1522 THE VOYAGE OF H.M.S. CHALLENGER. 



iointino- as those of Eupronoe, yet the peduncle of the front pair is more slender and 

 produced, the penultimate joint of the hinder antenna relatively shorter, since it scarcely 

 ecmals a third of the preceding joint." In the shaft or peduncle of the front pair he 

 includes, it must be remembered, what in this Report is regarded as the first joint of the 

 flagellum. In regard to the jointing of the hinder antenna, it may be noticed that the 

 third (first free) joint of the peduncle is shorter than the next joint in Eupronoe armata, 

 Claus, and other species of Eupronoe, in the new species Parapronoe campbelli, and in 

 the new genus Sympronoe, which includes Parapronoe parva, Claus, but in Parapronoe 

 crustulum, Claus, and Parapronoe clausi, n. sp., this joint is longer than the next 

 following. 



'&■ 



Parapronoe campbelli, n. sp. (PI. CLXXXIX.). 



Head and perseon much compressed, head much shorter than perseon, pleon longer 

 than head and perseon together ; the first two segments of the pleon with the postero- 

 lateral angles acutely produced, the third segment with the angles not rounded but not 

 produced ; the fourth segment not very much shorter than the composite segment which 

 follows ; the body flecked with numerous spots of colour, which are orange in the 

 preserved specimens, the first three segments of the pleon inscribed with numerous little 

 longitudinal marks. 



Upper Antennze. — First joint of the peduncle broader than long, the two following 

 joints short, all three strongly marked with hexagonal scale-markings ; the first joint of 

 the flagellum rather sharply bent, the upper margin having clistally three pairs of filaments, 

 the lower margin very convex, covered with a dense brush of filaments, the rounded apex 

 not produced to the end of the small second joint, which from a narrow neck is a 

 little dilated, and carries on the upper margin two pairs of filaments ; the third joint 

 is longer and more slender than the second, and has very near the apex a pair of short 

 filaments. 



Lower Antennie. — The third (first free) joint of the peduncle long, a little curved, 

 more than two-thirds the length of the next joint, the distal part wider than the proximal, 

 the concave margin fringed with little filaments like the corresponding margin of the 

 following joints ; the long and narrow fourth joint a little widened at the distal end ; 

 the fifth joint a very little shorter than the fourth ; the first joint of the flagellum 

 slender, a little curved, scarcely more than half the length of the third joint of the 

 peduncle, the filaments at and near the apex longer than elsewhere ; the second joint 

 minute, about a quarter of the breadth of the preceding joint, and scarcely twice as long 

 as broad ; to this succeeds a much smaller third joint tipped with three little setules. 



Mandibles. — The trunk rather long and narrow, the cutting edge downward bent, 

 with a prominent tooth at the top and another much smaller and sharper at the 



