REPORT ON THE AMPTTIPODA. 1539 



is at once distinguished from the other Hyperidean genera by the form of the last joint 

 of the flagellum of the first pair of antennae and by the peculiar armature of the second 

 paii- of pereiopoda [Second Gnathopods]. In other respects it forms a link between 

 the Hyperidean and the Platyscelidean groups of the tribe." He does not, however, 

 describe " the last joint of the flagellum of the first pair of antenna?," which is by no 

 means the same in the new species, Tryphana boecki, as that described and figured by 

 Boeck for Tryphana mahnii. Gerstaecker, who in 1886 rightly kept this genus distinct 

 from Lycsea, in his definition leaves the eyes doubtful " (Augen ?)," but this doubt was 

 needless, since Boeck in the description of the type-species had expressly said that the 

 eyes occupy the whole sides of the head. 



Tryphana boecki, n. sp. (PI. CXCIV.). 



Head deeper than long, as long as the first three or four segments of the perseon ; 

 head and perseon together shorter than the pleon ; first three segments of the pleon large, 

 the posterolateral angles almost right angles, the acute points being minute ; all parts 

 of the animal having dark spots very irregularly distributed, on the whole not very 

 numerous. 



Eyes occupying all the sides of the head, with large and elongate pigment-mass. 



Upper Antennze attached in front to the under side of the head; the first joint 

 of the peduncle widening abruptly from a narrow attachment, widening distally, not 

 longer than broad, the two following joints short, their outlines rather indistinct except 

 at the upper edge ; the first joint of the flagellum short and broad, little convex on the 

 upper edge, otherwise almost circular, the filaments of the brush round the lower edge 

 being longer than the joint ; the second joint longer than the first, within the slightly 

 projecting apex of which it is attached, slender, its width distally for a third (or some- 

 times more) of the length being abruptly reduced to less than half that of the proximal 

 part, the long lower margin having ten little groups of setules, and the truncate apex a 

 bunch of them ; the shorter upper margin has at its apex a long spine with two little 

 hairs at the blunt tip, this spine probably being the third joint ; between this spine-like 

 third joint and the produced lower part of the second joint there is a very small process, 

 not longer than broad, its distal margin occupied by three filaments, which reach to the 

 end of the third joint. 



Lower Antennae attached at the back of the head ; the gland-cone only slightly 

 projecting, the joint which bears it being partially free ; the following or third joint of 

 the peduncle visible outside the lower part of the hind margin of the head, broad, some- 

 what oval, two or three times as long as broad, the edges smooth ; the fourth joint much 

 narrower, not twice as long, narrowed a little from the base, the distal part widest, 

 closely fringed with short filaments on the inner edge, and with nine or ten distant cilia 



