OF ARTS AND SCIENCES. 359 



87. EcTOCARPUS HooPERi, Harv. (?) Greenport, L.I. 



88. EcTOCAUPUS DiETZi.E, Harv (?) Greenport. L.I. 



The last four species seem to have been founded by Harvey on 

 single or infertile specimens, a mode of proceeding against which he 

 carefully warned others. An examination of the authentic specimens 

 in the Herbarium of Trinity College, Dublin, convinced me that it 

 would be next to impossible to recognize the two last-named species. 

 Specimens distributed by American collectors under any of the names 

 in question should be regarded with great suspicion. 



RHODOSPERM^. 



The older name Floridece of Agardh should be restored to this very 

 natural group, which, since the discovery by MM. Thuret and Bornet 

 of their mode of fertilization (vid. Ann. des Sciences Nat. 5 serie, 

 t. 7), must be considered the most highly organized of the algas. 



RHODOMELACE^. 



89. Amansia multifida, Lmx. Key West. 



Odonthalia dentata, Lyngb. Halifax, N.S. — Probably occurs on 

 the coast of Maine. 

 *90. Odonthalia aleutica, Ag. Oregon. 

 *91. Odonthalia Lyallii, Harv. Vancouver's Island. 



92. Alsidium Blodgettii, Harv. North Carolina, 3Ir. Forbes ; 

 and southward. 



93. Alsidiuji (Bryothamnion, Ag. Spec.) triangulare, Ag. 

 Key West. 



*94:. Bryothamnion Seaforthii, Ag. Florida, Dr. E. Palmer ; 

 West Indies. 



95. Acanthophora Thierii, Lmx. Florida. 



96. Acanthophora Delilei, Lmx. Florida. 



*97. Acanthophora muscoides, Ag. Florida, Dr. E. Palmer. 



98. Chondria (Chondriopsis, Ag. Spec. Alg ) dasyphylla, Ag. 

 Cape Cod southward. 



99. Chondria striolata, Ag. (inc. C. Baileyana, Mont.) Cape 

 Cod southward. 



100. Chondria TENUissiMA, Ag. Long Island Sound; Boston? 



101. Chondria LiTTORALis, Haiv. Wood's Hole, Mass., IK G'. i^. / 

 Florida. 



102. Chondria atropurpurea, Harv. Charleston, S.C, south- 

 ward ; California ! 



