Miscellanea Zuologlca. 67 



thejifth with crotchets, the rest with, papillous feet like the anterior 

 segments, but furnished besides with a branchial cirrus refected on 

 the back: anal segment campamdale, the anus opening in its concave 

 centre. 



L. Ciliatus. Plate III. Fig. 1-6. 



Hob. In crevices of slaty rocks near low- water mark. In Ber- 

 wick Bay. 



Description. — Worm from 6 to 8 lines long, linear-elongate, or 

 slightly tapered to the tail, somewhat quadrangular, of a yellowish 

 or flesh colour, with a dark red line down the middle. Head small, 

 depressed, in the form of a short cylindrical proboscis, encircled 

 with a raised hood or membrane ; mouth edentulous ; eyes 4, mi- 

 nute, placed in a square at the base of the antenna?, which are more 

 than a fifth of the length of the body, tapered, wrinkled, and cloth- 

 ed along their inferior sides with short cilia. Segments numerous, 

 narrow, distinct, the first four with an inferior papillary cirrus on 

 each side, and a brush of retractile bristles ; the fifth with a series of 

 bristles curved like an italic f obtuse, not capable apparently of 

 being protruded like the others, and having rather a more ventral 

 position ; the following segments have on each side an obtuse bran- 

 chial cirrus originating from the dorsal margin, as long as half the 

 diameter of the body, held either erect, or reflected across the back 

 to meet its fellow on the mesial line, beneath it a small mammillary 

 foot, armed with five or six sharp slightly curved bristles of unequal 

 lengths, under this a bundle of much smaller bristles (crotchets?) 

 with a small conical cirrus with a still more ventral position. The 

 branchial cirrus is clothed on its lower aspect with rather long move- 

 able cilia ; it becomes very small or entirely disappears on the pos- 

 terior segments, in which the bristles on the contrary appear to be 

 longer and more developed ; bristles simple, unjointed ; anal seg- 

 ment conformed into a circular cup or sucker, in the centre of which 

 the anus opens by a small round aperture. 



In this worm the cilia which cover the under sides of the bran- 

 chial processes are remarkable for their size and length, for they 

 can be seen with a common magnifier fanning the water with equal 

 and rapid beats, and driving the current along their surface. Their 

 analogy with the cilia of zoophytes is obvious, but here their motion 



Creator, and of filling up a blank in our knowledge of His works, will at once 

 divine the origin of this name so strangely applied to a worm. 



" Nomen habes niveis nunc inscriptum ergo lapillis." 

 The scholar may remember that the name was originally formed by some clas- 

 sical wit for Dr Whitgift, the famous Archbishop of Canterbury, temp. reg. 

 Elizab — See Walton's Lives by Zouch, p. 209. York, 1807. 



