-WORMS. 20OPHYTA. 78. Sertularia. 215 



Stem hard, blackish, compofed of fmall united tubes : branches 

 lanceolate, brown : denticles truncate, slightly pointed on one side. 



-"24. S. Filicula. Stem zigzag, with alternate branches : 

 denticles opposite, ovate, with a single erect one 

 at the junctures of the branches : vesicles obovate, 

 with a tube in the centre. 



Ssland. and Ellis Zooph. p. 57. n. 32. tab. 6.f. c. C. 



Very tender,- much branched ; the branches nearly horizontal. 



725. S. Evamii. Branches opposite : denticles shorf, 

 opposite : vesicles lobed, arising from opposite bran- 

 ches, which proceed from the creeping adhering 

 tube. 



Soland. and Ellis Zooph p. 58. n. 44. 



Creeping on Fuci, about 2 inches high, very slender, bright 

 yellow: vesicles fulvous, with opposite lobes. 



-726. S. muricata. Stem jointed, interwoven at bottom: A 

 denticles pedicelled, proceeding alternately from the . 

 joints : vesicles pedicelled, oval, spinous. 



Solander and Ellis Zooph. p. 59. K. 36. tab. j.f. 3. 4. 



Vesicles full of pointed fpines from arched crested ribs. 



721. S. Uva. Slightly branched, with alternate divisions : 

 denticles obsolete : vesicles oval, closed, clus- 

 tered. 



Ellis Corallines, p. 27. n. 25. tab. \$.f. c. C. 

 I'escicles tranfparent, with a white nucleus. 



'728. - S. Icndigera. Siem and branches jointed : denti- 

 cles cylindrical, truncate, in a single row along the 

 branches and growing gradually less. 



Ellis Corallines p. 27. n. 24. tab. 15. f b. B. 



Brandies fubdivided and irregularly interwoven : denticles placed 

 in parallel ranks along the inside of the branches, and growing 

 gradually shorter towards the tops of thejoints : vesicles unknown. 



729. S. geniculata. Stem branched, jointed, flexuous : 

 denticles twisted, alternate, at the base of the vesicles: 

 vesicles obovate, with a tube in the centre. 



Ellis Corallines p. 22. n. 19. tab. 12 f. b. B. 

 - Creeping up Fuci : joints clavate at top. 



'730. S. dichotoma. Stem dichotomous, flexuous, twisted 

 at the joints : denticles campanulate, on annulate 

 -stalks: vesicles obovate, axillary, on twisted pedi- 

 cels. 



Ellis Corahp. 21. n. 18. tab. 12. /. a. A. c. C. 



Near a foot long, tough, pliant, white, but becoming testaceous 

 by age. 



731. S. spinosa. Branches forked, ending in spinous 

 points : denticles distant, on the same side 9 obsolete : 

 vesicles linear-oval. 



Ellis Corallines p. 20. n. 17. tab. 11. /. b. d. 'B. C. D. 



Stems compofed of interwoven tubular fibres : 'branches flexuous, 

 loofe, forked, with pointed tips. 



732. $..pinnata Stem simple, lanceolate, pinnate : denti- y 

 cles campanulate, all on one side : vesicles oval, 

 clustered, with a coronet of tubercles round the 

 mouth. 



Ellis. Corallines, p, 19, n 16, tab. u./ a, A 



