THE INFUSORIA 



373 



Fio. 16. 



Oxytricha scutellum, 

 Cohn. Prepared speci- 

 men, showing numer- 

 ous fragments of the 

 meganucleus scattered 

 in the medulla. (After 

 Gruber.) 



Fio. 17. 



Oxytricha sciUellum, 

 Cohu. The fragments 

 having fused into a 

 single meganucleus, 

 this has again divided 

 into two nuclei antece- 

 dent to fission. (After 

 Gruber.) 



-M 

 M 



Fio. 19. 



Opalinopsis sepiolae, 

 Foett. x about 200, 

 to show the remark- 

 ably branched and 

 twisted meganucleus 

 (a, a). 



Fio. 18. 



Lacrymaria (Trachflocerca) phoenicop- 

 terus, Cohn, from a prepared specimen, 

 showing the meganucleus. M, M, frag- 

 mented into a large number of small 

 granules scattered through the proto- 

 plasm. (After Gruber.) 



Fio. 20. 



A preparation of an 

 undescribed species of 

 the Acinetarian genus 

 Ephelota, from the 

 Cape of Good Hope, to 

 show the ring-shaped 

 meganucleus, with 

 knob - like processes, 

 and the three minute 

 micronuclei. (Ori- 

 ginal.) Marine. '05 

 mm. across disc. 



Fio. 21. 



Ephelota (sp. ?), from a stained prepara- 

 tion of an individual with 16 buds, to show 

 the branching and anastomosing mega- 

 nucleus. Size about "5 mm. in length and 

 16 mm. across the disc. (From Ishi- 

 kawa.) 



