TEREBELLA. ANNELIDES. 133 



A. ventilabrum, Lam. (Sabella penicillus, Lin.) Branchial filaments 

 very fine, plumose, fan-shaped ; body subdepressed. Inhabits 

 Mediterranean sea. Ellis, Cor. pi. 34. 



A. magnified, Lam. Branchial tentacula thick and short ; bran- 

 chiae orbicularly expanded, and varied with numerous naked, red 

 and white cirri. Coasts of Jamaica. Lin. Trans, v. pi. 9, fig. 1 . 



A. vesiculosa, Lam. Branchiae pectinated, slightly spreading ; tube 

 quadrangular, covered with fragments of shells. Inhabits coasts 

 of England. Lin. Trans, xi. pi. 5, tig. 1. 



A. volutacornis, Lam. Branchiae spirally convoluted, fimbriated. In- 

 habits European seas. B. Lin. Trans, vii. pi. 7, fig- 10. 



Gen. 7. TEREBELLA, Lam. 



Body tubicular, elongated, cylindrical- depressed, narrowed pos- 

 teriorly, scarcely annulated by the transverse segments, with 

 a row of nodulous and setiferous papillae on each side ; ten- 

 tacula numerous, filiform, twisted, surrounding the mouth, and 

 terminating its anterior part ; two rows of ramose branchiae 

 disposed on one side below the tentacula. Tube elongated, cy- 

 lindrical, attenuated and pointed at the base, membranous, 

 with agglutinated grains of sand or fragments of shells. 



T. conchilega, Lam. (Nereis, Pall.) Tube composed of fragments 

 of shells j branchiae three on each side. Inhabits coasts of Hol- 

 land. Lam. v. 354. 



T. cristata, Lam. Tube fragile, flexuose, composed of mud and 

 fragments of shells ; branchiae two on each side. Inhabits Nor- 

 thern seas Lam. v. 354. 



** Branchice short ; tentacula short or none. 



Gen. 8. SABELLARIA, Lin. Lam. 



Body tubicular, subcylindrical, attenuated posteriorly, with bun- 

 dles of subulate bristles in one row on each side, and with 

 spatulous bristles, and transverse laminae, bordered with hook- 

 ed setae ; anterior extremity truncated obliquely, elliptical, 

 crowned by six rows of brilliant spangles, three rows on each 

 side ; mouth an elongated cleft, bilabiate ; branchiae small, 

 near the mouth. Tubes numerous, united in a common mass, 

 composed of grains of sand and fragments of shells, with cup- 

 shaped orifices. 



S. alveolata, Lam. Tubes numerous, parallel, with the orifices open, 

 forming in the mass the appearance of honeycombs, composed 

 chiefly of sand, with minute fragments of shells ; tubes sometimes 

 above three inches long. Inhabits coasts of Europe, on rocks. B. 

 Penn. Brit. Zool. pi. 95, fig. 1. 



Gen. 9. PECTINARIA, Lam. 



Body tubicular, subcylindric, attenuated posteriorly, with a row 

 of setiferous papillae on each side ; bristles short, fasciculated ; 



