106 APHRODITACE^. 



Plate X. Fig. 1. Aph. borealis of the natural size. 2. The same on 

 the ventral aspect. 3. The anterior part magnified. 4. The same 

 seen from below. 5. The proboscis laid open. 6. An outhne of a 

 foot. 7. The ventral branch of a foot more highly magnified. 8. 

 Two spines. 9. Bristles of the superior fascicle. 10. A filiform 

 bristle. 11. A bristle from the ventral branch. 12. Bristles from 

 the inferior fascicle of the dorsal branch. 13. A portion of the skin 

 of the belly magnified. 



** Scales naked = Hermione, Blainville. 



3. Aph. hystrix, proboscis with minute jaws ; some bristles of the 

 dorsal branch of the foot serrulate at their point ; those of the ven- 

 tral branch forked ; inferior cirrus very short. Length 2" ; breadth 

 7'". Plate XI. fig. a-e. 



Halithea hystrix, Savig. Syst. Annel. 20. Lam. Anim. s. Vert. v. ; 



2de edit. v. 543. Cuv, Regn. Anim. iii. 20/. Risso, VEurop. merid. 



iv. 413. 

 Hermione hystrix, Blainv. Diet. Ivii. 457, but not the figure so named 



in the Atlas. 

 Aphrodita hystrix, Aud. Sf M.-Edw. Litt. de la France, ii. 70. pi. 1. 



f. 1-9. Johnston in Ann. Nat. Hist. iv. 370; v. 305. pi. 5. f. a-e. 



Oersted, Annul. Dan. Consp. 11. Grube, Fam. Annel. 36. 

 Aphrodita hispida, Jones, Anim. Kingd. 214. f. 88. 



Hab. The British coast in from 20 to 30 fathoms. 



Desc. Body elliptic-oblong, depressed, the back covered with 15 

 pairs of imbricated naked scales ; the sides hirsute and spinous, with 

 golden and brown-coloured bristles ; the ventral surface of a dirty 

 blackish-brown colour, covered with a coriaceous tuberculated skin, 

 marked with transverse parallel rugae along the margins, and with a 

 narrow depressed space down the centre. Head small, entirely con- 

 cealed under the front scales ; eyes very distinct, occipital, peduncu- 

 late ; between and above the peduncles there is a short porrect 

 biarticulate antenna, and on one side of the mouth a long awl-shaped 

 ciliated palpus invested with a fleshy sheath at the base. Proboscis 

 large and muscular. Scales large, irregularly heart-shaped, smooth, 

 soft, thin and membranous, with entire even margins, overlapping 

 each other on the median line and behind ; the anterior pair is small, 

 rounder than the others, and hidden under those that follow ; and 

 the posterior pairs are likewise so much imbricated, that the anal 

 ones are almost concealed : they are all attached to a fleshy peduncle, 

 and are of a greyish or flesh-colour tinted with brown. Feet 32 

 pairs ; the anterior and posterior are minute, but they gradually in- 

 crease in size towards the middle of the body, where they attain 

 their greatest development. They are of two kinds, — the squami- 

 ferous and cirrigerous, — but a foot of either is divisible into two 

 branches, viz. a ventral and dorsal. The ventral branch (or proper 

 foot) forms a stout, rough, tuberculated, conoid process, armed with 

 a stout spine protruded from the pale papillary apex, and with four 

 or five firm bristles proceeding from under the apex, and partially 



