CILIATE PROTOZOA (INFUSORIA) 



Rcprcscntati 



275 



40 (41) Body not elongated; spherical to ovate, slightly flexible; a short 

 proboscis at the base of which is the mouth. Pharynx 



with rods Trachdiiis Schrank. 



"'"'"'" species Trachelius ovum YMxiinhiixg 1^7,^. 



Neck highly flexible. Mouth circular; pharynx with rods. 

 Nucleus central; contractile vacuoles numerous. Endoplasm 

 at the inner end of the pharynx usually spreads out into four 

 or five broadly diverging ramifications. Length 500^. J."— "<- 

 water. 



Fig. 474. Trachclius ovum, x 85. (After Blochmann.) 



T'resh 



41 (40) Body greatly elongated, band-Hke, very flexible; proboscis long with 

 mouth at the base and a row of long cilia along its ventral 



side Dilcptus Dujardin. 



Representative species. Dilcptus gigas Claparede and Lachmann 1858. 



c>v Body somewhat compressed, often with a pointed, 



j) tail-like prolongation. A prominent shoulder or 

 hump often indicates the position of the mouth. 

 Nucleus moniliform, very long. Contractile vacuoles 

 numerous in a dorsal row. Trichocysts on the ven- 

 tral surface of the neck. Length 500 to 800 n. Pond 

 water. 



Fig. 475. Dileptus gigas. x no. f.\fter Conn.) 



Mouth terminal; body elongated with a long proboscis. Nucleus 



double Lionotopsis Conn. 



Representative species Lionotopsis anser Conn 1903. 



Fig. 476. Lionotopsis anser. X 230. (.^ftcr Conn.) 



43 (36) Mouth usually closed; pharynx when present, without rods. . . 44 



44 (45) With a broad hyaline border; body flattened; proboscis short, mouth 



on the left side. Trichocysts well developed on the right 



side Loxophyllum Dujardin. 



Representative species Loxophyllum rostratum Cohn 1866. 



Anterior extremity prolonged into a dorsally re- 

 flected, uncinate rostrum. Cilia of anterior region 

 longer. Middle of the dorsal border crenulate, the row 

 of trichocysts extending from this region forward 

 nearly to the tip of the rostrum. Nuclei multiple, 

 central; a number of contractile vesicles {X)sterior. 

 Length 190 m- Recorded by Conn from the fresh 

 waters of Connecticut. 



Fig. 477. Loxophyllum rostratum. 

 (After Conn.) 



45 (44) 



46 (47) 



Without a broad hyaline border 46 



Body flattened, elongated with an acute proboscis at the base of 

 which is the mouth. Nucleus single or double. 



.1 mp/iilcptus Ehrenberg. 

 Representative species {mpliilcpliis guttn Cohn iS,66. 



Mouth about one-third the length of the body from the 

 anterior end. Pharynx a short smooth tube. Cilia ev(^n all 

 ^=?^,iii^ over the body. Nucleus-like corjiusclos scattcre<l throughout 

 the cortical region. Contractile vacuole single, posterior. 

 Length 125 n. Reported by Conn from Connecticut. Cohn 

 reports the species from salt water. 



Fig. 478. Amp/tileplus gutta. X 335. (After Conn.) 



