SERPULID^. 251 



Sabellaria crassissima, Lain. Anim. s. Vert. v. 352 ; 2(le edit. v. 605. 

 Templeton in Loud. Mag. Nat. Hist. ix. 234. Grube, Fam. Annel. 85. 

 Hermella crassissima, Quatrefages in Ann. des Sc. nat, x. 26 (1848). 

 Alveolaria arenosa, Leach, Mus. 



Hab. Near low-water-mark on our southern and western coasts. 

 («) Sandgate, Kent, Leach. 



3. S. lumbricalis, opercular lid with three rows of dissimilar palese, 

 the exterior palmate, with the central digitation greatly prolonged 

 and spinous. — Tubes irregularly massive, formed of coarse sand. 



Sabellaria spinulosa?, Grube, Fam. Annel. 85. 



Sabella lumbricalis, Mo7it. Test. Brit. 549. Turt. Brit. Faun. 203. 



Stew. Elem. ii. 423. Penn. Brit. Zool. edit. 1812, iv. 3/0. 

 Alveolaria lumbricalis, Mus. Leach. 



Hab. The coralline region, and oyster beds. 



Obs. The arenose masses formed by the tubes resemble exactly 

 those of S. anglica, but the worm of S. lumbricalis is readily distin- 

 guished by the form of the exterior paleee of the opercular crown. 

 The body is 1" long, gradually tapered backwards, with a long 

 caudal appendage, the abdominal portion red or purplish-red. The 

 post-occipital segment is white and smooth, without lobes. The 

 brauchise are narrow, and as long as the diameter of the body. The 

 abdomen has 24 segments, and becomes swollen, ovate-oblong, and 

 roughish when it is about to terminate in the narrow tail. 



(«) South Devon, George Montagu. 



(b) Berwick Bay, Dr. Johnston. 



Fam. XVII. SEEPULID^. 



Serpulacka, Grube, Fam. Annel. 85. 



Char. Body vermiform, roundish, with short segments, usually 

 divided into the thoracic and abdominal by the relative position of 

 the bristles and uncini : head amalgamated with the following seg- 

 ment, not noticeable in the full-grown animal : the first segment 

 generally encircled with a collar, and furnished with a tuft of bristles 

 on each side : mouth anterior, placed between the branchiae, edentu- 

 lous : feet almost always biserial ; in the thoracic division the dorsal 

 are setigerous tubercles, the ventral transverse linear series of uncini ; 

 in the abdominal and longer division the lineated uncini are dorsal, 

 and the setigerous tubercles ventral ; and sometimes these are want- 

 ing, as are seldomer the uncinated series : bristles simple, usually 

 lance-shaped and sharp : uncini siphonate : branchiae attached to 

 the vertex, flabellate, in two divisions, the rays usually pectinated, 

 and radiating from a common cartilaginous base. Tubicolous. 



