EXPLANATION OF PLATE XXVII. (continued). 

 FIG. 



36. PHIALINA VERMICULARIS, Ehr., vol. ii. p. 519, x 200 (Ehrenberg). 



37. PHIALINA VIRIDIS, Ehr., vol. ii. p. 519, x 200 (Ehrenberg). 



38. TRACHELIUS OVUM, Ehr., vol. ii. p. 522, x 80. 



39,40. AMPHILEPTUS ANSER, Ehr., vol. ii. p. 525, x 120 (Ehrenberg). 



41-44. CHCENIA TERES, Duj. sp., vol. ii. p. 521. 41, 42, Animalcule in a contracted 

 and extended condition as observed by author, X 200 ; 43, 44, oral region 

 in its expanded and contracted states as delineated by Quennerstedt ; i in 

 Fig. 44 represents an ingested food-particle. 



45, 46. AMPHILEPTUS MELEAGRIS, Ehr. sp., vol. ii. p. 526. 45, Adult animalcule, 

 x 100 (Ehrenberg) ; 46, showing at a an example which has affixed itself to 

 and become encysted upon the branching pedicle of a Zoothamnium, the 

 former occupant of which it has first devoured (after D'Udekem). 



.47. TRICHODA PURA, Ehr., vol. ii. p. 535, x 700. 



48. MENISCOSTOMUM STOMOPTYCHA, Ehr. sp., vol. ii. p.'$39, x 200 (Eckhard). 



49. COLPIDIUM CUCULLUS, Schrank sp., vol. ii. p. 537, X 200. 



50, 51. PLAGIOPYLA NASUTA (?) Stein, vol. ii. p. 538. Lateral and ventral aspects, 

 x 200 (Quennerstedt). 



52. LOXOPHYLLUM MELEAGRIS, Ehr. sp., vol. ii. p. 528, x no (Wrzesniowski). 



53. LOXOPHYLLUM ARMATUM, C. & L., vol. ii. p. 529, x 150 (Clap. & Lach.) 



54. LEMBADION BULLINUM, Perty, vol. ii. p. 537, x 200. m, Undulating membrane 



(Clap. & Lach.). 



55. PLEURONEMA CHRYSALIS, Ehr. sp., vol. ii. p. 543, x 250. 



56. PLEURONEMA CORONATA, S. K., vol. ii. p. 544, x 200. 



57,58. CYCLIDIUM GLAUCOMA, Ehr., vol. ii. p. 544. 57, Normal zooid, x 600; 58, 

 immature example, being as yet deficient of the oral membrane that dis- 

 tinguishes the adult type. 



59, CYCLIDIUM CITRELLUS, Cohn. sp., vol. ii. p. 545 x 300 (Cohn). 



i. URONEMA MARINA, Duj., vol. ii. p. 546. 60, Adult, and 61, immature examples, 



x 600. 

 62, . j. LEMBUS VELIFER, Cohn, vol. ii. p. 547. 62, Adult, and 63, immature example, 



x 400 (Cohn). 

 64. BjEONlDlUM REMIGENS, Perty, vol. ii. p. 546, x 350 (Fresenius). 



65, 650. PROBOSCELLA VERMINA, Mull, sp., vol. ii. p. 549. 65, Example as observed 



and delineated by the author, x 500 ; 6$a, illustration of apparently the 

 same species as given in Miiller's 'Animalcula Infusoria,' tab. viii. fig. i, 

 1786. 



66, 67. LEMBUS SUBULATUS, S. K., vol. ii. p. 548, x 700. 



68. AMPHILEPTUS GIGAS, C. & L., vol. ii. p. 526. Attenuate variety, having the 

 contractile vesicles disposed in linear order along the dorsal border, 

 X loo ; tr, trichocysts (Wrzesniowski). 



