is also in most cases, more particularly in young specimens, a pair of dark spots 
in the middle of the second somite. ‘The pits and carinae on the dorsal surface of the 
telson are defined by black pigment and the uropods are faintly suffused with the same 
colour. 
I have been unable to find any structural character which will account for the 
name which Wood-Mason chose for this species (see p. 19). 
There are thirty-five specimens of S. stvidulans in the Indian Museum :— 
meee Nellore Coast, Madras; 80—110fms., _‘ Investigator.’ 43,52, 69—I100 mm. 
14° 18’ 15” N., 80° 18’ 30” E. 
us’ Masulipatam Coast, Madras; 95 fms., ‘Investigator.’ 69, 41—92 mm. 
15° 56’ 29” N., 81° 26’ 10” E. 
“ Masulipatam Coast, Madras; 240 fms., ‘ Investigator.’ 292, 48 and 74 mm. 
15° 56’ 50” N., 81° 30’ 30” E. 
38-2 Orissa Coast; 68 fms. * Investigator.’ Ig,12,52 and 97 mm. 
. TYPES: 
“S—9 Orissa Coast; 68 fms. ‘ Investigator.’ 3¢,122, 38—86 mm. 
7685 Misaki, Japan. A. Owston. Id, 144 mm, 
Only the above specimens are known. 
29, Squilla investigatoris, Lloyd. 
Plate VI, figs. 67, 68. 
1907. Squilla investigatoris, Lloyd, Rec. Ind. Mus., I, p. ro. 
1908. Squilla investigatoris, Lloyd, Rec. Ind. Mus., II, p. 29, pls. ii and ili. 
This species is readily distinguished from its allies by the unusually large number 
of teeth on the dactylus of the raptorial claw. n other respects it bears a close resem- 
blance to the species of the preceding group. 
