272 SERPULTD^. 



Vermilia triquetra?, Philippi in Ann. Sf Mag. Nat. Hist. xiv. 15(>. 

 pi. 3. f. F. Grube, Fam. Annel. .92. 



Hab. The coralline region. 



Obs. The branchial tufts are spotted or barred with orange, white 

 and brown. The stalk of the operculum is short, thick, enlarging 

 upwards, and produced at each angle into a soft tentacular process ; 

 and between these the conical testaceous operculum is seated. The 

 tubes afford no specific character. 



{a) Berwick Bay, Br. Johnston. 



6. S. armata, branchiae with about eight filaments in each tuft ; 

 operculum knobbed with the top blunt, and armed with two or 

 three short obtuse spines, seated in the axil of two soft processes 

 prolonged from the short stalk. — Tube triquetrous, flexuose, with 

 a dorsal keel produced into a mucro above the aperture. 



Serpula triquetra, var. 2, Mont. Test. Brit. Suppl. 1 57. 

 Vermilia armata, Fleming in Edinb. Phil. Journ. xii. 243. 

 Patella tricornis, Turt. Conch. Diet. 139, operculum. 



Hab. The coralline region. 



Obs. The branchial tufts are equal, and banded with rich blue. 

 The point of the filaments is naked and setaceous. The stalk of the 

 operculum is thickened upwards, and produced into a fleshy tenta- 

 cular process on each side, the operculum being seated between them. 

 This is rather unequally swollen at the base, and fashioned with a 

 sort of short neck above, concave on the top, and armed with three 

 small obtuse spines placed in a triangle on the edges. The thoracic 

 portion of the body is reddish, and along each side of the abdomen 

 there is a band dotted with scarlet. 



(a) Berwick Bay, Dr. Johnston. 



This and the preceding (No. 5) are probably varieties of one 

 species, — the Serpula triquetra of British authors. See Sowerby, 

 Gen. ofRec. and Fossil Shells, tab. fig. 2. Turt. Conch. Diet. 152. 

 Berkeley in Loud. Mag. Nat. Hist. vii. 421. = Vermilia triquetra, 

 Templeton in Loud. Mag. Nat. Hist. ix. 233. Brown's Illustr. 

 pi. 2. f. 5.= Serpula triquetra, Penn. Brit. Zool. iv. 146 ; and S. 

 imbricata, ibid. pi. 92. f. 157. See also J. B. Harvey in Charlesw. 

 Mag. i. 477. 



7. S. Dysteri, branchiae with many filaments in each fan-shaped 

 tuft ; operculum on a short incrassated stalk, obovate, oblique, with 

 a roughish side-pad, and a tentacular process on the inner side. — 

 Tube cylindrical, with a dorsal keel produced into a mucro on the 

 margin of the aperture. 



Hab. The coralline region. 



Obs. As beautiful as the finest in its genus. The worm is an 



