188 GLYCERACE^. 



position. 2. The same, with the proboscis protruded. 3. The head 

 magnified. 4. A view of the proboscis fully extruded. 5. The apex 

 of the proboscis viewed in front to show the jaws. 6. Three views 

 of a jaw detached and magnified. 7. A side-view of a foot from 

 near the middle of the body slightly compressed. 8. A view of two 

 feet fi-om above. 9. A bristle highly magnified. 10. The tail mag- 

 nified. 



4. Gr. nigripes, the cornute head not papillary at the rings ; segments 

 with one or two rings ; feet palmate, with three nearly equal pointed 

 lobes, the setigerous coalesced, the apices of the lobes black ; no 

 superior cirrus distinct from the dorsal lobe. Length 2-3" ; 

 breadth 2". 



Nereis (Nephthys) hirsuta ?, Dalyell, Pow. Great, ii. 145. pi. 21. f. 1-3. 



Hab. Shores of Scotland. 



Desc. Worm scolopendra-like, slender, about 2 inches long and 

 2 hnes in breadth, so distinctly annulose that specimens in spirits 

 appear crenulate, of the usual yellowish-brown colour, dotted on the 

 sides, especially behind, vdth dark specks from the black lobules of 

 the feet. Head cornute, tilted back when the proboscis is protruded, 

 the apex crowned with four small antennae. Proboscis, when fully 

 extruded, nearly half as long as the body, clavate, villose vdth close- 

 set tufts of minute papillae, which, being of equal size and height 

 and arranged in series, cause the surface to appear neatly crenulate 

 under a low magnifier. Jaws four, very black, strongly curved, not 

 serrate, but with processes at the base and sides like those of G. capi- 

 tata. The anterior feet are closely approximated, but they become 

 more distant posteriorly, with one or two intermediate annulations. 

 The feet are uniramous, divided palmately into three nearly equal 

 acute lobes, the mid one rather most prominent ; and between the 

 lobes the bristles are protruded. The bristles are all slender, clear and 

 smooth, gracefully curved, compound, the point tapered and very 

 acute. On the posterior half of the body the feet become very pro- 

 minent, with a cylindrical base divided into three unequal lobes, the 

 superior more prominent than the others, and furnished with a cirrus 

 not to be distinguished from the lobules organically. There is no 

 cirrus on the anterior feet, except in the form of a small undeveloped 

 lobule. 



The blackness of the feet depends on the colour of the tips of the 

 lobules. This character is usually distinctly marked, and is always 

 most decided on the posterior feet. There are also a few black 

 streaks at the base of the feet. 



A number of the specimens I have seen have the posterior portion 

 of the body distinguished from the anterior by being abruptly nar- 

 rower and tail-like. This is probably a renovated portion in indi- 

 viduals that had been accidentally mutilated. 



Obs. Of a pale yellowish-brown in spirits, and distinguished 



