86 BURMA, ITS PEOPLE AND PRODUCTIONS. 



A. GLABRA, Hook. Ti'co FcTDs. Mountaiiious districts. 



A. CONTAMINANT, Wall. Tree Ferns. Mouutainous districts. 



A. coMOSA, Hook. Tree Fenis. Mountainous distiicts. Near Teemibong, 



ascent of Moolee-it. 

 A. AiBOSETACEA, Beddomc, Suppl. Ferns B. India. Nicobars, Kurz. 



Sub-order YI. GLEICEENIACE^. 



Gleichenia, Smith. 



G. DicHOTOMA, Willd. Frequent. Eoad to Kulween, Mcrgui. Amherst Cliff. 

 G. LONGissiMA, Bl. Mountains. Nattoung. 



Order MAR.iTTIACEJE. 



AsGiorTEEis, Hoffm. 

 A. EVECTA, Hofim. Wet jungles, Toung-wiue, near Maulmain. 



The following brief account of the classification of ""the Acotyledonous orders 

 is condensed from Maout and Decaisne's work, the arrangement of the Algte spuiisB 

 being by Sir J. D. Hooker. 



Class THALLOGENS. 



Order ALGiE. 



Algce spuripo are divided into five Tribes. 



CHYTTOCOCCIEJE. 



Tliese orfianisms are minute colourless ylohdes found in vinegar and other Jiuids, and 

 are 2>robally only mi/celia of certain fungi. 



VOL rOCINIEJE. 



Minute fresh-water Algee consisting of a number of 2)ermanenthj actirc zoosjmre-Iike 

 bodies, associated in various forms, and surrounded by a gelatinous coat, tcith or without 

 an enveloping membrane. 



This order embraces tliree genera, Volro.r, StepJianosphcera and Gonium. Volvox 

 is a pale greenish globule one-fiftieth of an inch in diameter. It consists of a 

 membranous sac, studded with gi'een points, and clothed with innumerable cilia. It 

 is found in ponds and is in a state of constantly rolling motion. 'J he green points 

 consist of layers of ^r)o.s/;orf-like bodies, coating the inside of the sac, with two cilia 

 which project through the holes in the sac, and are further provided with delicate 

 filaments, that extend from their sides and meet .similar filaments, from the adjoining 

 bodies. The zoospores are pyriform, have a reddish eye spot, and transparent con- 

 tractile vacuole. Young Volroxes occupy the centre of the sphere. Stephanospheera 

 has eight biciliated green cells placed at equal distances along the equator of a 

 sphoi-ical cell. Gonium presents a flat fi'ond of about sixteen cells. They display 

 two fo;'ms of cells, an active and passive, the former having each a pair of vibratile 

 cilia projecting through their hyaline envelope. 



PALMELLACIEJE. 



Gelatinous or poicdery crusts found on damp surfaces, and in fresh or salt water, 

 composed of globular and elliptic cells aggregated in a gelatinous matrix. Reproduction 

 bg cell-division and ciliated zoospores. 



This tribe embraces six genera — Chlorococcus, Pahnella, Protococcus, Trgpothallus, 

 Glmocapsa, and Uormospora. Pahnella cruenfafa forms rose-coloui-ed patches on damp 

 walls. Protococcus nivalis is the celebrated red-snow of Arctic and Alpine regions. 

 Protococcus includes various unicellular Pahnellacica:, which increase by division into 

 two or four parts, which separate, but are connected by a semigelatinous layer. 

 Sometimes its cells give rise to four-ciliated zoospores of two sizes, the larger of 



