424 0. 0. SARS, 



The eyes (see fig. 4) are comparatively small and of a rounded oval 

 form. The pigment would seem to have been of the usual bright red colour, 

 but in all the specimens it was quite absorbed by the action of the spirit. 



The superior antennae (fig. 2) about equal in length the cephalon and 

 the first 3 segments of the mesosome combined, and are accordingly some- 

 what shorter than in the arctic species. The peduncle is short and thick, 

 with the 1st joint very large, fully twice as long as the other 2 combined, 

 and somewhat applanatcd. The flagellum is about twice as long as the ped- 

 uncle, and is composed of 16 articulations, the 1st of which is much the 

 largest. It is provided in its proximal part outside with bundles of delicate 

 olfactory filaments, 5 of which belong to the 1 st joint. The accessory ap- 

 pendage is about half the length of the peduncle, and composed of 4 articu- 

 lations, the 1st of which nearly equals in length the other 3 combined. 



The inferior antennae (fig. 3) are somewhat longer than the superior, 

 and have the basal joint rather swollen, and transversely elliptical in form. 

 The penultimate joint of the peduncle is considerably larger than the last 

 one, and, like the latter, provided anteriorly with fascicles of delicate bristles. 

 The flagellum considerably exceeds in length that of the superior antenna?, 

 and is composed of about 20 articulations. 



The buccal mass (see fig. 4) is rather protruding, though to a great 

 extent covered laterally by the 1st pair of coxal plates (see fig. 1). The oral 

 parts on the whole resemble in structure those in the type species. 



The anterior lip forms in front a compressed rounded lamella (fig. 5), 

 which, however, is not very prominent. 



The posterior lip (fig. 6) has the lateral lobes slightly bilobed at the tip, 

 and exhibits on each side a narrowly rounded auricular expansion. The lobes 

 are finely ciliated both at the tip and along the inner edge. 



The mandibles (fig. 7) are rather strong, and have the cutting part 

 simple, with only a slight trace of a denticle on each corner. The molar 

 expansion is well defined, though not very large, and exhibits at the tip a 

 distinct triturating surface. The palp is affixed at the same level as the 

 molar expansion, and about equals in length the mandible. Its terminal joint 

 is somewhat shorter than the 2nd, and oblong oval in form, having the usual 

 supply of bristles. The 2nd joint, on the other hand, is almost naked, with 

 only 2 small bristles near its end. 



The 1st pair of maxillae (fig. 8) almost exactly resemble those in the 

 type species, having the masticatory lobe rather large and lamellar, with a 

 dense assemblage of partly denticulated spines at the anterior corner, and 

 behind them 3 smaller spines issuing from slight notche.s of the densely 



■tHS.-MiiT. CTp. 254, 4 



