WORMS. ZOOPHYTA. 78. Sertularia, 213 



site, minute : vesicles large, all on one side, square- 

 oval. 



Fail. el. Zooph. p. 136. . 83. 



On the Cornish coast, about 4 inches long. 



708. S.fiiscescens. Grey-brown, pinnate : denticles near- /\ 

 ly opposite, tubular : vesicles numerous, minute, all 



on one side, with 3 tubercles on each. 



Baster op. subs. \. tab. i.fig. 6. 



On the Cornish-toast j refembles the last. 



709. S. cupressina. Panicled, very long: denticles near- 

 ly opposite, obliquely truncate and a little pointed : 

 vesicles obovate, toothed each side. 



Ellis Corallines p t 7. tab. 3. n. 5. fig. a. A. 



Refembles S. tamarifca, but the denticles are obliquely truncate, 

 pointed, and not toothed or undulate on the top ; and the central 

 tube is shorter. 



710. S. argentea. Panicled, with alternate branches: 

 denticles nearly opposite, pointed : vesicles oval. 



Ellis Corallines p. 6. tab. 2. n. 4.7". c. C. 



Refembles S. pumila, but the denticles are not recurved, or 

 feated on oval joints, and the vefcicles are distinctly oval. 



71 L S. rugosa. Branches scattered: denticles alternate, x 

 obsolete : vesicles much wrinkled, 3-toothed at 

 top. 



Ellis Corallines p. 26. tab. 15. n. 23. f. a. A. 



On the Flustra foliacea, and other Corallines : stem twisted. 



712. S. halecina. Erect, alternately branched : denticles 

 alternate, tubular, jointed: vesicles oval, united 

 along the side to a small tubular stalk; stem com- 

 posed of united tubes. 



Ellis Corallines p. 17. t. 10. Phil. Trans. 48. f, 17. /. E. F, G. 



Stem growing to 6 or 8 inches high, stiff, brittle when dry, con- - 

 sisting of numerous fmall tubes growing nearly parallel to each 

 other: denticles of two joints, cylindrical: vesicles oblong-oval, 

 with a short tube at the top, 



713, S. Thuja. Stem zigzag, naked at bottom, with a 

 tuft of dichotomous branches at top,: denticles alter- 

 nate, on each side and closely appressed to the bran- 

 ches : vesicles obovate, with a rim at top. 



Ellis Corallines p. \o.tab 5. n. g.f. b. B. 



Stem erect, stiff, knotty, with a clofe-fet panicle at top : vesicles 

 at the bottom of the branches, furnished with a lid. 



Ill, .S. Myriophyllum. Branches leaning one way : stem 

 gibbous on thfe side opposite the branches : denti- 

 cles appressed to the stem, all on the underside of 

 the brandies, truncate. 



Ellis Coral. p. 14. tab. 8. Soland. and. Ellis Zoophi p. 44. a,>i3. 



Stem about 3 inches long, pale horny, consisting of numerous 

 united tubes, channelled and indented, with large protuberances 

 opposite fome of the branches: denticles (cited in a focket, with 

 a short fpine on the lower .part. 



115. S.falaita. Stem flexuous, with alternate pinnate 

 branches: denticles all on one side, imbricate, trun- 

 cate ; vesicles oblong-oval. 



