Closterina.] THE INFUSORIA. 147 



body, and the green granules arranged in fillets, about ten 

 in number. Average length l-50th. 



105. CLOSTERIUM moniliferum (Vibrio lunula, M.) 

 The pearl or necklace-bearing Closterium. Lorica smooth, 

 crescent-shaped, never straight, attenuated and rounded 

 at the apices. Pellucid glandular substances in the middle 

 of the body arranged in a single series, like a string of 

 pearls (Moniliferum), and several fillets of green granules, 

 three in the centre more distinct than the rest. Length 

 1- 120th. 



106. CLOSTERIUM Dianae. The bow-shaped Closterium. 

 Lorica smooth, more gracefully crescented, greatly 

 attenuated, and sharper at the extremities than the pre- 

 ceding species ; glands disposed in a single series along the 

 middle of the body, with several green longitudinal rays, 

 straight or curved, but somewhat obscure. Found in 

 turf-water. Length 1-1 20th. 



107. CLOSTERIUM acerosum (Vibrio lunula, M.) The 

 needle-shaped Closterium. Lorica smooth, straight, and 

 spindle-shaped, gradually attenuated towards the obtuse 

 extremities, green ; glands arranged in a single series along 

 the medium line, and rays numerous, but obscure. This 

 species has been mistaken for C. lunula. The normal 

 form of this animalcule is represented by^. 65. Fig. 63 

 is a representation after self-division has ensued, and 

 fig. 61 is one cut asunder, so as to shew it in the act of 

 separating from its shell or lorica. Found in brook-water. 

 Length from l-400th to l-50th. 



108. CLOSTERIUM trabecula. The beam-shaped Clos- 

 terium. Lorica smooth, straight, cylindrical, constricted 

 at the middle, and truncated at both extremities ; green ; 



L 2 



