62 CARL BOVALLIUS, AMPHIPODA HYPBRIIDEA. I. 2. MIMONECTID^. 



are glandular cells. The first pair of antennae are longer than the head, longer in the 

 male than in the female. 



The second 'pair of antenna 3 (PI. V, fig. 6) are very small, fixed a little behind the 

 first pair at the under side of the head. They consist of four joints; in the female the first 

 joint is thick, almost globular, the second longer, the third shorter, and the fourth still 

 shorter. In the male the last joint is long, narrow, about twice as long as the third. 

 Between the bases of the first and second pairs of antenna? there is on each side a tu- 

 bercle or prominence (PL V, fig. 5) showing a comparatively large opening at the apex, 

 it will be more fully described below in the morphological part of this treatise. 



The labrum is very small, the lower margin broadly rounded, sparingly beset with 

 minute hairs. 



The mandibles are comparatively short, the stem is thick, with a small molar tu- 

 bercle, the incisive process is short, armed with four to five small teeth. They want 

 a palp. 



The labium is bi-lobed, beset with short hairs. 



The first pair of maxilloe (PI. V, fig. 7) have the principal lamina feebly curved, 

 truncated at apex, and armed with four unequal, sharp teeth. The secondary lamina, or 

 the palp, is long, almost straight, narrow at apex, smooth. A small appendicular lamina 

 arises at the inner side of the principal lamina; it is smooth. 



The second pair of maxillae (PI. V, fig. 8) consist of two lamina?, the principal one 

 armed with three long, strong spines at apex, and between these three or four very short 

 bristles. The secondary lamina is narrow at apex, with two spines. 



The maxillipeds (PI. V, fig. 9) consist of two basal joints, the first short and broad, 

 the second, articulating with the first, is longer, carrying two semicircular, lateral lamina?, 

 truncated at apex, and a median lamina or lobe, deeply divided in the middle so that it 

 seems to consist of two lamina?. 



The perceon. Of the segments forming the globe the second is the highest and 

 longest; the first and third segments are almost equal in length and height, the fourth 

 is shorter, the sixth is the shortest and lowest. The following two segments are normal, 

 not inflated; the sixth is longer than the seventh. The more or less ovate base or under 

 surface of the globe is bordered by the under margins of the head and the first five pe- 

 ra?onal segments. This under surface is covered with a thin membrane, not marked off 

 transversally for the different segments. 



The epimerals of the first to fifth pairs are large, and almost as long as the under 

 margins of the corresponding segments, those of the third pair are the largest. The epime- 

 rals of the sixth and seventh segments are very small, much shorter than the under 

 margins of the corresponding segments. 



The branchial sacks (PI. V, fig. 18) are attached to the second to sixth pairs of 

 pera?opoda, those of the second to fifth pairs are half as long as the corresponding legs, 

 that of the sixth pair is shorter. 



The ovitectrices (PL V, fig. 18) are elongated, three to four times as long as broad, 

 fringed with long simple hairs, they are attached to the second to sixth pairs of pera?o- 

 poda; those of the second to fourth pairs are longer than the branchial sacks, and only 



