48 
T. Y. HODGSON. 
distal joint more than half the length, angular clistally, and provided with a large 
number of thick setae ; the inner edge of this joint bears a group of fine setae, of which 
two are larger and stronger than the rest, and both are thickened so as to form a broad 
wall rather than a narrow edge ; this more particularly is the case with the basal joint. 
The palp is five-jointed and large; the first three joints progressively increase in 
length ; the remainder decrease, but in no case is the difference great. Both the third 
and fourth are enormously expanded internally, each as a flattened plate with more or 
less rounded angles. The fifth joint is stout, but digitiform, almost surrounded with 
setae, which increase in length to the distal extremity. The first joint only bears a 
few short setae ; the second, third, and fourth are richly setose internally, the third 
and fourth bearing short setae externally as well. The epignath is a broad plate about 
the length of the basal joint. 
The first three appendages of the mesosome are prehensile in function and exactly 
alike except in so far that they increase in size from the first to the third; the 
remaining four are ambulatory, exactly alike, and also increase in length from the 
fourth to the seventh. 
The first appendage (PI. VII., fig. 5) has a long basis, nearly as long as the four 
following joints, and carries a small tuft of spinous setae ventrally at its distal 
extremity. The ischium is about half as long, and has two tufts of spinous setse 
ventrally ; it has a small external process which extends the articular surface. The 
merus is a very short joint with a large dorsal expansion which partially covers the 
succeeding joint and extends beyond the insertion of the propodus. This expansion 
terminates in a tuft of spinous setse, and the ventral aspect of the joint, here very 
short, bears two groups of similar setse on the inner side, and only one, which is 
smaller, on the other. The carpus is short and broadens dorsally, where it is very 
largely covered by the preceding joint; ventrally it carries three double series of stout 
setse. The propodus is broad, rounded dorsally, nearly as long as the three preceding- 
joints ; the ventral margin appears as if serrated, and bears seven double groups of 
stiff setse. A few short setse occur dorsally at the distal extremity ; the dactylus is 
slender, the point reaching as far as the carpus. 
In the last appendage of the mesosome the proportions of the joints are 15. 9. 6. 
12. 12. G. The basis has the external articular process well developed, beyond which 
it is constricted ; a flange runs along the ventral surface of this joint, to open out 
midway along it to form a protective shield for the base of the next joint. There is a 
small distal fringe dorsally. The ischium and succeeding joints are triangular in section, 
being flat ventrally. The dorsal ridge produced by this shape opens out on this joint 
to permit the more complete flexure of the succeeding joint and is armed with three 
groups of spinous setae, five groups of such setae occur ventrally. The merus has three 
and projects dorsally over the base of the carpus ; the carpus has seven such groups and 
a distal fringe ; the propodus has five, which more nearly approach transverse bands ; 
there is also a short distal fringe dorsally. The propodus is long and slender. 
