PLATE XX VII . 



EXPLANATION, 

 Fig. 



1. Urotricha lagenula, Ehr. sp., vol. ii. p. 505, x 300. 



2. Urotricha farcta, C. & L., vol. ii. p. 505, x 350 (ClaparMe & Lachmann). 



3, 4. CoLEPS HIRTUS, Ehr., vol. ii. p. 506. — 3, Adult animalcule, X 400 ; 4, example 

 dividing by transverse fission. 



5. COLEPS FUSUS, C. & L., vol. ii. p. 507, X 350 (Clap. & Lach.). 



6. COLEPS UNCINATUS, C. & L., vol. ii. p. 507, X 350 (Clap. & Lach.). 



7. PlagiopOGON COLEPS, Ehr. sp., vol. ii. p. 508, X 250 (Perty). 



8-10. POLYKRIKOS SCHWARTZil, Butschh, vol. ii. p. 508.— 8, Adult example, x 200 ; 

 9 and 10, supposed trichocysts with thread-like filament in the retracted and 

 extended states, X 600 (Biitschli). 



11-13. Metacystis truncata, Cohn, vol. ii. p. 511.— 11 and 12.— Adult examples, x 

 400 ; young zooids as yet devoid of transverse annulation (Cohn). 



14. Enchelys arcuata, C. & L., vol. ii. p. 510, x 300 (Clap. & Lach.). 



15. Enchelys farcimen, Ehr., vol, ii. p. 510, x 600. 



16, 17. Anophrys SARCOPHAGA, Cohn, vol. ii. p. 512, x 400 (Cohn). 



18. Perispira ovum (?) Stein, vol. ii. p. 511. — Dimensions unrecorded (Carter). 



19-23. COLPODA CUCULLUS, Ehr., vol. ii. p. 5 12. — 19, Adult animalcule, x 200; 20-23, 

 mucous phases of encystment and sporular mode of multiplication (Stein). 



24. COLPODA PIGERRIMA, Cohn, vol. ii. p. 513, X 600 (Cohn). 



25-27. Lacrymaria Cohnii, S. K., vol. ii. p. 518. — At 25 example with the body 

 contorted into a screw-like form, x 250 ; at 27 an animalcule spherically 

 contracted (Cohn), 



28. Lacrymaria coronata, C. & L., vol. ii, p, 518. — The distal extremity only 

 showing the double ciliary wreath, x 350 (Clap. «& Lach.). 



29-31. Trachelocerca OLOR, Miiller sp., vol. ii. p. 515. — 29 and 31, Adult animalcules, 

 X 300 ; 30, distal extremity more highly magnified, displaying oral 

 structure. 



32. Trachelocerca phcenicopterus, Cohn, vol. ii. p. 516, x 300 (Cohn). 



33. Trachelocerca versatilis, MUll. sp., vol. ii. p. 516, x 200. 



34. Lacrymaria lagenula, C. & L., vol. ii. p. 517, x 350 (Clap. & Lach.). 



35. Lagynus elegans, Eng. sp., vol. ii. p. 521, x 300 (Engelmann). 



