344 156 



Fig. 3. Metopidia lepadella seen ventrally. Obj. hom. Im. Orthosc. Oc. 



4. Euchlanis lyra seen ventrally. Obj. hom. Im. Oc. 6 



5. — dilatata T seen dorsally. Obj. 4. Oc. 4 



6. Asplanchna priodonta. Fig. 6 a the newlj' born young one with great I 



amount of store nutriment. Fig. 6b the same animal live days / Obj. 4. Oc. 6 



later; larger, and with reduced store nutriment J 



Tab. VI. 



Fig. 1. Microcodides robustus seen dorsally. Obj. 4. Oc. 6 



2. — seen laterally. Obj; 4. Oc. 6 



3. Gastropus hyptopus seen laterally. Obj. hom. Im. Oc. 6 



4. — seen dorsally. Obj. 4. Oc. 6 



5. — Penis extruded Obj. hom. Im. Oc. G 



6. Asplanchna priodonta. Penis extruded; phase 1 Obj. 4. Oc. 6 



- 7. — — phase 2 Obj. 4. Oc. 6 



Tab. VII. 



Fig. 1. Asplanclma priodonta seen dorsalh'. Obj. Waterim. Oc. 4 



2. — Brightwelli seen laterally. Obj. Waterim. Oc. 6 



3. — Sieboldi seen laterally. Obj. Waterim. Oc. 4 



4. — amphora seen laterally. Obj. Waterim. Oc. 6 



Tab. VIII. 



Fig. 1. Hydatina senta seen dorsally. Obj. hom. Im. Oc. 6 



seen ventrally. Obj. hom. Im. Oc. 6 



Tab. IX. 



Fig. 1. Hj'datina senta seen laterally. Obj. hom. Im. Oc. 6 



- 2. — female egg Obj. 16. Oc. 4 



- 3. — male egg Obj. 16. Oc. 4 



4. — resting egg Obj. 16. Oc. 4 



5. — A piece of alsæ carpet with the three sorts of eggs 1 „, . , ^ „ 



; Obj. 4. Oc. 2 

 and some males; seen from below ) 



6. — the same seen laterally. Obj. 4. Oc. 2 



7. Proales parasita Male 



8 — 15 demonstrates the variation in form of the female, after having^ „. . . ^ 



J Obj. 4. Oc. 4 

 pierced an Uroglena colony; 8 and 9 freeswimming stages. . . ) 



Tab. X. 



Fig. 1. Rliinops vitrea seen ventralh'. Obj. hom. Im. Oc. 6 



2. — seen laterally. Obj. hom. Im. Oc. 6 



3. Hydatina senta. Penis extruded phase I Obj. 4. Oc. 6 



- 4. — — phase 2 Obj. 4. Oc. 6 



5. Notops brachionus seen dorsally Obj. 16. Oc. 6 



6. — seen laterally. Obj. 16. Oc. 6 



Tab. XI. 

 Fig. 1. Brachionus pala seen dorsally. Obj. hom. Im. Oc. 6 



- 2. — seen laterally. Obj. hom. Im. Oc. 6 



