356 



THE CILIATES 



D. laeve Dogiel, 1927 measures 77 

 to 100 by 52 to 70 /i and has a roughly tri- 

 angular body with no caudal projections 

 except a small lobe on the right. It occurs 

 in goats. 



D. crislagalli Dogiel, 1927 measures 

 77 to 100 by 52 to 70 jx and has a triangu- 

 lar body with the lower side extended pos- 

 teriorly to form a prominent fan with 2 

 to 7 spines. It occurs in goats. 



D. flabellum Kofoid and MacLennan, 

 1932 measures 82 to 118 by 57 to 82 ^t and 

 has a roughly triangular body with the 

 upper side extended posteriorly to form a 

 prominent fan with 5 to 7 spines, and with 

 2 small spines on the posterior left side. 

 It occurs in the zebu. 



Genus EREfAOPLASTRON 

 Kofoid and MacLennan, 1932 



The metoral and adoral zones of mem- 

 branelles are at the same level. There is 

 a single, narrow skeletal plate beneath the 

 upper surface. The macronucleus is tri- 

 angular or rod-like, often with its anter- 

 ior end bent to the right. Two contractile 

 vacuoles are present. This genus occurs 

 in the rumen and reticulum of cattle, sheep, 

 antelope and reindeer. 



Eremoplastron rostratum (Fiorentini, 

 1889) Kofoid and MacLennan, 1932 (syn. , 

 Diplodinium helseri Becker and Talbott, 

 1927) measures 40 to 63 by 22 to 47 ^i and 

 has a proportionately long, compressed 

 body with a thick flange on the left and a 

 large caudal spine on the right. The ma- 

 cronucleus is rod-like. This species 

 occurs in the ox and zebu. 



E. neglectuni (Dogiel, 1925) is 81 to 

 124/1 long and has an elongate oval body 

 with the left side strongly convex, the 

 right side slightly convex, a large lobe on 

 the right, and a long, rod-like macronu- 

 cleus. It occurs in cattle and African 

 antelope. 



E. bov is {Dogiel, 1921) {syn. , Diplo- 

 dinium clevelandi Becker and Talbott, 

 1927) measures 52 to 100 by 36 to ^1 \x 

 and has an ellipsoidal, compressed body 



with a somewhat flattened right side, a 

 more strongly convex left side, and a 

 small caudal lobe. The macronucleus is 

 rod-shaped. This species occurs in the 

 ox, zebu and sheep. 



E. monolobum (Dogiel, 1927) is 58 to 

 83(1 long and has a nearly spherical body 

 with a prominent right lobe and a low, 

 blunt left lobe. The macronucleus is thick 

 and rod-shaped. This species occurs in 

 cattle. 



E. dilobum (Dogiel, 1927) is 73 to 

 101 /i long and has an ellipsoidal, flattened 

 body with 1 left and 1 right caudal lobe. 

 The macronucleus is rod-shaped. This 

 species occurs in cattle and sheep. 



E. rugosum (Dogiel, 1927) is 69 to 

 90 /i long and has a short body with a flat 

 or slightly concave right side, a convex 

 left side, and a deep cuticular fold from 

 the cytopyge along the left side of the 

 macronucleus to the region of the metoral 

 zone of membranelles. The right lobe is 

 laterally compressed, with 8 to 10 shallow 

 indentations in its left border. The ma- 

 cronucleus is long and rod-like. This 

 species occurs in cattle. 



E. brevispinum Kofoid and MacLennan, 

 1932 measures 72 to 92 by 42 to 53 p. and 

 has an ellipsoidal, flattened body with 2 

 short caudal spines. The macronucleus 

 is rod-shaped. This species occurs in 

 the zebu. 



E. magnodentatum Kofoid and Mac- 

 Lennan, 1932 measures 58 to 82 by 30 to 

 50jLi and has a rectangular, flattened body 

 with a large, compressed caudal spine on 

 the right and a similar caudal spine on the 

 left. The macronucleus is rod-shaped. 

 This species occurs in the zebu. 



Genus EUDIPLODINIUM Dogiel, 1927 

 emend. Kofoid and MacLennan, 1932 



The metoral and adoral zones of mem- 

 branelles are at the anterior end. There 

 is a single, narrow skeletal plate beneath 

 the upper surface. The macronucleus is 

 rod-like, with its anterior end enlarged 

 to form a hook which opens to the left. 



