264 SERPULID^. 



45. PROTULA. 



Protula, Risso, L'Europe merid. Blainv. in Diet, des Sc. nat. Ivii. 



432. M.-Edw. in Ann. des Sc. nat. (1845) iii. 160. Grube, Fam. 



Annel. 89. 

 Sabella ( — ), Cuv. Regn. Anim. iii. 

 Apomatus, /S. Psygmobi'anchus, Philippi in Ann. Sf Mag. Nat. Hist. 



xiv. 155 & 156. 



Char. Body vermiform : head truncate, discoid, with a free collar, 

 crowned with a pair of fan-shaped plumose branchiae, the filaments 

 united in a cartilaginous base : tentacula two, setaceous, between the 

 branchise : thorax with a lateral membrane on each side : abdomen 

 myriapodous, tapered backwards, sometimes subclavate near its ter- 

 mination, the anal segment simple and entire : venter with a narrow 

 band extending the length of the worm : bristles simple, bent near 

 the lance-shaped acute point : uncini siphonate. — Tube calcareous, 

 cylindrical, affixed by the base and otherwise free. 



Blainville doubted the existence of this genus, which is defined 

 in a very confused manner by Risso. 



1 . P. protensa, tube cylindrical, even or irregularly vrrinkled circu- 

 larly, chalk-white, attached by the base, flexuous or almost straight, 

 the margin of the aperture even and plain. Length 5-6" ; breadth 



Pinceau de raer, Rond. Hist, des Poiss. ii. 7G. 



Penicillus marinus Rondeletii, Aldrov. de Test. lib. iii. 561 . 



Penicillus = Meerbensel, JoA?js^. Hist. nat. de Exang. Aquat, tab. 17. 



cum fig. 

 Serpula tubularia, Mont. Test. Brit. 513 (1803), and Suppl. 171. 



Turt. Brit. Faun. 202. Fleming in Edinb. Encyclop. vii. 6] . pi. 204. 



f. 9. Fenn. Brit. Zool. edit. 1812, iv. 362. Dillw. Rec. Sh. 1083. 



Laskey in Wern. Mem. i. 413. Fleming in Edinb. Phil. Journ. xii. 



243. Johnston in Loud. Mag. Nat. Hist. vii. 126. f. 23. Berkeley 



in ibid. vii. 421. Brown, Illustr. pi. 2. f. 9, 10. Landsborough, 



Excurs. Arran, 32. 

 Serpula intestinum, Lam. Anim. s. Vert. 2de edit. v. 619. 

 Serpula arundo, Turt. Conch. Diet. 155. Berkeley in Zool. Journ. 



iii. 229. 

 Sabella tubularia, Berkeley in Zool. Journ. v. 426. Johnston in Ann. 



4- Mag. Nat. Hist. xvi. 449. 

 Psygmobranchus protensus, Philippi in Ann. ^ Mag. N. H. xiv. 161. 

 Protula protensa, Grube, Fam. Annel. 90. 



Hab. The coralline region. 



Desc. Body vermiform, flattened, narrowed posteriorly, of a red- 

 dish-orange colour blotched with irregular stains from the opacity of 

 the viscera and their contents. Head a subcircular disk furnished 

 with two large fan-shajied branchise with filaments of a yellowish 

 colour beautifully marked with scarlet sj)ots. The tufts are scarcely 

 one-fourth the length of the body, and the filaments in each are 



