384 Dr. C. Chilton on 



L. japonicn. In side view tlie small tubercle on the last 

 segment presents pretty well the appearance shown by 

 Pfeffer in his side view of L. antarctica. 



The upper antennse have the second joint subequal with 

 the first and slightly longer than the third, the flagelluni is 

 represented by two or tliree small joints bearing long- 

 olfactory seta3. I have not seen anything corresponding to 

 the small nodule described by Caiman (1910, ]). 184) as 

 perhaps representing a vestige of the inner flagellum. The 

 second antennae do not differ appreciably from those of 

 L. lignorum. 



In the mouth-parts^ the mandibles (PI. XVII. fig. 1) differ 

 distinctly from those of the other species in having the palp 

 quite small and composed of two subequal slender joints, the 

 terminal one of which bears two or three small setfe at the 

 extremity. The body of the mandible appears to be very 

 similar to that of L. lignorum^ and ends in a fine sharp 

 cutting-edge, which shows no division into separate teeth ; on 

 the outer portion between the cutting-edge and the palp is a 

 strong subacute projection as in L. lignorum, and on the 

 inner side there is the usual row of setse, though apparently 

 no trace of the molar tubercle. 



The cutting-edge of the mandible in L. lignorum is usually 

 shown as entire and not divided into teeth ; in one specimen, 

 however, tliat I examined there are faint indications of its 

 division into three teeth (fig. 6). In this specimen, 

 too, the inner surface below the cutting-edge was covered 

 with small, closely-set, imbricating teeth forming an efficient 

 rasping organ ; probably the same structure is common to 

 other specimens, but it is rather difficult of observation, and 

 I failed to detect it in some specimens examined, though it is 

 quite distinct in the one figured. 



The first and second maxillaj are essentially the same as 

 those of L. lignorum^ except that the first maxilla appears to 

 be slightly shorter and stouter. 



In the maxillipeds (fig. 2) the epipod reaches beyond tlie 

 end of the second joint and is rounded at the end, sligiitly 

 narrowed towards the base, and its greatest breadth is about 

 one-fourth the length ; the whole margin of it is fringed with 

 small finely plumose seta?. In other respects the maxilliped 

 is liardly distinguishal)le from that of L. lignorum. 



The first pair of legs (figs. 3 and 4) resembles that of 

 L. lignorum, and the accessory spine on the inner side of the 

 dactyl is bidentate as in that species, its smaller tooth being 

 of minute size : in L. andrewsi, Caiman, the accessory spine 

 is tridentate; from the distal end of the propod there sjjrings 



