I. '08. 40 



tehon {tig. 10) is about as long as the sixth somite, and is 

 shorter than both inner and outer uropods ; it is strongly sul- 

 cata dorsally, apically it is deeply forked and furnished, in the 

 bifurcation, with eight or nine pairs of spines, those at the 

 outer angles being the longest. 



The eyes are rather larger than in P. sivado, and with a 

 slightly shorter stalk. The basal joint of the antennular 

 peduncle is the longest, and the middle joint the shortest ; the 

 lateral process is sharply pointed, and reaches to the distal 

 end of the basal segment. The antennal scale (fig. 9) is rather 

 more than half the length of the carapace, its outer margin is 

 slightly convex and terminates apically in a long strong spine ; 

 the lamellar portion is rather less than four times as long as 

 broad. 



The outer maxillipedes do not quite reach to the apex of the 

 antennal scale ; the ultimate joint is about one and a third 

 times the length of the penultimate. The first pair of 

 pereiopods reaches beyond the tip of the antennal scale by one 

 half the length of the propodus. The basus and ischium are not 

 armed with ventral spines, but the former is produced distally 

 and basally to an acute point. The merus, which is rather 

 shorter than the propodus, is provided with ten to twelve ven- 

 tral spines; the carpus is very short, not much more than 

 one-fifth the length of the propodus. The fingers of the chela 

 are cuived near the tip and cross one another when closed ; 

 the dactylud is rather more than one-third the length of the 

 w^hole hand. The second pair of pereiopods reaches beyond the 

 first pair, the greater length being due to the longer merus 

 and f)ropodus. The basus is armed below with eight or nine 

 spines, and the ischium with two (fig. 11) ; the merus bears 

 along its basal edge about eighteen to twenty-five rather strong 

 spines, and the lower distal edge of the carpus is produced for- 

 wards to form a strong tooth. The palm of the chela is rather 

 stiongly contracted behind the fingers, and is but little longer 

 than them ; the digits are curved near their tips and cross one 

 another when closed. In both the first and second pairs the 

 fingers are provided with numerous stout spinules along their 

 inner faces. The third pair of pereiopods is extremely 

 slender, and reaches to the carpus of the second pair. The 

 dactylus and carpus ar-e very short ; the merus is very long, 

 being four times the length of the ischium and two and a 

 quarter times that of the propodus. The fourth pair is very 

 short and reaches only to about the middle of the merus of the 

 third pair; the propodus, which is slightly longer than the 

 ischium, is less than half the length of the merus ; the minute 

 dactylus bears a fringe of stiff setae. The fifth pair is almost 

 as long as the third and much stouter ; the ischium is equal 

 in length to the carpus and about one- third as long as the 

 merus ; the merus and propodus are about equal. The dac- 

 tylus is rather shorter than the carpus, it is spatulate and is 

 provided with stiff apical and ventral setae. Exopods are, of 

 course, present at the base of all the pereiopods ; they decrease 

 in size from before backwards. 



