DEVELOPMENT OF HOLDFASTS OF FLORIDEA 261 
EXPLANATION OF PLATES XXI-XXIII. 
PLATE AX, 
Fig. 1. Rhabdonia tenera J. Ag., carpospore 9 hrs, after sowing. X 334. 
Fic. 2. R. tenera, 2 days old. X 334. 
Figs. 3-11. 2. tenera, from 4 to 17 days old. X 334. 
Fig. 12. Lomentaria uncinata Menegh., carpospore. X 334. 
Figs, 13-15, Z. uncinata, 6 days old. X 334. 
Fig. 16. L. uncinata, an unusually large specimen, 6 days old. X 213. 
Figs, 17-19. Champia parvula Harv., plantlet resulting from the ger- 
_ ‘Gination of a carpospore, 8 days old. xX 334. 
Fic. 20. C. parvula, holdfast of a plantlet growing on Polysiphonia. 
X 213. ' 
Fics, 21, 22, Lomentaria uncinata, bases of mature plants. 
Fig. 23, Chondria tenuissima (Good. et Wood) C. Ag., tetraspore shortly 
twas sown. X 233 
Figs. 24-28, ¢. tenutssima, plantlets developed from carpospores, from 
104 days old. x 233. 
Fig. 29, ¢. tenuissima, plantlet resulting from the germination of a tetra- 
Sore, 10 days old. x 233. 
—— Fie30, ¢ tenuissima found growing on mature Chondria. X 233. 
Figs, UE a tenuissima, 3 days old. X 233. 
Fig. 33. ¢ tenuissima, 
Fig, 34. C. tenuissima, 14 days old. X 213. 
Figs, 35, 
' 3. C, lenutssima, 5 days old. X 213. 
: “i 2 ‘enuissima, portion of mature holdfast, stained with methyl 
13. 
12 days old. X 213. 
Oa, C. tenuissima, holdfast of plants found growing on mature 
ined with methyl blue. x 333. 
4156. Polysiphonia violacea (Roth) Greville. 
ae Carpospore and plantlets from 1 to 5 days old. X 400. 
ntlet 7 days old. x 633. 
ee Figs, 5 : 
X too, 47, 48. Plantlets found growing on Scytosiphon lomentartus Ag. 
Ke 
ne aia’ lantlet, result of germinating carpospore. X 213. 
96. Ends of primary rhizoids of plantlets 12 days old. X 400. 
