352 UK. BAIRU ON SEVERAL GENERA. OP EUNICEA. 



buccal segment. Eyes, tentacle, antennae, palpi, and branchiae as 

 in Eunice. Compound setae having the falciform appendage fre- 

 quently long and without teeth on its edge. 



Sp. 1. Marpkysa sanguinea. 



Nereis sanguinea, Montagu, Linn. Trans, xi. 20. t. 3. f. 1. 



Leodoce opalina, Savigny, I. c. 



Nereidonta sanguinea, Blainville, Diet. Sc. Nat. 



Eunice sanguinea, Cuvier, Aiidouin 8f M.-Edwards, Grube, Sfc. 



Marphysa sanguinea, Quatrefages, I. c. 



In this species, which has been the object of much and careful 

 investigation by M. Quatrefages, and which is not uncommon on 

 our southern coasts, the simple setse of the feet are long, nar- 

 rowly lanceolate, with a much elongated and acute point. The 

 pectinate setae are of two kinds : — one slender, broad at the apex, 

 finely pectinate, like the teeth of a small-tooth comb, and having 

 the outermost longer and stronger than the others ; the other 

 coarser, shorter, and having the teeth much stronger and fewer in 

 number, like those of a large-tooth comb. Compound setae rather 

 slender, witli the falciform appendage long, slender, and termi- 

 nating in a sharp point, which is straight, and not toothed on the 

 edge. The aciculae are four or five in number in the upper feet, 

 three in those of the middle third, and only two in the feet of the 

 lower third of the body : one of these is generally smaller than 

 the others and of a lighter colour, as if it were taking the place 

 of the uncini ; but, like the aciculae, they are nearly straight, obtuse 

 at the point, and not forcipate. The pectinate setae, of both 

 kinds, are much more numerous in the feet of the lower third of 

 the body ; and the compound setae become fewer and more slender. 

 ITab. South coast of England, Falmouth, South Devon, and 

 Polperro, coast of Cornwall {Mus. Brit.) ; coast of France, Qua- 

 trefages. 



In our own collection at the British Museum we have from 

 Polperro a small Annelid which is either a young one or a small 

 variety of the M. sanguinea. The only differences I can observe 

 are, its being much more slender in all its proportions, and the 

 aciculae being only three in the feet of the upper third, and only 

 one in the middle and lower third of the body, while there is a dis- 

 tinct uncinus, somewhat curved and slightly forcipate at the apex. 



Sp. 2. Marphysa Parishii, Baird. 



Body about 32 inches long, composed of about 350 segments, 



