PROTOZOA 



33 



Fam. 4. HALTEium.E. 



Genera. Slrombidium, Cl. & L. (Fig. XXIII. 4) ; ITaltcria, 

 Dujnrd., with a supplementary girdle of springing hairs ; Didinium, 

 Stein, (Fig. XXIV. 19). 



Fam. 5. GYROCOKID/E. 



Genera. Oyracoris, Stein, with an equatorial ciliary girdle spirally 

 disposed (Fig. XXIII. 23, 24); Uroccutrum, Nitzsch, girdle annular. 



Flo. XXIV. Ciliata- 1. Ophaltnopsis sepiolse, Foett. ; a parasitic Holo- 

 trichous mouthless Ciliate from the liver of the Squid, a, nuclei ; b, 

 vacuoles (nou-contractile). 2. A similar specimen treated with picro- 



carmine, showing a remarkably branched and twisted nucleus; a, in 

 place of several nuclei. 3. Trichonympha ay His, Leidy ; parasitic 



in the intestine of the Termites (White Ants); x 600. a, nucleus; 6, 

 granules (food?). 4. Opalina ranarum, Purkinje ; a Holotrichrms 



mouthless Ciliate parasitic in the Frog's rectum ; adult ; x 100. a, a, the 

 numerous regularly dispersed nuclei. 5. The same; an individual in pro- 

 cess of binary fission, a, nuclei. 6. The same; the process of fission has 

 now reduced the individuals to a relatively small size. 7. Smallest fission- 

 produced fragment encysted, expelled from the Frog in this state and 

 swallowed by Tadpoles. 8. Young uninucleate individual which has 



emerged from the cyst within the Tadpole, and will now multiply its 

 nuclei and grow to full size before in turn undergoing retrogressive 

 fission. 9. Anoplophrya naidos, Duj. ; a mouthless Holotrichous 



Ciliate parasitic in the worm Nais; x 200. a, the large axial nucleus; 6, 

 contractile vacuoles. 10. Anoplophriia prolifera, C. and L.; from the 



intestine of Clitellio. Remarkable for the adhesion in a metameric series 



of incomplete fission-products, a, nucleus. 11. Amphileptui gigas, 



C. and L. ; oncof the Bolotricha; x 100. It, contractile vacuoles ; c, tricho- 

 cysts (see Fig XXIII. Ill); ''. nurlriis ; e, pharynx. 12, 13. TVoiW.,,, 



nioeus, Ehr.; one of the lliiliitricha; x 75. a, nucleus; b, contra- hi. 

 vacuole ; c, pharynx with horny fascicular lining. 12. The fasciculate 

 cuticle of the pharynx isolated. 14. 2'r.7,, /,,,,. ,,/,, Ehr. (llolo- 



tricha) ; x SO ; showing the reticulate arrangement of the medullary pro- 

 toplasm, b, contractile vacuoles; c, the cuticle-lined pharynx. IT., 10, 

 17, is. rcthyophthinus iimHi/ilms, Fouquet ; one of the Holotriilia; 

 X 120. Free individual ami successive stages of division to fonu spores. 

 a, nucleus; b, contractile vacuoli's. 1!. Didintum ItiUUtuan, .Miill. ; 



one of the Pcritriclia ; x 200. The pharynx is everted and has seized a 

 Paramo2cium as food, a, nucleus; 6, contractile vacuole; c, everted 

 pharynx. 20. Euplotet charon, Miill.; one of the Hypotricha ; lateral 



view of the animal when using its great hypotrichous processes, , as 

 ambulatory organs. 21. Euplotes Itarpa, Stein (Hypotricha); x 150. 



h, mouth; x, hypotrichous processes (limbs). 22. Nyctotkcnu cordi- 



funiiis, Stein ; a Hetei'otrichous Ciliate parasitic in the intestine of the 

 Frog, a, nucleus ; b, contractile vacuole ; c, food particle ; d, anus ; e, 

 heterotrichous band of large cilia ; /, </, mouth ; h, pharnyx ; i t small cilia. 



Fam. 6. UROEOI.ARUD^E. 



Genera. Trichodina, Ehr. ; two ciliate girdles ; body shaped as a 

 pyramid with circular sucker-like bnse, on which is a toothed corneous 

 ring (Fig. XXIII. 8, 9); Licnophora, Clap.; Cvdochata, Hat. JacKa. 



FIG. XXV. Ciliata (conjugation, Ac.). 1. surface view of Holotrichous 

 Ciliate, showing the disposition of the cilia in longitudinal rows. 2. 



