Ichthydina] THE INFUSORIA. 333 



tusely triangular; the posterior hair on the dorsal surface is 

 longest. Ehrenberg has seen only one large ovum; he 

 states that the bodies of those bearing ova were thick pos- 

 teriorly, though, under other circumstances, the head is 

 broadest. It appears to have eight teeth. Pancreatic 

 glands are unknown; the dorsal hairs, which are arranged 

 in longitudinal rows, destroy the transparency of the body. 

 Fig. 357 is a dorsal, and^g. 358 a side view. Ova l-3rd the 

 length of the body. Found in muddy water. Size l-720th. 



567. CHAETONOTUS brevis. The short Chaetonotus. 

 Body ovato-oblong, slightly constricted near the turgid 

 front, dorsal hairs few, the posterior ones longest, ova 

 small. Size 1 -430th. 



Genus CXXXVII. GLENOPHORA. The eye Animal- 

 cule is characterized (as its name imports) by the presence 

 of two eyes, placed anteriorly; it has a frontal circular ro- 

 tatory organ, and a truncated bifid tail, or false foot. The 

 alimentary canal is short, thick, and conical ; it sometimes 

 contains green matter. The two protruding forcep-like 

 bodies, in the middle of the rotatory organ, may, says Dr. 

 Ehrenberg, be considered teeth; pancreatic glands are in- 

 dicated by knot-like turbid bodies. The eyes are sharply 

 circumscribed, and situated at the frontal region; a respi- 

 ratory tube is unknown. 



568. GLENOPHORA trochus. The top Glenophora. 

 Body ovato-conical, truncated, and turgid anteriorly, at- 

 tenuated posteriorly into a false foot; the eyes are blackish. 

 It swims quickly, like a Trichodina or free Vorticella. The 

 genera Monolabis and Microcodon have similar forms. 

 Figures 359, 360, represent two animalcules, the latter hav- 

 ing the stomach filled with a green substance. Size 1 -570th. 



