690 



SYSTEMATIC HISTOEY OF THE INFUSORIA. 



in two species, and tags in the third. Beside the three red- coloured ej-es, a 

 cerebral gangUon is seen. Distinctly striated longitudinal muscles are seen 

 in all. 



According to Leydig, what Ehrenherg has regarded as two frontal eyes 

 have no claim to the name. Should this statement be confirmed, it would 

 become necessary to unite Eospliora with Notommata. 



EosPHOiiA Najas. — Conical^ transpa- 

 rent, not am^icled ; toes much shorter 

 than the foot, (xxxin. 415, an animalcule 

 fed upon indigo.) Amongst Confervse. 

 1-12". 



E. digitata. — Conical, hyaline, not au- 



ricled; toes a third the length of the 

 foot. Amongst Confervse. 1-96". 



E. elongata. — Elongated, almost fusi- 

 form, not auricled; fi'ont truncated j toea 

 short. 1-72". 



Genus OTOGLENA. — Eyes three, one being sessile and ceiTical, the others 

 pedicled and frontal ; foot furcated. This large animalcide, the sole repre- 

 sentative of this genus, has considerable resemblance to Notommata Myrmeho 

 or N. clavulata. Pour lateral longitudinal muscles, six moving the rotary 

 organ, and two muscles of the foot are present ; a toothless, and apparently 

 jawless, oesophageal canal leads to a somewhat thickened stomach, ending in 

 a very thin intestinal canal. An ovary and contractile vesicles are observed. 

 A vascular network at the neck represents a water- vascular system. An oval 

 cerebral ganglion, with two dark appendages, and a red eye, together with 

 two little horn-like or auricular frontal protuberances bearing two visual 

 points, represent the nervous system. This genus has not been figured. 



Otoglena papulosa. — Bell-shaped, 1 with Volvox Glohator and Notommata 

 turgid, scabrous with papiUse. Foimd I Myrmeho. 1-96". 



Genus CYCLOGENA (XXXIY. 425, 426).— Eyes numerous (more than 

 three), conglomerate at the neck ; foot fiu'cate. The vibratile organ is com- 

 pound, and, with the internal muscles of the foot, serves for locomotion. The 

 oesophageal head has two single- toothed (perhaps three-toothed) jaws ; oeso- 

 phagus very short; alimentary canal conical, simple, with two roundish 

 glands. An ovary and a contractile vesicle are also present. Transverse 

 circular muscles, and six pair of tremulous organs attached to the water- 

 vascular canals, exist. A purse-shaped dark (colourless) body in the neck, 

 connected by a narrow process to a large frontal ganglion, containing from 

 six to twelve red points, of which the anterior one is most marked, possibly 

 indicates a system of sensation. 



Cyclogena Lupus {Cercaria Lupus, 

 M.). — Ovato-oblong, or conical, not 

 auricled ; foot terminal, and short. 

 (xxxiv. 425* a back \'iew, 426 a 



side view.) 1-120". 



C. (?) elegans. — Ovate, not auricled; 

 foot inferior ; toes long. 1-190". 



Genus THEORrS (XXXIY. 427-429). —Eyes numerous (more than 

 three), disposed in two groups at the neck ; foot furcate. A compound rotary 

 organ, together with two muscles of the foot, an oesophageal head, with two 

 one-toothed jaws, a short oesophagus, a simple conical ahmentary canal, with 

 two glands, a ball-like ovarium, and a double group of colouiless cervical 

 eyes, are the details of the organization at present known. The fi'ontal 

 imcinus, or hook, is perhaps a respiratory tube. Perty doubts if Ehrenherg 

 is correct in his interpretation of the supposed agglomeration of the eyes in 

 Theorus, 



THEonrs vernalis. — Toes small ; no I creature is active and v(;hement, like that 

 frontal uncinus. The movement of this | of an animal of prey, (xxxiv. 427, a back 



