SPIROTRICHA, HYPOTRICHA 613 



Genus Certesia Fabre-Domergue. Ellipsoid; flattened; dorsal 

 surface slightly convex, ventral surface flat or concave; 5 frontals 

 at anterior border; 7 ventrals; 5 anals; no caudals; marginals 

 small in number; 4 macronuclei; salt water. One species. 



C. qimdrinucleata F.-D. (Fig. 277, e). 70-100m by about 45^. 

 Genus Diophrys Dujardin. Peristome relatively large, often 



reaching anals; 7-8 f rontal- ventrals ; 5 anals; 3 strong cirri 

 right-dorsal near posterior margin; salt water. 



D. appendicidatus (Ehrenberg) (Fig. 277, f). 60-100ai long; salt 

 water; Woods Hole (Calkins). 



Genus Uronychia Stein. Without frontals and ventrals; 5 

 anals; 3 right-dorsal cirri (as in Diophrys); 2 left-ventral cirri 

 near posterior margin; peristome, oval with a large undulating 

 membrane on right edge; salt water. Several species. 



U. setigera Calkins (Fig. 277, g). 40/i by 25)u; salt water; Woods 

 Hole. 



Family 3 Aspidiscidae Claus 



Genus Aspidisca Ehrenberg. Small; ovoid; inflexible; right and 

 dorsal side convex, ventral side flattened; adoral zone reduced or 

 rudimentary; 7 f rontal- ventrals ; 5-12 anals; macronucleus horse- 

 shoe-shaped or occasionally in 2 rounded parts; contractile 

 vacuole posterior; fresh or salt water. Numerous species. 



A. lynceus E. (Figs. 52; 277, h). 30-50/i long; fresh water. 

 Division studied by Summers (1935). 



A. polystyla Stein (Fig. 277, i). About 50^ long; salt water; 

 Woods Hole (Calkins). 



References 



Calkins, G. N. 1902 Marine Protozoa from Woods Hole. Bull. 



U. S. Fish. Comm., Vol. 21. 

 Kent, S. 1881-1882 A manual of Infusoria. London. 

 NoLAND, L. E. 1937 Observations on marine ciliates of the Gulf 



coast of Florida. Trans. Amer. Micr. Soc, Vol. 56. 

 Roux, J. 1901 Faune infusorienne des eaux stagnantes des 



environs de Geneve. Mem. fac. sci. TUniv. Geneve. 

 Stein, F. 1867 Der Organismus der Infusionstiere. Vol. 2. 

 Stokes, A. C. 1888 A preliminary contribution toward a history 



of the freshwater Infusoria of the United States. Jour. 



Trenton N. H. Soc, Vol. 1. 



