ORDER DORSIBRANCHIA. 25 



CiRRHATULUS, Lam., 



Have a very long filament, serving as gills, and two small 

 bundles of bristles to each of the articulations of the body, 

 which are very numerous and very crowded ; there is, more- 

 over, a line of long filaments around the nape. Its head, but 

 little marked, has neither tentacula nor jaws, Lumhricus 

 cirrhatus, Ott., Fabr., Faun., Groenl. f. 5., from which the 

 Terehella tentaculata, Mont., Linn., Trans. IX. vi. and the 

 cirrhinere Jlligere, Blainv. pi. Diet, des Soc. Nat., do not 

 appear to me to difierin genus ; Cirrh. Lamar ckii., Aud. and 

 Edw. Littoral, de la France, Annelid., pi. vii. f. 1 — 4. 



Palmyra, Sav., 



Are recognised by their upper fasciculi, the bristles of which 

 are large, flatted, disposed like a fan, and shine like the most 

 finely polished gold. Their inferior fasciculi are small ; their 

 cirrhi and gills but little marked. They have the body elon- 

 gated, two tentacula tolerably long, and three very small. 



But one is known, from the Isle of France, one or two 

 inches long, Palmyra aurifera, Sav. 



Aphrodita, Lin,, 



Are easily recognized in this order by the two longitudinal 

 ranges of broad membranous scales which cover their back, to 

 which, through a very groundless assimilation, the name of 

 elytra has been given, and under which their gills are con- 

 cealed, in the form of small fleshy crests. 



Their body is generally of a flatted form, and shorter and 

 broader than in the other Annelida. We observe in their in- 

 terior a very thick and muscular oesophagus, capable of being- 

 protruded externally like a proboscis. The intestine is un- 

 equal, and furnished on each side with a great number of 



