119 



SPECIAL PART. 



A. ALG^E. 



Plantce aquaticae acotyledone<& guttatim submucosa, granuloscs 

 floccosce, gelatinosce, membranacece vel coriaceae ; filamentosce vel 

 tandem foliosa ; olivacete purpurece virides leucophoece, albicantes 

 vel raro achromaticae ; cettulares ; cellulis minutissimus isolatis, vel 

 filamentose aut floccose articulatis, aut in fills cum muco aggregatis 

 vel tubulosis et continuis vel articulatis-prosenchymaticis vel paren- 

 chymaticis formatce. Sporidia nulla in minimis unicellularibus, holo 

 vel partim gonimicis, aut in pericarpiis inclusa aut superficei in- 

 spersa. Qutedam dioicae. 



1. Sporidia cellula unica immota vel ciliis moventia (zoopora). 



2. Spermatozoidia numerosa ex cellula unica " in antheridiis in- 

 clusa dein libere moventia. 33 Kiitzing. 



The vegetative system, which, in other plants, consists of " phy- 

 coma" is the vegetative system in general ; " cauloma" the stem, 

 and (C phylloma" the branch, is represented in the Algae by the 

 " cceloma," or tubus, and " trichoma," or filamentum. The para- 

 sitic Algse found upon living animals consist of cylindrical or 

 flattened filaments, single or branched, frequently with dissepi- 

 ments, or apparently articulated at certain distances, and con- 

 taining greenish or grayish molecular granulations in varying 

 quantities. Each of these granular masses is called a te gonidium" 

 whilst the granulated cell-contents is called the " endochrome." 

 The tribes of these Algae have no special apparatus for fixing 

 them in the mucus of the affected animal, but they are held firm 

 by the crossing of the fibres. 



The reproductive system consists of the sporangium and the 

 spores. 



The sporangium, conceptacle, or spore- case, is the organ in 

 which the spores originate, are developed, and enclosed. It is 

 formed from a variously shaped vesicle, which is universally of 

 larger size than the cells of the vegetative system, and originates 



