ORDER DORSIBRANCHIA. 
23 
having seen it, M, Savigny proposes to form a genus, which 
he names Lycastis, has tentacula and cirrhi, bead -like, as in 
Syllis ; but its tentacula are represented of an even number. 
It has also need of a new examination. 
GLYCERA, Sav,, are recognized by their head being in the 
form of a fleshy and conical point, which has the appearance 
of a little horn, and the summit of which is divided into four 
very small tentacula, scarcely visible. The proboscis of some 
still presents jaws. It is said that in others there is no ap- 
pearance of this kind, Nereis alba, Mull. Zool., Dan. lxxii. 
6 , 7. ; Glt/c. Meckelii , Aud. and Edw. Littor. de la France. 
Annel. pi. vi. fig. 1. 
Nephtiiys, Cuv, The proboscis of phyllodoce, but no 
tentacula, and on each foot two bundles of bristles, very much 
separated, between which is a cirrhus, Nephthys Hombergii , 
Cuv. represented in the Diet, des Sc. Nat. 
Lumbrinera, Blainv., 
Want tentacula; their body, very much elongated, has at each 
articulation only a very small forked tubercle, from which 
issues a small bundle of bristles. If there be an external 
organ of respiration, it can only be an upper lobe of this 
tubercle, nereis ebrancliiata , Pall., Nov., Act. Petrop. ii. pi. vi. 
f. 2 ; Lombrinere brillant , Blainville, pi. of the Diet, des Sc. 
Nat. ; Lumbricus fragilis,Mu\\., Zool. Dan. pi. xxii., of which 
M. Blainville makes, but with some hesitation, his genus 
Scoletoma. 
N. B. The Scolo lopes, Blainville, which are known 
only by the figure of Abildgaardt, Lumbricus squamatus , Zool. 
Dan. I\ . civ. 1 5., have a very slender body, with numerous 
rings, to each of which is a cirrhus serving as a gill, and two 
bundles of bristles ; the inferior of which seems to issue from 
a fold of the skin, compressed like a scale ; their head has 
neither jaws nor tentacula. 
