162 



LEPIDASTIIENIA SIBOGAE. 



with certainty, but they contain a great number of dark, 

 yellowish, glandular (?) cells. The dorsal cirri are also 

 very short and do not exceed the elytra much in length 

 except at the anterior segments. The parapodia are very 

 slender ; in the posterior region they are (with the bristles) 



as long as the breadth of 

 the body, in the anterior part 

 they measure two thirds of 

 it. The notopodial fascicle is 

 absent and only represented 

 by the acicula; the neuro- 

 podial bristles are faintly 

 curved in their distal part 

 and show a short subterminal 

 dilatation with a small number 

 of transverse spinous rows. 

 The inferior setae of this 

 fascicle have a simple undi- 

 vided apex; however some 

 ^^S- ^- of the superior ones have a 



bifurcated tip, the main point of which is elongated in a 

 long, slender, acute limb, whereas the other limb measures 

 about a third of it. 



In my opinion the situation of the elytra in this species 

 affords a new argument in favour of the morphological 

 similarity of the elytron and the dorsal cirrus, for 

 in Lepidasihenia sihogae the tubercula dorsalia (elytron- 

 tubercles) are not only totally absent, but the elytra are 

 fixed at the extremity of long elytrophores, quite agreeing 

 in their situation and appearance with the oirrophores. 



It is well known that Darboux '), in his elaborate memoir 

 on the Aphroditidae, contests anew the homology of the 

 elytron and dorsal cirrus like in the days of Audouin 

 and Milne-Edwards, almost a century ago, and his com- 

 patriot Gravier appears to agree with him ; for he 



1) Recherches sur les Aphroditiens: Bulletin scientif. de la Franco et de 

 la Bclgique, t. XXXIIl, 1900. 



Notes from the Leyden Miuseum, "Vol. XXXV. 



