EEPOET ON THE AMPHIPODA. 773 



Lower Anteima}. — First joiut a little dilated, the gland-coue of the second short and 

 broad, decurrent, the canal within the cone wider than usual, appearing to be surrounded 

 with sphincter muscles ; the third joint much longer than broad, a little curved, armed 

 with spines ; the fourth joint much longer than the fifth, longer than the first joint of 

 the upper antennae, its upper margin fringed with setules and having some spines at the 

 upper part; the fifth joint shorter than the first joint of the upper antennae, the straight 

 margins fringed with setules ; the flagellum slender, shorter than the fifth joint of the 

 peduncle, consisting of twelve joints. 



Epistome very sharply pointed. 



Upper Lij) with the front margin very unsymmetrically bilobed, the longer and 

 narrower lobe smooth, the rest of the margin fringed with long wiry cilia. 



Mandibles. — The cutting plate widening at the cutting edge, divided into five strong 

 teeth, the two uppermost on the left mandible being flattened and to some extent sub- 

 divided ; the secondary plate on the left mandible has its widened edge divided into ten 

 teeth, of which the sixth from the top and the lowest are the most prominent ; the 

 uppermost tooth on the principal plate of the right mandible is divided into five denticles, 

 the secondary plate is very small, almost triangular, placed near and not exceeding in 

 width the uppermost tooth of the principal plate, its distal border cut into twenty 

 denticles, the lower part having also two rows of submarginal denticles ; the spine-row 

 consists of many large curved spines, the largest nearest the cutting edge ; twenty-nine 

 were counted on the left and thirty -four on the right mandible ; no trace of molar 

 tubercle ; palp slender, first joint very short, much broader than the second ; second very 

 long, carrying numerous long spines which seem to be almost but not quite smooth ; the 

 third short and thin, about a quarter the length of the second, tipped with a couple of 

 spines. 



Loiver Lip not well observed ; the texture very thin. 



First Maxillai. — Inner plate small, oval, with a seta on the inner margin just below 

 the apex ; outer plate with a row of setae at the top of the inner margin, the apical spines 

 seven in number, two of them short, several (perhaps all except the outermost) having a 

 single lateral denticle, which in one or two is large ; the first joint of the palp fuUy half 

 as long as the second ; the second reaching beyond the outer plate, its inner margin 

 straight, the outer convex, the narrowed apex carrying four rather long spines, two of 

 which are apically curved. 



Second Maxillae. — Inner plates much broader than the outer, with three spines on 

 the inner margin, and six on the broad distal margin, too-ether with two that are sub- 

 marginal, one very small and one very large ; the spines are spaced, stiS", not setiform ; 

 the outer plate does not reach beyond the inner, it has three strong spines on the narrow 

 apex, and the convex outer margin strongly ciliated. 



Maxillipjeds. — The inner plates almost as broad as long, reaching halfway up the 



