ISOPOD ANUltOPUS BUANCHIA.TUS. 15 



longer than the antennulae, slender, the two pi'oximal joiutd rather 

 short, the third a little longer and the fourth a little shorter 

 than the two proximal ones together. 



Lahrum {rj in PI. 4. figs. 1 & 2). — It is somewhat smaller than in 

 Em^ydice and other Cirolanince, but not very different in shape ; 

 it is about twice as broad as long, with the basal margin slightly 

 concave, the distal rather flatly convex. 



Mandibles (h in PL 4. figs. 1 & 2). — These are robust in their whole 

 length, a little narrower at the base than at the middle. They 

 show on the whole considerable resemblance to those in Girolcma, 

 but still differ in several features ; and nearly all the differences 

 may be considered as reductions from the type of the Girolanince. 

 About their proximal two-thirds are directed obliquely forwards 

 and somewhat inwards and downwards ; the distal third turns 

 strongly towards the middle line ; tlieir direction presents there- 

 fore a si age intermediate between those in Glrolana-Eurydice 

 and AlcironincB. Their condylns outside the lateral margin of 

 the labrum is short. The cutting-edges are less produced, and 

 therefore shorter than in Cirolana-Eiirydice, meeting both' above 

 and behind the labrum aa in these genera ; the posterior angle is 

 acute and very little produced in both mandibles, but the two 

 other teeth seen on the cutting-edges of the genera mentioned 

 are not present iuAnuropus. The laeinia mobilis (PL 4. fig. 3, /) 

 is rudimentary ; the margin between the cutting-edge and the 

 molar process (PL 4. fig. 3, m) is long, slightly convex, and — as 

 far as could be observed without dissection — only adorned w ith a 

 number of very short and thin setae (comp. Girolana). The molar 

 process (PL 4. fig. 3, m) is moderately large, compressed, oblong, 

 shaped nearly as in Eurydice, but only with fine and shoru jsetiE 

 along the anterior margin, and firmly united with the mandible 

 (in Girolana-Eurydice it is movably articulated to the body of 

 the mandible), not even marked off by any suture. Of one of 

 the palpi two joints {i in PI. 4. figs. 1 & 2) have been preserved ; 

 the second joint is shorter than in Girolana-Eurydice. 



MaxillidoB (first pair of maxillae, auctorum) (PL 4. fig. 2, 1 ; 

 fig. 4). — These agree closely with those in Eurydice. The lobe 

 of the first joint (?') is well developed, distally rather robust, 

 with three long, plumose spines. The lobe of the third joint 

 {V) is very broad, its oblique terminal margin has a number 

 of partially thick s[.iaes. (The basal portion of this appendage 

 could not be studied without a dissection.) 



