254 SERPULID^. 



vertical, between the branchise, and with or without two small seta- 

 ceous tentacula on each side : two or three post-occipital segments 

 apodous : segments of thoracic portion equal, chetopodous, with a 

 dorsal series of uucini to each foot : abdomen myriapodous, with 

 equal segments, each with a pair of setigerous feet, and a series of 

 ventral uncini, reversing the position they had on the thorax : anal 

 segment small, with a terminal vent without appendages. — Tube 

 cylindrical or tapered at the base, made of fine mud, smooth ex- 

 teriorly, and coated with a fine membrane interiorly. 



* Branchial filaments in a single row. 



1. S. pavonina, body slender, elongate; two setaceous tentacula; 

 branchial tufts with slender free filaments spotted on the rachis ; 

 thorax with nine pairs of setigerous feet. Length 5" ; breadth 1'". 

 — Tube slender, smooth and even. Length 6" ; breadth 1'". 



Tubularia penicillus, Midi. Zool. Dan. Prod. no. 3063 ; Zool. Dan. 



iii. 13. tab. 89. f. 1,2, Fleming in Edinb. Phil. Journ. viii. 295, 



Fubr. Faun, Groenl. 438. 

 Amphitrite penicillus. Lam. Anim.s. Vert. v. 356; 2de edit. v. 610. 

 Sabella pavonina, Savign. Syst. Aunel. 79. Grube, Fam. Annel. 88. 



Hah. The coralline region, 



Obs. The tubes are usually clustered, a little creeping at the base, 

 and thence rising up erect : they are cylindrical, composed of fine 

 mud cemented and lined with a glutinous membrane. — They resemble 

 those of S. jienicillus, but differ in being much smaller. 



(a) The Nore, J. Henslow. 



2. S. penicillus, body greatly elongated, as thick as a quill ; bran- 

 chial fans large and equal, fasciated with brown and spotted ; two 

 setaceous tentacula ; thorax with nine pairs of setigerous feet. 

 Length 12-15", — Tube cylindrical, smooth, formed of fine mud. 

 Length 18-24"; breadth 3"'. 



Scolopendra major tubularia, Bast. Opusc. Subs. i. ii. TJ . tab. 9. f. 1. 



Sabella penicillus, Linn. Syst. xii. 1269, Mont. Test. Brit. 541. 

 Penn. Brit. Zool. edit. 1812, iv. 369. 



Nereis lutravia? Pall. Misc. Zool. 116. tab. 10. f. 1. 



Amphitrite ventilabrum, var. 2, Turt. Gmel. iv. 82. Jameson in Wern. 

 Mem. i. 558, Turt. Brit. Faun. 136. Stew. Elem. i. 389. Penn. 

 Brit. Zool. edit. 1812, iv. 90. Lam. Anim. s. Vert. v. 356; 2de 

 edit. V. 610. Payraudeau, Annel. Sf Mollusq. de Corse, 20. Dalyell 

 in Edinb. New Phil. Journ. xvii. 415 ; Anim. Scot. ii. 280 ; Pow. 

 Great, ii. 212. pi. 30. 



Amphitrite penicillus, Mus. Leach. 



Sabella penicillus, Johnston in Ann. Sf Mag. Nat. Hist. xvi. 449, 



Hab. The coralline region, 



Desc. Body vermiform, subcylindrical, tapering a little to the pos- 



