120 CARL BOVALLltJS, AMPHIPODA HYPÉRIIDeA. I. i. liYVEmtDM. 



Eitmlopin Lovéni. 



mandible, the iirst joint is shovt and stout, the second is twice as long, cylindrical, the 

 third is still longer, tapering towards the apex. The palp is entirely smooth. 



The jirst pair of maxillce (Pl. VIII, fig. 6) consist of a short, globular, basal joint, 

 from it arises the principal lainina, forming a long, linear steni, the apical portion, or the 

 inner lower corner, is produced into a narrowing process, armed at the apex with six or 

 seven shai-p teeth. The secondary lamina is round, deeply hollowed, almost scoop-shaped, 

 covering the process of the principal lamina as a helmet, the margins are fringed with 

 short, spine-like bristles. 



The second pair of niaxilla} (Pl. VIII, lig. 7) have the principal lamina shoi-t and 

 stout, the inner lower corner is produced into a narrow, pointed process, fringed with short 

 bristles; the secondary lamina is elongate-triangular, sparingly set with short bristles. 



The maxillipeds (Pl. VIII, iig. 8) consist of a long, almost triangulär, basal joint, 

 bent forwards; at the unusually narrowed apex arise the two lateral laminaj, between 

 these lamina? projects a very short and feeble median lobe, bent somewhat inwards. The 

 lateral lamina? are very narrow, elongated, fringed Avith short hairs. 



The pera^on shows a peculiar form, the anterior parts of so me of the segments being 

 elevated, forming rolls, raised high above the hinder parts of the same segments. These 

 rolls are somewhat flattened in the male, and comparatively broader than in the female. 

 The first segment is not elevated, and scarcely moi'e than half as long as the second. 

 The second segment is a little longer than the third, and nearly as long as the seventh 

 segment, which is the longest of all; the anterior half of the second segment is elevated. 

 The anterior elevated part of the third segment is more than twice as long as the hinder 

 depressed part. The elevated parts of the fourth and fifth segments ai"e much longer than 

 the corresponding hinder parts. The whole sixth segment is elevated bnt is not as high as 

 the preceding ones. All the elevated parts of the second to sixth segments are densely 

 covered with long hairs, the depressed parts are also hirsute, but the hairs are veiy short. 

 The seventh segment is not elevated, but covered with long hairs, as the preceding ones. 



The epimerah are as long as the under margins of the corresponding segments. 

 The epiméral of the first pair is twice as deep as long; that of the second pair is about 

 a third more deep than long, the following epimerals decrease in deptli, the last one being 

 more than twice as long as deep. 



The hninchial säcks are fixed to the second to sixth pairs of perieopoda; they are 

 almost as long as the femora of the corresponding pairs. 



The first pair of perceopoda (Pl. VIII, lig. 9) are a little shorter than the second pair. 

 The fem ur is nearly as long as all the following joints together, more than three tiraes as long 

 as broad; the front margin is feebly convex, the hind margin almost straight. The genu 

 is as long as broad, scarcely shorter than the tibia. The tibia is a little broader below 

 than above, the hinder lower corner is not at all produced. The carpus is considerably 

 shorter than the two preceding joints together, dilated, much broader below than above, 

 the hinder lower corner is produced into a very short, gouge-shaped process, armed at 

 the apex with a long, strong, terminal spine. This carpal process is so short that the meta- 

 carpus impinges against it in an angle of almost 90°; the leg is thus fully suhcheliform. 

 The metacarpus is a little longer than the carpus, scarcely narrower at the apex than at 



