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.'539, 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 iio (Wrzcsniowski). 



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



54. Lembadion bullinum, Perty, vol. ii. p. 537, x 200. — ?n, 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). 

 60, 61. Uronema marina, Duj., vol. ii. p. 546.— 60, Adult, and 61, immature examples, 



X 600. 

 62, 63. Lembus velifer, Cohn, vol. ii. p. 547. — 62, Adult, and 63, immature example, 

 X 400 (Cohn). 

 64. B^onidium remigens, Perty, vol. ii. p. 546, x 350 (Fresenius). 



65, 65a. Proboscella vermina, Miill. sp., vol. ii. p. 549-— 65, Example as observed 



and delineated by the author, x 500 ; 65a, illustration of apparently the 

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

 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 100 ; /r, trichocysts (Wrzesniowski). 



