EXPLANATION OF PLATE XXVI. {continued). 



Fig, 

 31-32. Paramecium 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 ANODONTE, Ehr. sp., vol. ii. p. 490, X 200 (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 i,oo, X loo (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, Ouenn., 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). 



