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 boio-shapcd 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 hj fig. 65. Fig. 63 

 is a representation after self-division has ensued, and 

 fig. 64 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 1 -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 ; 



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