-'WORMS. 200PHYTA. 78. Sertularia. 215 



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

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



724.- 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. 



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



Very tender, much branched ; the branches nearly horizontal. 



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

 opposite : vesicles lobed, arisiug 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: 

 denticles pedicelled, proceeding alternately from the 

 joints : vesicles pedicelled, oval, spinous. 



Solander and Ellis Zooph. p. 59. n. 36. tab. y.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. 15./. c. C. 

 Vescicles transparent, with awhite nucleus. 



128. S.lendigera. Stem 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./. b.-B. 



Branches fubdivided and irregularly interwoven: denticles placed 

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

 gradually shorter towards the tops of the joints : 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 /. 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 Coral, p. 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, obsolete : 

 vesicles linear-oval. 



Ellis Corallines p. 20. n. 17. tab. 11. f. b. d.* B. C. D. 



Stems compofed of interwoventubula-r fibres : branches flexuous, 

 loofe, forked, with pointed tips. 



732. S. pinnata Stem simple, lanceolate, pinnate : denti- 

 cles campanulate, all on one side : vesicles oval, 

 clustered, with a coronet of tubercles round the 

 mouth. 



Ellis* Corallines, p. 19. n t 16. tab-, 11./. a, A» 



