WORMS. ZOOPHTTA. 78. Sertularia. 213 



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

 oval. 



FalL el. Zooph. p. 136. n. 83. 



On the Cornish coast, about 4 inches long. 



708. S.fuscescens. Grey-brown, pinnate : (tentacles near* 

 \y opposite, tubular : vesicles numerous, minute, all 

 on one side, with 3 tubercles on each. 



Baster op. subs. 1. tab. i>fig» 6. 



On the Cornish-coast 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. 7. tab. 3. n..$.ftg. a. A. 



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

 pointed, and not toothed or undulate on the top; and the centra) 

 tube is shorter.. 



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

 denticles nearly opposite, pointed : vesicles oval. 



Ellis Corallines p. 6. tab. 2. n.^.f. c, C, r 



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

 f sated on oval joints, and the vefcicles. a&e distinctly oval. 



711. S. rugosa* Branches scattered: denticles alternate, 

 obsolete : vesicles much wrinkled, 3-toothed at 

 top. 



EWj Corallin-es p. 26. tab. i&. n. 23./. 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. PAiL Trans. 48. fj 17./. E. F* G. 



Sie*»*growir*g tO!6,or:8 inches. high, stiff,- brittle. : w-ben- dry, con- 

 sisting of numerous fmall tubes growing nearly, parallel to each 

 oitrfer : denticles of two joints, cylindrical: vesicles, oblong^oval, 

 with a short tube at the.top,, . 



713. S* Thuja* Stemzigzag, naked at bottom, with a 

 tuft of dichotomous branches at top : detiti clonal ter- 

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

 ches : vesicles obovate^ with a rim at top. 



Ellis Corallines p. 10. tab 3. m g.f. b. K.. 



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

 at the bottom of the branches, furnished with alid. 



711. S. Myriophyllwn. . Branches leaning one way, : stem 

 gibbous on the side opposite the branches : denti- 

 cles appressed to the stem, all on the underside of 

 the branches, truncate. 



Ellis Coral, p. 14. tab. B, Saland. and Ellis Zooph. p. 44. n, 13. 



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

 united tubes, channelled and indented, with large protuberances 

 opposite fome of the branches: denticle s feated in a fo.cket*. with 

 ar-.short fpme on the low&r part. 



7 fey. S.falcata. Stem flexuous, with alternate pinnate 

 branches : denticles all on one side, imbricate, Kun... 

 cafe ; vesicles oblong-ovxtl. 



