024 



PROTOZOOLOGY 



T. folliculata (Muller) (Fig. 283, e). Lorica 127-170/i high 

 (Kent); 160-200/x high (Kahl); salt and fresh water. 



Genus Thuricolopsis Stokes. Lorica with an internal, narrow, 

 flexible valve-rest, adherent to lorica wall and projecting across 

 cavity to receive and support the descended valve; protoplasmic 

 body attached to lorica by a pedicle; on freshwater plants. 



Fig. 283. a, Vaginicola leptostoma, Xl30 (Stokes); b, V. annulata, 

 Xl70 (Stokes); c, Cothurnia canthocampti, Xl50 (Stokes); d, C. an- 

 nulata, X340 (Stokes); e, Thuricola folliculata, XllO (Kahl);f, Thuri- 

 colopsis kellicottiana, XllO (Stokes); g, Caulicola valvata, X760 

 (Stokes); h, i, Pijxicola affitiis, Xl70 (Kent); j, P. socialis, X170 

 (Kent); k, Platycola longicollis, X200 (De Fromentel); 1, Lagenophrys 

 vaginicola, X380 (Penard); m, L. patina, Xl50 (Stokes); n, L. labiata, 

 X340 (Penard). 



T. kellicottiana S. (Fig. 283, /). Lorica about 220;u long. 



Genus Caulicola Stokes. Similar to Thuricola; but lorica-lid 

 attached to aperture; fresh or brackish water. 2 species. 



C. valvata S. (Fig. 283, g). Lorica about 50/i high; stalk about 

 1/2; body protrudes about 1/3 when extended; brackish water. 



Genus Pyxicola Kent. Body attached posteriorly to a corneous 

 lorica; lorica colorless to brown, erect, on a pedicle; a discoidal 

 corneous operculum developed beneath border of peristome, 



