WORMS. TESTACEA. 61. 8abetla. 203 



projecting in a fomewhat funnel-shaped manner, but a little com- 

 pressed sideways 



q21.- S. conchilega. Thin, brittle', usually attached its 

 whole length in a serpentine manner on old bivalve 

 shells. 



Brit, Zool. n. i6i» tab. 26. lower figure. 



Shell compofed of large fragments of shells, and very little fand 

 cemented on a thin membrane, 4 or 5 inches long, often interwoven 

 together : differs from the last, in being attached, in its larger com- 

 ponent parts, and in wanting the funnel-shaped fibrous mouth. 



§28. S. lumbricalis. Coarse, attached, variously twisted 

 and entwined, composed of coarse sand with frag* 

 ments of shells cemented together. 



Montague Brit. Shells, p. 549. n. 6. 



Shell with a strong tube, 2 or 3 inches long, a quarter wide, 

 strongly fixed to stones' and other bodies. Inhabitant with a rather 

 fpreading probofcis, fringed round the edge with bristles : mouth 

 with 4 Idng bristles, arid intermediate shorter-ones: head with 

 numerous capiHary^ red tentacula on the back part. 



629* S. cirvata. Thick, brittle, a little tapering, com- 

 posed of sand mixed together and slightly ce- 

 mented. 



Montague 'Brit. Shells p. 550. n. 7. 



. Shell 6 or; 7 inches long, foft when moist, crumbling when dry. 

 fnfiabitarit red, annulate, round, with triple lateral fafcicles. 



630. S. arenaria. Cylindrical, equal in size at both ends, 

 very brittle, composed of sand slightly cemented 

 without internal membrane. 



Montague Brit. Shells. p. 552. n. 8„ 



Shell about the size of a raven's quill : refembles S. granulata, 

 but is less, of equal thickness throughout, and has no internal 

 membrane. 



631. S. subeylindriaa. Subcylindrical, slender, brittle, 

 composed of fine sand and minute particles of broken 

 shells, cemented on a tine membrane, adhering by 

 their flat sides. 



Shell about, 3 inches long, the tenth of an inch wide, of nearly 

 the fame size throughout. 



632. S. setiformis. Slender, tapering, composed of very 

 fine fragments of shells and stones, placed obliquely 

 and imbricate over each other. 



2. Fragments not imbricate, with fometimes a lateral branch 

 near the fmaller end* 

 Montague Brit. Shells p. 553. n. 10. 



Shell 3 or 4 inches long, double the size of a hog's bristle, taper- 

 ing to half the size at the lower-end. 



633. S. curta. Short, a little taper, affixed by the small- 

 er end, composed of sand and minute fragments of 

 shells cemented on a tough membrane. 



Montague Brit. Shells p. 554. n. 1 1. »"."'• 



Shell fometimes formed of fand only, hardly half an inch long, 

 the size of a crow's quill, generally naked at the lower-end for half 

 its length, and fixed by its flexible membrane. 



634. S. compressa. Short, tjroa J, very flat, composed of 

 large fragments of flat bivalve shelis with their con- 

 vex sides upwanis. 



