404 CARL BOVÄLLIUS, AMPHIPODA HYPERIIDEA. I. 2. ANCHYLOMERID^. 



Euprimno macropus. 



twice as long as the twt) following together. The first joint of the flagellum is somewhat 

 longer than the whole peduncle, turaitl, feebly tapering towards the apex, and sparingly 

 provided with short olfactory hairs; the following joiuts are short, only a little longer than 

 broad, and each is furnished with one or two minute hairs on the under margin. The 

 flagellar joints are twenty-six or twenty-eight in nuraber. 



The second pair of antennce are rauch longer than the tirst, and in the adult male 

 reach almost to the hind margin of the second pleonal segment. The tirst free joint of the 

 peduncle is as long as broad, nearly globular; the glandular cone is only a little shorter 

 than the tirst peduncular joint; the second joint is a little longer than the tirst; the third 

 is somewhat shorter and nai-rower. The tirst joint of the tiagellum is long and slender, 

 feebly tapering towards the apex, and a little shorter than the peduncle; the following 

 joints are cylindrical, slender, and considerably longer than broad. The flagellar joints 

 are twenty-two or twenty-three in number. 



The labrum is small and faintly bilobed. 



The mandihles (Pl. XVII, tig. 26 and 27) are short but stout. The incisive lamina 

 is finely crenulated, with a large rounded prominence at the outer corner and a smaller 

 one at the inner; the secondary lamina of the left mandible is small, and is armed with 

 three teeth. The molar tubercle is large, furnished with densely set sharp-pointed teeth 

 and long bristles. The mandibular palp is comparatively short, tixed a little above the 

 middle of the stem; the tirst joint is very short, only a tritle longer than broad; the 

 second is more than three times as long as the first; the third is about as long as the 

 second. 



The labium is thick; the lateral lobes are provided with bristle-like hairs. 



The first pair of maxillce (Pl. XVII, tig. 28) have the principal lamina spoon-shaped, 

 and the margins fringed with stout spines. The secondary lamina is feebly curved, and 

 armed at the apex with six or seven sharp teeth. 



The second pair of maxillce (Pl. XVII, tig. 29) are comparatively small. The prin- 

 cipal lamina is short, triangulär, and armed at the apex with three spine-like bristles. 

 The secondary lamina is narrower, curved, sparingly fringed ^\•ith long hairs, and armed 

 with a spine-like bristle at the apex. 



The ma,vil lijjeds (Pl. XVII, tig. 30) have the stem almost linear. The lateral lamina 

 are narrowly lanceolate, the margins fringed with short hairs. The median lobe is obtuse 

 at the apex, and fringed witli minute hairs. 



The perceon is only a little longer than the tirst two pleonal segments together; it 

 is not much compressed, and very deep. The first segment is fully as long as the second; 

 the seventh is the longest of all, and is dorsally produced in the median line into a sharp- 

 pointed process, which is almost half as long as the tirst pleonal segment in the adult 

 animal, but much shorter in the younger, and entirely wanting in the very young. 



The epimerals are distinct; they are broader than long, with the corners rounded, 

 except in that of the second pair, which has the front corner sharp-pointed. 



The hrnnchial vesicles are attached to the second, third, fourth, fifth, and sixth pairs 

 of perajopoda; they are full}' as long as the femora of the corresponding pairs, except that 

 of the fifth pair, Avhich is shorter than the feraur. 



