МЕ. 0. MURRAY ON NEW SPECIES OF CAULERPA. 213 
brown colour, and the pinnz а vivid green. The species is exceedingly handsome, and 
one is tempted to think it must have a limited range. Тһе Florida Keys have been 
examined by so many thoroughly expert phycologists from Harvey downwards that a 
plant of its size and striking appearance can hardly have been overlooked. The same 
is true of several of the Antilles, notably Guadeloupe. It reminds one that the 
mainland coast of the Caribbean Sea from Yucatan round to La Guayra has never been 
properly examined, and affords the phycologist a pleasing anticipation of the results of 
such an exploration. 
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DESCRIPTION OF THE PLATES. 
PLATE LII. 
. Caulerpa Holmesiana. а. Nat. size. b. A branch, x 3. с. Tip of pinna. 
Caulerpa Holmesiana. а. Transverse section of stalk, x 25. 0. Longit. section, x 50. 
Caulerpa ligulata. а. Nat.size. 6. Longit. section through annulate stalk, x 95. 
. Annulate basal cell of Struvea plumosa. Nat. size. 
. Basal cell and branches of Apjohnia rugulosa. х 8. 
Caulerpa cactoides, showing annulate stalk. Маф. size. 
Caulerpa cactoides. a. Transverse section through stalk, x 15. 6. Longit. section through 
stalk, x 15. 
. Caulerpa cactoides, var. gracilis, showing annulate stalk and surculus. Nat. size. 
Prate LIII. 
. Caulerpa Fergusonii. Nat. size. 
. Caulerpa Fergusonii, section through surculus (much compressed). х 15. 
Caulerpa phyllaphlaston. Nat. size. | 
Caulerpa phyllaphiaston. Unilateral pinne. х 12. 
. Сашегра phyllaphlaston. Transverse section through surculus, showing а double wall оп опе 
side (the cross-beams from the outer perforate the inner wall). It is possible that the space 
between the walls has been produced by the disintegration of a portion of the wall; there 
occurs in it a yellowish gummy substance, х 20. 
Caulerpa phyllaphlaston. Longit. section through stalk. х 20. 
