133 



■(8) It is iKTiMiiiial mill rvcii stratose, /. <'., forms a siiccessinii of layers of pores. 

 Specimens from Soiitli Carolina and Indiana I'xhihit tlu' latter condition. Tlie 

 ■sjiecies h;is lioen rcyardcd as the tvpe of a distinct genus, Ganoderma. It is possi- 

 ble that ilu' snpposi'd variations rejjresent incijiient Jind, j)erhaps, distinct species, 

 yci tile groui> in wliich tlu' sjiecies occurs thoroughly defies all exact classifica- 

 Uon, a single spccii's often in its variations overreaching generic and even family 

 limitations. 



The I'koi'Osed Nkw .Systematic IJotanv ok Norui America. liy T.. M. 



iNDERWdoD. 



[Al'.STRACT.] 



Aniionnccinciit of a new tlora ol North America, to In- the C()ml)ined work of 

 the leading hotanists of the conntry. lOach group is to lie monographed hy spe- 

 vialists. The work is to consist of seventeen volumes octavo, of about 500 pages 

 ^ach and to hi' issued in parts. Separate parts of the work will also be obtainable, 

 hut at an advanced ])rici'. 



Cell, Strccture of Cyanophyce.e. By Geo. W. Martin. 



Contrihiitions on the cell structure of aU/ir plants have hy no means reached a 

 iMnsiderahle degree either in point of number or in scientific results. Research 

 in this line is comparatively an untried field; es))ecially does it obtain in reference 

 to the class of algse known as the Cyanophycen . 



During the past summer the writer had an opportunity of studying marine as 

 well as terrestrial forms of a nuiuiier of species. Work was undertaken, chiefly, 

 to discover, if possible, by use of various reagents, any method that might lead to 

 the identification of constituent and structural parts eoinposing the cell. The 

 following is a brief resumr of the results obtained : 



Chromatophore. It apjiears to consist of colored bodies, so-called "grana," 

 viiibedded in a homogeneous, colorless, ground substance. The grana are bound 

 together by a connecting substance into a moniliform, or necklace-like fibrillac. 

 These are denser near the surface and run more or less spirally around the cell. 

 Just here may be mentioned the fact that the fibrillar arrangement of the grana 

 is denied by Pa 11 a. 



In all eases observed, the chromatophore is parietal and continuous, and is 

 t-eparated from the wall by a delicate layer of protoplasm. In .several instances it 

 ^ippeared to be vacu<date. 



