F. Børgesen: List of species. 443 



species, representing two genera of the same family, and that, 

 in spite of the confusion entailed, this specific name was avail- 

 able and vahd in each of these two related genera, — a practice 

 that is possibly permissible under the »Vienna Rules« but is dis- 

 tinctly forbidden by the »American Code«. In this particular 

 case, the present reviewer has enjoyed the privilege of seeing 

 the specimens of Dictyota variegata Lamour. in Lamouroux's 

 herbarium at Caen and finds that they agree with the figures 

 pubhshed by Lamouroux in showing only a Zonaria (the Gymno- 

 sorus variegatus of J. Agardh), so that the name »Padina varie- 

 gata (Lamx.) Hauck«, employed by Borgesen would seem to be 

 vulnerable on the ground of historical fact as well as on the ground 

 of nomenclature theory.« 



To this I wish to remark that, when working out my paper, 

 I had no access to the original specimens of Lamouroux, the ex- 

 amination of which was the necessary starting point for an even- 

 tual change of name for one of the plants in question, the figure 

 of Lamouroux being such, that even if it shows perhaps most hke- 

 ness to Zonaria variegata this, nevertheless, cannot be stated with 

 absolute certainty. Therefore I followed the practice of Hauck. 

 But now, when Dr. Howe has examined the original specimens 

 of Lamouroux, the case is different. The plant, named Padina 

 variegata uptill now, must be given a new specific name and in 

 honour of Dr. Howe, who has solved the question, I propose 

 to call it Padina Hoiceana. 



27. Dictyota Bartayresiana Lamx. 



28. — linearis (Ag.) Grev. 



29. — volubilis Kiitz! 



30. — pardalis Kiitz. 



31. — Indica Sonder. 



32. — ciliata J. Ag. 



33. — crenulata J. Ag. 



34. — dentata Lamx, 



35. Dilophiis alternans J. Ag. 



36. — Cruineensis (Kiitz.) J. Ag. 



37. Dictyopteris delicatula Lamx. 



38. — plagiogramma (Mont.) Vickers. 



39. — Justii Lamx. 



