LEPIDONOTUS. 117 



Desc. Body a little narrowed posteriorly ; the back covered with 

 the scales ; and the sides densely fringed with the yellowish bristles 

 which protrude considerably. Head large, quadrangular ; the eyes 

 black, and the anterior pair rather wider apart than the posterior. 

 Medial antenna longest ; the palpi and tentacula smootla, rather 

 incrassated than bulbous below the point, and unmarked with a 

 black ring. Scales oblique, roundish or somewhat reniform, un- 

 ciliated, clouded, rough, with minute granules which cover the entire 

 surface, and with some larger conical tubercles on the posterior margin 

 and scattered over the disc. Under a high magnifier the granules 

 appear depressed or perforated on the top ; and the tubercles arise 

 within a circular circumscribed base. Feet thirty-nine pairs ; the 

 ventral branch oblong, with a long point, and the setaceous inferior 

 cirrus reaching to the base of it. Dorsal bristles in a circular 

 spreading tuft much shorter than the ventral, stout, gently curved, 

 and tapered to a point, striate crosswise ; ventral bristles in two 

 fascicles separated by the pointed apex of the branch, stout, the 

 shaft cylindrical, gently curved to a claw-like point, with a denticle 

 immediately below, and strongly denticulated along the scooped 

 side of its upper third. Anal styles rather short. 



Allied to L. setosissi?nus and scaber. The scales in L. setosissimus 

 (assuming the figure of Quatrefages to represent Savigny's species, 

 Cuv. Regn. Anim. ilhistr. Annel. pi. 19. f. 2) are fringed with cilia ; 

 the ventral branch of the foot is obtuse, and its bristles are spino- 

 denticulate to the very apex. L. scaber has also this lobe of the 

 foot without a point ; its bristles are not bidentate, and all the ten- 

 tacular organs are villous. 



(«) South coast of Devon, J. Crunch . 



7. L. pellucidus, scales fifteen pairs, imbricate, thin and transparent, 

 fringed sparsely with clavate hairs ; antenna, tentacula, and dorsal 

 cirri setaceous ; ventral bristles bidentate, with about ten series of 

 denticulations underneath. Length \" . 



Polynoe pellucida, Dyster in lift. 



Hab. The Laminarian zone. Tenby, F. D. Dyster, Esq. 



Obs. " Eyes four : antennae and cirri setaceous. No. XVIII. 

 without the spear-head termination of those of L. 

 squamatus ; and the setse are essentially diflPerent. 

 The scales are fringed sparsely with clavate hairs, 

 mvich like the glandular hairs of plants. In the 

 dorsal bundle of setse are some very beautiful hairs 

 like this (No. XVIII. fig. 31); and the longer 

 bristles in the ventral tuft have a slightly curved _ 

 point, a denticle of great delicacy beneath, and ^^ 



eight or ten bunches of denticulations beneath. The scales are 

 excessively thin and transparent, so as to show the outline of the 

 body beneath. Cavidal styles prolonged. Worm very active." — 

 F. D. Dyster. 



