1912.] S.Kemp & R.B.S.SEwELL: Notes on Decapoda, III. ar 
on the carapace and disappears before reaching the posterior 
third. The antero-inferior angle of the carapace is rectangular— 
not spinous (fig. 4). 
The abdominal terga are all smoothly rounded dorsally. 
The sixth somite is longer than the telson excluding its terminal 
setae and is more than twice the length of the fifth. The telson 
is a little shorter than the inner uropod; its apex is very narrow 
and is furnished with two pairs of spines the outer of which is 
more than twice the length of theinner. The upper surface of the 
telson is slightly flattened and is provided with two pairs of 
dorso-lateral spinules. There is no movable spine at the base of 
_ the uropods. 
The cornea of the eye is greatly expanded; it is much wider 
than the stalk and its breadth is fully a quarter the median 
length of the carapace. In the entire absence of an ocellus the 
species differs markedly from M. agulhasensts. 
The antennular peduncle reaches to about half the length 
of the antennal scale. The basal joint is long and bears a 
sharply-pointed lateral process which reaches nearly to its distal 
end; the second and third segments are very short and subequal. 
The antennal scale is distinctly shorter than the carapace. Its 
outer margin is slightly concave and terminates in a short spine 
which fails to reach the apex of the lamella. 
The mandible is provided with a large incisor process and 
a three-jointed palp. The basal segment of the latter is distinctly 
longer than the second (fig. 3). The first and second maxillipeds 
each possess an exopod and an epipod and the second maxilliped in 
addition bears a large podobranch. The third maxilliped also 
possesses both an exopod and an epipod, the former reaching to 
about half the length of the antepenultimate segment. 
The first peraeopod reaches almost to the end of the an- 
tennular peduncle; the carpus is about the same length as the chela 
and the fingers are less than half the length of the palm. On the 
internal surface of the carpus near its distal end is an excavated 
notch, margined with setae and having a stout spine at its 
proximal end. ‘The apparatus resembles a comb and is perhaps 
used for cleaning the antennae or other appendages (fig. 2). 
The second peraeopods reach beyond the end of the antennal 
scale by almost the whole length of the propodus. The carpus 
is composed of 14 or 15 segments, the ultimate of which is only 
a trifle shorter than the chela. 
The third peraeopod reaches beyond the apex of the scale by 
the length of the dactylus. At the distal end of the merus are two 
stout spines. The fourth peraeopod reaches only to the end of 
the antennular peduncle and is shorter than the fifth which reaches 
to the tip of the spine at the distal end of the antennal scale—on 
the distal half of the merus of these two last pairs there 
are a few large spines the number of which seems subject to 
considerable variation. The dactyli of the last three pairs bear 
from four to six strong spines. 
