EXPLANATION OF PLATE XXVI. (continued). 



FIG. 



31-32. PARAM^ECIUM BURSARIA, Ehr. sp., vol. ii. p. 486. Dorsal and ventral aspects 

 X 250. The arrows in each case indicate the direction of the endoplasmic 

 current or cyclosis. 



33. CONCHOPHTHIRUS ANODONTjE, Ehr. sp., vol. ii. p. 490, x 2oo (Engelmann). 

 34, 35. CONCHOPHTHIRUS STEENSTRUPII, Stein, vol. ii. p. 490. Ventral and lateral 

 aspects, x 200 (Quennerstedt). 



36. PRORODON NIVEUS, Ehr., vol. ii. p. 492, x 75 (Ehrenberg). 



37. CYRTOSTOMUM LEUCAS, Ehr. sp., vol. ii. p. 497, x 150 (Ehrenberg). 



38. ISOTRICHA MICROSTOMUM, C. & L. sp., vol. ii. p. 498, X 250 (Clap. & Lach.). 



39, 40. PLACUS STRIATUS, Cohn, vol. ii. p. 490. Ventral and lateral aspects, x 450 

 (Cohn). 



41. NASSULA AMBIGUA, Stein, vol. ii. p. 495, x 200 (Stein). 



42. NASSULA ORNATA, Ehr., vol. ii. p. 494, x 100 (Ehrenberg). 



43. PRORODON EDENTATUS, C. & L., vol. ii. p. 493, x 260 (Clap. & Lach.). 



44. PRORODON MARGARITIFER, C. & L., vol. ii. p. 493, x 120 (Clap. & Lach.). 



45. HOLOPHRYA OVUM, Ehr., vol. ii. p. 498, x 200 (Clap. & Lach.). 



46. HOLOPHRYA LATERALIS, S. K., vol. ii. p 500, x 100 (Carter). 



47. LOXOCEPHALUS GRANULOSUS, S. K., vol. ii. p. 489, X 300. 



48. CHASMATOSTOMA RENIFORME, Eng., vol. ii. p. 540, x 200 (Engelmann). 



49. PRORODON NIVEUS, Ehr., vol. ii. p. 492. Pharyngeal rod-fascicle, x 120 



(Ehrenberg). 



50. NASSULA ORNATA, vol. ii. p. 494. Pharyngeal rod-fascicle, x 200 (Ehrenberg). 



51-53. ENCHELYODON FARCTUS, C. & L., vol. ii. p. 503. 51, Extended, 52, contracted 

 states, x 120; 53, contractile vesicle at full diastole, with its lateral sinuses 

 and at a central pore-like opening (Wrzesniowski). 



54. HELICOSTOMA OBLONGA, Cohn., vol. ii. p. 501, x 150 (Cohn). 



55-58. OTOSTOMA CARTERI, S. K., vol. ii. p. 500. 55 and 56, Adult animalcules, that at 



56 showing the band-like endoplast and stellate contractile vesicles, x 100; 



57 and 58, successive phases of subdivision into sporular elements (Carter). 



59, 60. HOLOPHRYA TARDA, Quenn., vol. ii. p. 499. Extended and contracted states, 



x 200 (Quennerstedt). 

 61, 62. TRACHELOPHYLLUM APICULATUM, Perty sp., vol. ii. p. 502. Extended and 



contracted states, x 200 (Wrzesniowski). 



63, 64. OPHRYOGLENA ATRA, Ehr., vol. ii. p. 532. Lateral and ventral views, x 200 

 (Ehrenberg). 



65, 66. PANOPHRYS FLAVICANS, Ehr. sp., vol. ii. p. 534. Ventral and lateral views, 

 x 150 (Ehrenberg). 



67, 68. CYCLOTRICHA CITREUM, C. & L. sp., vol. ii. p. 535. Lateral and ventral 

 aspects, x 230 (Clap. & Lach.). 



69. PLAGIOPYLA (?) CARTERI, S. K., vol. ii. p. 538, x 100. 



70. PLAGIOPYLA (?) FUSCA, Quenn. sp., vol. ii. p. 539, x 150 (Quennerstedt). 



