F. Børgesen: List of species. 



429 



59. Penicillus Lamourouxii Decaisne. 



60. — pyrifonnis A. and E. S. Gepp. 



forma typica. 

 — explanata. 



61. — diimetosus Blainville. 



62. Udotea conglutinata (Ell. et Sol.) Lamx. 



63. — cyathiformis Decsne. 



64. — spinulosa Howe. 



65. — occidentalis A. and E. S. Gepp. 



66. — verticillosa A. and E. S. Gepp. 



67. — Flabellum (Ell. et Sol.) Howe. 



68. Halimeda Tuna (Ell. et Sol.) Lamx. 



— var. typica Barton. 



— var. platydisca (Decsne) Barton. 



69. — discoidea Decsne. 



var. typica Borgs. 



In the text p. 106 after the word ttjpica a"," through 

 misprint has fallen out. I regret the mistake having here- 

 with seemingly referred this variety to Dr. Howe. Comp. Dr. 

 Howe's remark regarding this matter in "Torreya", vol. 15, 

 1915 p. 48. 



var. platyloha Borgs. 



70. Halimeda Opuntia (L.) Lamx. 



71. — gracilis Harv. 



var. opuntioides Borgs. 



72. — incrassata (Ell. et Sol.) Lamx. 



var. typica Barton. 



f. gracilis Borgs, 

 var. monilis (Ell. et Sol.) Barton. 



f. robusta Borgs. 



f. cy lindrica Borgs, 

 var. simiilans (Howe) Borgs. 



73. Codium difforme Kütz. 



74. — tomentosum (Huds.) Stackh. 



75. — isthmocladum Vickers. 



76. — elongatum C. Ag. 



77. Bryopsis Duchassaingii J. Ag. 



