158 NEREIDiE. 



as its lobe. Inferior cirrus rather short. Spines dark brown. 

 Bristles numerous, pale yellow, smooth and slender. 



In spirits the worm is generally of a uniform cream or ochre- 

 yellow colour, with a brown line across the front of every segment, 

 and there are two spots of the same or of a rich yellow colour at the 

 base of the dorsal lobe of every foot. These spots appear to be 

 constantly present, and consequently afford a good character of the 

 species ; but they are sometimes less perceptible than is desirable. 



(a) Berwick Bay, Dr. Johnston. 



(h) Barmouth, Merionethshire, C. Stokes. 



8. N. pulsatoria, post-occipital segment about the same length as 

 the second ; tentacular cirri rather short ; superior cirrus not reach- 

 ing beyond the apex of the lobe ; terminal piece of the bristles 

 minutely serrulate along one side. 



Nereis pulsatoria, Montagu. Aud. fy M.-Edw. Litt. de la France, ii. 



194. pi. 4. f. 8-13. Grube, Fam. Annel. 49. 

 Lycoris pulsatoria, Savign. Syst. Annel. 33. 



Hub. Shores of the south of England. 



Obs. There is no specimen in the collection, nor have T seen one. 

 It appears to be the only species that has the terminal piece of the 

 acicular bristles serrulated. The jaws are represented to be multi- 

 dentate to the very point. 



12. NEREILEPAS. 



Nereilepa ( — ), Blainv. in Diet, des So. nat. Ivii. 469. 

 Nereilepas, Oersted, Annul. Dan. Consp. 20. 

 Nereis A, Aud. 8f M.-Edw. Litt. de la France, ii. 185. 

 Nereis B, Grube, Fam. Annel. 49. 



Char. Head and mouth similarly furnished with Nereis : seg- 

 ments alike or nearly so, the posterior with the feet most developed ; 

 the dorsal lobe of the foot wdth a hump or crest above the base, 

 anterior to which the cirrus originates : ventral cirrus remote from 

 its lobe at its insertion : bristles with acicular and falcate terminal 

 pieces. 



1. N. fucata, jaws multidenticulate, with a plain point; tentacular 

 cirri not longer than the diameter of the head ; post-occipital seg- 

 ment a little larger than the second ; feet oblique, the dorsal lobe 

 disproportionably larger than the others, more prominent, strongly 

 humped, with its cirrus extending beyond the papillary point ; 

 inferior cirrus reaching to or beyond the apex of its lobe. Length 

 6"; breadth 4-5'". 



Millepeda marina belgica, Sehn, Tfiesour. i. pi. 81. f. 8. 



