134 ANNELIDES. SEDENTARLE. 



anterior part broad, blunt, oblique, with golden \erybrilliant 

 transverse spangles ; mouth elongated, bilabiate, surrounded 

 with short and numerous tentacula ; four pectinated bran- 

 chiae, exterior, on the second and third segment of the body. 

 Tube in the form of a reversed cone, membranous or papyra- 

 ceous, arenaceous, not fixed. 



P. Belgica, Lam. (Nereis, Pall.) Tube inversely conical, mem- 

 branaceous, covered with fragments of sand. Inhabits seas of 

 Europe Mull. Zool. Dan. pi. 26. 



P. Capensis, Lam. (Nereis, Pall.) Tube subcylindrical, thin, dia- 

 phanous. Inhabits Indian seas. Lam. v. 350. 



FAMILY III. MALDANLE. 

 Branchiae indeterminate ; tube open at both ends. 



Gen. 10. DENTALIUM, Lin. 



Body tubicular, with the anterior extremity exsertile, conical, 

 and surrounded by a membranous ring ; mouth terminal. 

 Tube testaceous, almost regular, slightly bent, attenuated to- 

 wards the posterior extremity, and open at both ends. 



This genus is pretty numerous in species ; and a good many are found fossil. 



* Tubes with longitudinal ribs or striae. 



D. elephantinum, Lam. Shell greenish, clouded with brown, and whit- 

 ish towards the truncated point, slightly bent, with ten longi- 

 tudinal ribs. 2^ to 4 inches long. Inhabits Indian and Euro- 

 pean seas IFArgenv. pi. 3, fig. H. 



D. dentalis, Lin. Shell slightly curved, with about twenty longitu- 

 dinal striae, the alternate ones smaller. 12 to 14 lines long. In- 

 habits European seas. B Browns Illust. pi. 1, fig. 2. 



** Tubes smooth. 



D. entails, Lin. Shell slightly curved, taper, continuous and smooth. 

 About 1^ inch long and two lines in diameter. Inhabits Euro- 

 pean seas. B. Brown's Illust. pi. 1, fig. 7- 



Gen. 11. CLYMENE, Lam. 



Body tubicular, slender, cylindrical, with a row of setiferous pa- 

 pillae on each side ; anterior extremity oblique, with a semi- 

 circular margin or lip, which advances beyond the mouth ; 

 no tentacula ; posterior extremity dilated and orbicularly 

 expanded, with dentations ; tube slender, open at both ends, 

 and incrusted exteriorly with grains of sand and fragments 

 of shells. 



C. amphistoma, Lam. Inhabits the shores of the Red sea. Lam. 

 v. 341. 



FAMILY IV. DOKSALLE. 

 Branchiae dorsal, or disposed longitudinally along the body. 



