The Rotatorian Genus Diaschiza. . 5 



drawn at the uniform amplification of 476 diameters, so that the 

 relative sizes of the various species allow direct comparison. 



A Dichotohous Scheme of the Genus Diaschiza. 



A. Eye present. 

 B. Eye frontal. 

 C. Body long and large, laterally compressed .. 



CC. Body short, not laterally compressed. 



D. Body almost spherical, small, toes decurved 



DD. Body gibbose, but of medium length. 



E. Toes sharp, straight, lorica moderately 

 stiff, with a projecting tail.. 



EE. Toes blunt, slightly recurved, lorica re- 

 markably flexible, no projecting tail. 



BB. Eye cervical. 



F. Head large, body short, rapidly tapering .. 



FF. Head not conspicuously large, body longer, 

 gradually tapering. 



G. Foot ventral, lorica projecting over the 



foot. 

 GG. Foot not ventral, lorica not projecting. 

 H. Large species, buccal orifice very pro- 

 jecting, toes much decurved 

 HH. Small species. 



K. Buccal orifice fairly projecting, toes 

 nearly straight, slightly recurved, 

 body normal. 



KK. Buccal orifice not prominent, toes 

 distinctly decurved, body wedge- 

 shaped. 

 AA. Eye absent. 



L. Toes of normal length and form, considerably 

 less than half the rest of body. 



M. Lorica fairly stiff, body laterally compressed, 

 of even breadth throughout, toes upcurved, 

 gastric glands usually tinted red. 



MM. Lorica very flexible, body not laterally 

 compressed, tapering slightly fore 

 and aft, toes outcurved, gastric glands 

 sometimes tinted brown. 



LL. Toes of abnormal length or form„ 



N. Toes flexible, less than two-thirds rest of 

 body, curved. 



O. Toes about half length of rest of body, 

 tapering rapidly about their middle to 

 a flexible thread. 



00. Toes very short, less than one- fourth rest 

 of body, flexible throughout, head 

 abnormally large, clefts doubtful, no 

 setae on foot. 



NN. Toes not flexible, more than two-thirds 

 rest of bodv, recurved. 



D. gibba, ^ in. (282 /*) 

 No. 1. 



D. globata, 2 J,j in. (127 /*) 

 No. 2. 



D. sterea, ^ in. (181 /i> 



No. 3. 

 D. gracilis. ^ in. (149 /x) 



No. 4. 



D. lacinulata, T * T , in. (158/*) 

 No. 5. 



D. ventripes, T ij, in. (133 /x} 

 No. 6. 



D. Hoodii, yjU in. (195 fx) 



No. 7. 



D. Derbyi, jfc in. (141 M ) 



No. 8. 



D. exigua, 2 |^ in. (98 jx) 

 No. 9. 



D. cseca, T ^ (204 /x) 

 No. 10. 



D. tenuior -rin in. (195 /t) 



No. 11. 



T3TT 



D. 



eva. 

 No. 12. 



5 V in. (267 m) 



D. ? megalocephala 



T $ T in. (200 M ) 

 No. 14. 



D. tenuiseta, ^ in. (267 fx) 

 No. 13. 



