■ibi 



a somewhat unusual form, being very much expanded in their outer part, 

 and forming in frontalinguiform lobe advancing beneath the cephalon as far 

 as the insertion of the inferior antenna?. The 2 succeeding pairs (see fig. 4) 

 are of regular oblong quadrangular form and transvei'sely truncated at the 

 tip. The 4th pair (see fig. 5) are very large and expanded, being fully as 

 broad as they are deep, and projecting below the posterior emargiuation as 

 a distinct angle. 



The epimeral plates of the metasome are of moderate size, and the 2 

 posterior pairs but very slightly produced at the lateral corners. 



The urosome is comparatively short and stout, being quite smooth above, 

 with only an extremely minute spinule on each side of the dorsal face of the 

 last segment. 



The eyes are not very large but of a narrow oblong form, with well 

 developed visual elements and dark pigment. 



The antennae are comparatively short and nearly equal-sized, scarcely 

 exceeding in length '4 of the body. The superior ones (fig. 2) have the 1st 

 joint of the peduncle very large and massive, considerably exceeding in 

 length the other 2 combined. The flagellum is scarcely longer than the ped- 

 uncle, and is composed of only 9 articulations. The accessory appendage 

 does not attain the length of the last 2 jjeduncular joints combined, and is 

 composed of 3 ai-ticulations. The inferior antenna? have the last joint of the 

 peduncle smaller than the penultimate one, and the flagellum nearly as long 

 as the peduncle and 6-articulate. 



The gnathopoda (figs. 3, 4) are comparatively small and feeble, resem- 

 bling in structure those in the 3 preceding species. The propodos in the 

 anterior pair (fig. 3) is a little broader than in the posterior (fig. 4), where 

 it is scarcely larger than the carpus. In both pairs the palm is very short 

 and nearly transverse. 



The 2 anterior pairs of pereiopoda are rather strongly built and, especi- 

 ally the 2nd pair (fig. 5), very densely clothed with slender bristles, which 

 form a dense fringe along the posterior edge of the meral and carpal joints. 

 The former joint is very lai-ge and expanded, and the latter likewise unusu- 

 ally broad and regularly oval in form. 



The 3 posterior pairs of pereiopoda (figs. 6 — 8) are comparatively 

 slender and nearly of equal length, with their outer part edged with fascicles 

 of delicate bristles. In all pairs the meral joint is somewhat expanded, 

 whereas the carpal and propodal ones are linear in form and about equal in 

 length. The basal jdint of the antepenultimate pair (fig. 6) is of a rounded 

 oval form, with the iufero-posteal corner somewhat produced and rounded 

 oflf; that of the penultimate pair (fig. 7) is considerably narrower and ob- 



4'n3.-MaT. CTp. 334. 12 



