166 ALEPAS CORNUTA. 



Size and Colour, — The largest specimen, including the 

 peduncle, was half an inch in length, and ^ths of an inch 

 across the capitulum; colour, after having been long 

 in spirits, brownish-yellow. 



Filamentary Appendages, one on each side, short, 

 tapering and pointed; seated on the posterior margin 

 of a slight swelling beneath the basal articulation of 

 the first cirrus ; they are about equal in length to the 

 pedicels of this cirrus. 



The Mouth is directed abdominally ; labrum much 

 produced downwards, so as to be far separated from the 

 adductor muscle ; moderately bullate, forming about one 

 third of the longitudinal axis of the entire mouth ; upper 

 part forming a slightly overhanging prominence ; crest 

 with a row of blunt, bead-like teeth, and externally to 

 them there are numerous curved short bristles. 



Palpi (PI. X, fig. 8,) unusually narrow, a little hollowed 

 out along their inner margins ; pointing towards the 

 adductor muscle ; thickly covered with doubly serrated 

 bristles. 



Mandibles, with either two or three teeth ; inferior angle 

 narrow and tooth-like ; both sides covered w r ith strong 

 bristles or spines, projecting beyond the toothed edge. 



Maxillce, with two large upper spines, and a third 

 rather distant from them ; beneath these, there is a wide 

 notch or hollow ; inferior part square, projecting, bearing 

 six pair of moderately long spines, (of which the central 

 one is the longest,) mingled with finer ones. 



Outer Maxillce, with a semicircular outline; the serrated 

 bristles in front are divided into two groups ; externally 

 there is a rounded and very considerable projection 

 covered with long bristles. Olfactory orifices slightly 

 prominent, approximate, seated within and just beneath 

 the rounded projections at the base of the maxillae. 



Body. — Prosoma little developed ; thorax small. 



Cirri, extremely long, but slightly curled, capable of 

 being protruded so as almost to touch the base of the 

 peduncle or the surface of attachment ; segments short, 



