178 Memoirs of the Indian Museum. [Vo.. IV, 
on either side defining the lateral and antero-lateral margins, and on the second, third 
and fourth there are two broad and shallow lateral depressions between the thickened 
lateral edge and the feeble ridge that limits the smooth central portion of the somite. 
These two depressions are separated by a longitudinal elevation which is itself furrowed 
This sculpture is inconspicuous, but may be seen without much difficulty in speci- 
mens of good size, especially after the removal of all surface moisture. The fifth somite 
is strongly puckered and wrinkled laterally. ‘The postero-lateral angles of all four 
somites are subacute, but not spinous. 
The sixth abdominal somite is almost immovably articulated with the telson and 
the middle of its posterior margin is concave in dorsal view. It bears six oval bosses 
in a transverse row and the outermost, which is the longest (more a ridge than a boss), 
trends outwards to meet the external margin in a small postero-lateral spine. In most 
perfect specimens these elevations are clothed with short setae; the interspaces be- 
tween them are coarsely and irregularly punctate. 
The general form of the telson is shown in fig. 118. The median of the three dorsal 
bosses or elevations is somewhat triangular in shape while the submedians, which, though 
longer, reach only to about the middle of the telson, are more or less pyriform. The 
lateral margins of the telson and the surfaces of all three elevations are usually beset 
with short setae similar to those on the last abdominal somite, elsewhere the surface 
is coarsely reticulate. The distal margin is divided by seven fissures, cut right through 
the telson, into eight lobes. ‘These fissures ' are exceedingly narrow ; they are widest 
proximally, but distally their margins are usually in contact. The median incision 
extends almost to the base of the central elevation ; those on either side reach about 
half way to the lateral elevations. Each distal lobe of the telson comprises an outer 
subacute portion and an inner movable denticle. In addition there are numerous 
denticles on the margins of the median incision, and on the convex inner edges of the 
submedian lobes. 
The process from the base of the uropods consists of two sharp teeth: the inner 
at least half the length of the outer. The two segments forming the exopod articulate 
normally with one another; the innermost bears nine movable spines on its external 
margin. ‘he margins of the distal segment and of the endopod are uniformly beset 
with setae. 
Miers regarded this form merely as a variety of G. trispinosus, and in this he has 
been followed by most subsequent writers ; but, although I have not been able to com- 
pare the two, there is, I believe, little doubt that G. pulchellus is entitled to rank as a 
distinct species. 
The colouring of fresh specimens is rather striking. The general tone is pale oliva- 
ceous brown due to a profuse marbling of warm olive brown on a pale ground. The 
whole surface is in addition sprinkled with very small black chromatophores. On the 
carapace there are faint indications of anterior and post-median dark transverse bands, 
while, on the post-abdomen, two pairs of dark spots on the sixth thoracic, and a dark 
median patch on the first abdominal somite are generally conspicuous. Median patches 
1 The fissures are best seen if the telson is examined from below. 
