LEPAS HILLII. 79 



instead of up fully three fourths of their length, as in 

 L. anatifera. 



The chitine membrane at the base of the capitulum, 

 especially at the anterior and posterior ends, is covered 

 with beautiful, little, embedded, yellowish beads, about 



th of an inch in diameter ; above this, on each side of 



2000 



the carina, there is a space with similar but smaller little 

 spheres, and still higher up still minuter ones ; others 

 occur on different parts of the capitulum ; these spaces 

 are seen to be distinctly separated from each other, and 

 present a beautiful appearance under a high power. 



Peduncle, as long as, or rather longer than, the capitu- 

 lum : in one set of specimens, however, it was thrice or 

 four times as long as the capitulum. The peduncle, in 

 some specimens, was conspicuously covered with trans- 

 verse plates of yellowish hard chitine. 



Filamentary Appendages. — Three on each side ; one on 

 the flank of the prosoma, with a pair beneath the basal 

 articulation of the first cirrus ; relative lengths various, 

 but the posterior filament of the pair under the cirrus, is 

 the shortest. Mouth; palpi not much acuminated; 

 maxillae step-formed, but with the upper or first step in 

 some specimens indistinct, or forming a curve. Cirri ; 

 the segments of the first cirrus and of the posterior arm 

 of the second cirrus are highly protuberant, the protuber- 

 ances sometimes equalling half the thickness of the seg- 

 ments themselves. Caudal appendages smooth, rounded. 



Size. — The largest specimen which I have seen, in 

 the collection of Mr. Cuming, had a capitulum 1-^th of 

 an inch long, and 1 \ wide ; therefore not quite equalling 

 in size the largest specimens of L. anatifera. 



Colours. — When fresh, valves blueish-grey from the 

 underlying corium, edges of all the valves and round the 

 orifice, and round the top of the peduncle, bright orange- 

 yellow, passing into the finest scarlet, and varying 

 slightly in tint in different specimens. Space between the 

 carina and the other valves, and between the occludent 

 margins of the scuta, rich purplish-brown ; peduncle 



