8 MINNESOTA BOTANICAL STUDIES. 



Laminariacese. Mucilage canals do not occur. No cryptosto- 

 mata were seen. 



BIBLIOGRAPHY. 



1. Turner. Hist. Fucorum, 1 : 57. T. 27. 1808. 



2. Agardh. Sp. Alg. i : 49. 1823 and Syst. Alg. 293. 1824. 



3. Agardh. Rev. Macr. 313. 1829. 



4. Areschoug. Bot. Notiser, 66. 1876. 



5. Agardh, J. G. Sp. Gen. et Ord. Alg. i : 254. 1848. 

 Kiitzing. Sp. Alg. 592. 1849. 



Ruprecht. Pfl. aus dem Nord. Th. Stillen Oceans, in Mem. de 

 1'Acad. de St. Petersb. Sc. Nat. 7: 70. T. IV. 1852. 



Harvey. Nereis Bor. Am. 62. T. 3. 1858. 



Kiitzing. Tab. Phycol. 10 : 10. T. 24. 1860. 



Areschoug. Observ. Phycol. Fasc. V. 3. 1884. 



Kjellman. Engler and Prantl, Nat. Pfl. Fam. I. 2 : 247, 260- 

 1893. 



De Toni. Syl. Alg. 3 : 373. 1895. 



6. Harvey. Hook, and Arnott, Bot. Beechey's Voyage, 163. 1833. 



7. Harvey. Journ. Linn. Soc. Bot. 6: 164. 1862. 



8. Setchell. Erythea, 4: 43. 1896. 



9. Setchell. Trans. Conn. Acad. 9: 337. 1893. 



10. MacMillan. Bull. Torr. Bot. Club, 26: 273. 1899. 



11. MacMillan. Bot. Gaz. 30: 318. 1900. 



12. Wille. Physiol. Anat. der Laminariaceen, 52. 1897. 



EXPLANATION OF PLATES. 



Plate I. The beach at low tide, Vancouver Island, at Minnesota 

 Seaside Station. A large plant of Egregia is near the foreground ; 

 just back of it is placed a hat for comparison as to size. The plant is 

 seen to consist in great part of very long strap-shaped branches with 

 thousands of small proliferations along the sides. The plants in the 

 foreground at the left are species of Alaria, those near the edge of the 

 water in the background are Lessonia. Photographed by Hibbard. 



Plate II. Photographs of young Egregia plants showing well the 

 differences between rachis and lamina. Numerous vesicles may be 

 seen on the rachis. These are the swollen bases of otherwise ordinary 

 proliferations. Many of the proliferations of the lamina have been 

 torn off. This is a common occurrence. These figures are about one 

 half natural size. Photographed by Hibbard. 



Plate III. i-io. Proliferations of the lamina, i-c;. Common forms. 

 6, 7, 8. Forms occasionally met with. 9, 10. Forms somewhat 

 numerous on old fronds. 11-27. Proliferations of the stipe. 11-17. 

 Very common forms; those with vesicles (13-17) are not otherwise 



