THE CILIATES 



355 



d. disk ; 



memb \ J^,/ 



in. d- lip 



out. d. lip. rp- I II j,^ 



out. d. fur. -/^ JeJf^ 



mcmb. root. /'■^~- // I I ^ A 



^/f If 



micr. - 

 cont. vac. - 



in. ad. lip 

 out. ad. lir- 

 oat ad. fur- 



bound, lay. 



in. fibril 

 -•anch. fibril 



m. anch, fibril 



Fig. 39. Ciliates of ruminants. A. Dipluiliitiiini deiitatittu. X 850. anch. fibril, an- 

 choring fibril; aiiKS. cytopyge; buKiid. lay., boundary layer; cont. vac. con- 

 tractile vacuole; (/. disk, metoral disk; eel. . ectoplasm; t';/(/. , endoplasm; 

 e\c. pore, excretory pore; ///. ad. lip. inner adoral lip; in. d. lip, inner 

 metoral lip; in. fibril, inner fibril; inacr. , macronucleus; ;/;. anch. fibril, 

 main anchoring fibril; inarg. fibril, marginal fibril; menib. . membranelle; 

 iiicinb. root, membranelle root; iiiicr. , micronucleus; mouth, mouth; ocs. . 

 esophagus; opcr. , operculum; or. disk, oral disk; out. ad. fur. . outer adoral 

 furrow; out. ad. lip, outer adoral lip; out. d. fur. , outer metoral furrow; 

 out. d. lip. outer metoral lip; reel., rectum. B. Mctadiniuin medium. 

 X 425. C. Ostracodinium iiiamniusiun. X 425. (From Kofoid and Mac Lennan, 

 1932) 



1930, considered separate species): 

 anacaiithum , monacantluim . diacaiithiDii . 

 tyiacaiithum, tetracaiitJiuDi, peiitacaii- 

 tkum, and anisacanthutu. with 0, 1, 2, 3, 

 4, 5 and 6 caudal spines, respectively. 

 It occurs in the ox and zebu. 



D. psittaceum Dogiel, 1927 measures 

 95 to 155 by 59 to 105 jix and has a heavy, 

 rounded, posteriorly tapering body with a 

 thin ventral spine on the right and a nar- 

 row flaiige on the left of the posterior 

 third of the body. The macronucleus is a 

 stout rod-like body with its anterior end 

 bent at a 40° angle. The contractile vac- 

 uoles lie near the left side. This species 

 occurs in the ox and zebu. 



D. biibalidis Dogiel, 1925 measures 

 104 to 195 by 58 to 98 |u and has an oval 

 body with its largest diameter anterior, a 

 strongly convex left side and a slightly 

 convex right one. There is a small, longi- 

 tudinal groove on the posterior part of the 

 upper surface of the body, and a single, 

 thin spine on the right. This species oc- 

 curs in cattle and African antelope. 



D. elongatum Dogiel, 1927 measures 

 177 to 205 by 73 to IOO^l and has an elon- 

 gate body with weakly convex left and right 

 sides and a narrow groove in the posterior 

 end of the upper surface of the body. It 

 occurs in the ox. 



