1170 THE VOYAGE OF H.M.S. CHALLENGER. 



slender spines, which lie alongside of the much stronger ungual spine, not in agreement 

 with the latter part of Boeck's account, that " the fourth joint is very narrow towards the 

 end and furnished with two strong spines." 



First Gnathopods. — Second joint very short, broader than long ; with slender spines 

 at the hinder apex ; third joint narrowing distally, longer than broad, having an acute 

 front apex resting on the wrist, slender spines at four points of the hind margin and some 

 small groups on the inner surface ; wrist not much longer than the third joint, broader than 

 lone, distally cup-like, with spines on and near the short projecting hind margin ; the hand 

 large, longer than broad, the front margin convex, with some groups of slender spines 

 near it, the hind margin scarcely half the length of the front, strongly serrate, with three 

 powerful spine-teeth in the notches ; the palm long, oblique, sinuous, commencing with a 

 rounded tooth, within which is planted a small palmar spine ; the finger long and broad, 

 the narrowed apex reaching beyond the palm to the second spine-tooth of the hind margin, 

 much of its inner margin strongly denticulate, its outer margin carrying six transverse 

 rows of very long pectinate spines. Of these conspicuous ornaments of the finger, Say 

 makes no mention, but it is more curious that Boeck also leaves them unnoticed, 

 although for his own two species, Glauconome kr0yeri and Glauconome steenstrupii he 

 mentions spines on the hind margin of this finger. Kroyer in his description emphatically 

 remarks that " the finger shows the altogether unusual circumstance of being furnished 

 on the front side with a number of long coarse close-set bristles." 1 



Pleopods. — The peduncles (in the pair examined) much shorter than the rami, 

 cibated, and carrying a few slender plumose setae ; the coupling spines rather large, 

 broad at the base, bent, with four retroverted teeth in a series below the minute one at 

 the apex ; the inner ramus longer than the outer, 2 the first joint not very long, much 

 dilated on the outer side, on which distally it carries three setae, on the inner margin 

 armed with five graduated cleft spines, the lowest the longest, the longer arm strongly 

 serrate on the inner margin, the shorter widened just before the apex and then sharply 

 pointed; the joints of the inner ramus eighteen in number, the outer ramus with an inter- 

 locking process at the base of the first joint, its outer margin dilated, carrying seven or 

 eight flattened setae, the joints seventeen in number, the feathered setae on both rami 

 long and strong. 



Uropods. — The angle of the fourth pleon-segment is produced with a strongly 

 serrate margin far along the side of the peduncles of the first pair of uropods ; these 

 peduncles are much longer than the rami ; the inner ramus i3 a little shorter than the 

 outer ; the second uropods are much smaller than the first with less difference in length 

 between the peduncles and the rami, but the peduncles are longer than the rami, the 

 inner ramus a little shorter than the outer ; the third uropods very small, the peduncle 



1 Naturh. Tidsskr., R. 2, Bel. i. p. 497. 



8 Kr0yer says, " the outer little longer than the inner." 



