266 



characters reler- tu tin- rostral plate, which does not a- usual t'onn the immediate 

 "ntintiation of the cephalic segment, hut. a- in X<,,-in<iit< H<i. is sharply defined 

 I'niin it at the base by a well-marked transverse suture. The second character 

 is t'uiind in the structure of tin- Nt pair of legs, the inner rauius of which has 

 attached inside the proximal joint a short, though well detined plumose seta, of 

 which no trace i- found in other /^injtlioiiliilir. except in the genus yt-Hi<in<-H<i. 

 \\V iinly know a- \ et a single species of the present genus. 



176. Laophontopsis lamellifera M'laus). 



(PI. (I, XXXV). 



<! /<////,///'/. ,-,/. Chins, Di.. freik'l>enl.-ii C..|iH|.n(len, \<. li'.'i. I'l. XV. figs. 2124. 



S/,,r,/ir ('Inn ,irl, VN. ---/'/// !<. Body narrow and elongated, slightly tapered 

 hehind. with the segments somewhat raised dorsally and fringed at the hind edge 

 with distant spinules. Rostral plate hroadly triangular in form, tip obtusely 

 rounded. I'rosome about the length of the anterior division, lateral expansions 

 obsolete, last segment fully as long as the preceding one, anal opercle finely den- 

 ticulate. Caudal lami twice the length of the anal segment and closely juxtaposed, 

 tap-.'iing somewhat distally. outer edge with 2 distant bristles, dorsal seta issuing 

 close to the base, middle apical seta scarcely half the length of the ranms. 

 the other 2 still smaller. Anterior antenna- short and stout, composed of 4 

 joints only, the last 2 of the proximal part, and all of the terminal part, beinu 

 confluent ; seta- of the anterior edge comparatively short, partly spiniform. Posterior 

 antenna' o!' ipiite normal structure. 1st pair of legs with the outer ramus D-arti- 

 culate ;nid about half the length of the proximal joint of the inner, plumose seta 

 of the hitter very -mall, and attached about in the middle. Natatory legs with 

 :he terminal joint of the outer ramus \er\ narrow, and provided in the anterior 

 pair with one. in the other 2 pairs with 2 srt;e inside: inner ramus in 2nd pair 

 of legs with only .'! setfie, in the other 2 pairs with 4. Last pair of legs with the 

 distal joint narrow linear in form, and provided with (i partly spiniform seta-. -1 

 of which are attached to the miter i-du'e. apical seta much the longest: inner ex- 

 pansion of proximal joint narrow linguiform. and extending considerably beyond 

 the middle of the distal joint, marginal setae ~> in number, the innermo-t one 

 somewhat remote from the others. U\i-ac of muder;ite >i/e and oval in form. 



.I/"/' not examined. 



Colour whitish grey. 



Length of adidt female o.s.s mm 



