48 T. V. IIODOSON. 



distnl joint more thnu half the length, angnlnr distally, and provitlcd witli a large 

 numlter of thick sctso ; the iiiucr edge of this joint bears a group of fine seta;, of which 

 two arc larger and stronger than the rest, and Ijoth 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 diH'crence groat. Both the third 

 and fourth are enormously e.xpaiided internally, each as a Hattened plat^- 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 mcsosomo are preliensilc in function and exactly 

 alike excei)t in so far that they increase in size from tlie 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 

 followin<»^ joints, and carries a small tuft of spinous setsv ventrally at its distal 

 extremity. The ischium is about half as long, and has two tufts of spinous setae 

 ventrallv ; it has a small external process which extends the articular surface. The 

 moras 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 setae, and the ventral aspect of the joint, here very 

 short, bears two groups of similar setaj 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 

 setae. The {)ropodus 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 

 stirt" setae. A few short setae 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. 1). 6. 

 12. 1-. 0. The ba.sis has the external articular process well developed, beyond which 

 it is constricted ; a Hange 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 dorsalh-. The isihiuni 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 

 froups 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 sliort distal fringe dorsally. The propodus is long and slender. 



