178 MINNESOTA BOTANICAL STUDIES. 



Mention is again made of the genus by J. Agardh in 1876.* 

 He had seen specimens of C. rosa-marina from the Museum of 

 St. Petersburg and also a plant from Californian shores which 

 he referred to C. sitchensis; but on account of inability to 

 satisfy himself as to the structure of the fruiting bodies he based 

 his descriptions upon those of Postels and Ruprecht. 



In 1885 Constantinea thiebauti was described by Bornetf from 

 a single specimen collected at Majunga on the north coast of 

 Madagascar. Bornet very properly calls attention to the re- 

 markable range which 'this genus, with the addition of his new 

 species would enjoy : C. rosa-marina and C. sitchensis in arctic 

 seas, C. reniformis in the deep waters of the Mediterranean and 

 C. thiebauti in the tropical waters of the Indian ocean. 



In 1891 there appeared in the Botanical Magazine of Tokyo 

 "Remarks on some algae from Hokkaido "$ in which Con- 

 stantinea sitchensis Post, and Rupr. (?) is mentioned, but the 

 position of the described plants in the genus Constantinea is ad- 

 mitted to be doubtful. 



In "Die Natiirlichen Pflanzenf amilien " the genus under- 

 goes rearrangement. C. reniformis is restored to the genus 

 Neurocaulon of Zanardini, where probably should also be placed 

 Bornet's C. thiebauti. The reproductive bodies, as well as the 

 vegetative structure of C. rosa-marina and JV. foliosum, had 

 been studied personally by Schmitz.|| The classification of 

 Schmitz and Hauptfleisch includes under Constantinea the species 

 C. sitchensis and C. rosa-marina and under Netirocaulon the 

 single species N.foliosum. I have no certain knowledge as to 

 whether Schmitz had or had not in possession any material of 

 C. sitchensis. 



Collection. In August, 1897, and again in the summer of 

 1898 collections of a species of Constantinea, reported as C. 

 sitchensis^ were made by Miss Josephine E. Tilden, and it is 

 upon this material that the following observations are based : 



On August 3, 1897, specimens of C. sitchensis were found 



* Agardh, J. Spec. Alg. 3 : 225. 1876. 



t Bornet. Alg. de Mad. Bull. Soc. Bot. de France 32 : 18. / /. 2. 1885. 



JOkamura, R. Remarks on some algae fron Hokkaido. Bot. Mag. Tokyo. 

 5= 333-336- 1891. 



Schmitz and Hauptfleisch. Nat. Pflanz. I. Teil. Abt. 2: 517, 519, 520, 525. 

 1897. 



II Schmitz. Sys. Ubers. der bisher bekannten Gattungen der Florideen. Flora 

 72 : 436. 1889. 



