SPECIAL MORPHOLOGY AND TAXONOMY OF SARCODINA 325 



Faviihj 1. Labyrinthulidse, Haeckel.— This family is composed of 

 different species of the genus Luhyrinthula which are intracelhilar 

 parasites in diatoms, Vauchcria, Spirogyra, etc. They are ahvays 

 associated in groups or pseudoplasmodia and reproduce by division. 

 Each individual ma\' encyst to form a permanent spore-like resting 

 stage. Flagellated spores are unknown. 



Family 2. Zobsporidse, Zopf-Delage.— These forms are also 

 endoparasitic in diatoms, algpe, and various Protozoa, and have 

 filose, Heliozoa-like pseudopodia without axial filaments. They are 



Fig. 145. — Nuckaria ddicatula, quiescent and moving forms. (From Calkins.) 



distinguished by the formation of swarm spores. Protomonas 

 amyli, Cienkowsky, apparently lives only on starch grains. Typical 

 genera: Pseudospora, Cienkowsky, Protomonas, Cienkowsky, and 

 Protomy.va, Haeckel. 



Family 3. 'i^ampyrellidse, Doflein.— Here also the pseudopodia 

 are very delicate and frequently branch and anastomose and may 

 proceed from all sides of the body or be limited in origin to certain 

 regions. They are frequently parasitic on algse and Protozoa, some 

 forms having the ability to dissolve the cellulose membranes of 



