716 ORDER PERITRICHA. 



Vaginicola tincta, Ehr. 



Lorica urceolate or subcylindrical, brownish-yellow, about twice as 

 long as broad, rounded or truncate posteriorly, the anterior border 

 everted; body hyaline, not much exsert. Length of lorica 1-280" to 

 1-150". HAB. Fresh water, on Zygnema and other water-plants. 



The author has recently received examples of this species from Loch Lundie, 

 Dundee, through Mr. John Hood, its companions on the same weed being Platycola 

 longicollis, Thuricola valvata, Codosiga umbellata, and other sedentary Flagellata. 

 According to their age the loricse varied in colour from perfectly transparent through 

 yellow to dark chestnut. The larger size included in the foregoing diagnosis repre- 

 sented the more normal dimensions of the lorica, whose contour might be appro- 

 priately compared to that of a short test-tube. 



Vaginicola grandis, Perty. 



Lorica subcylindrical, but of slightly undulating outline, narrower and 

 truncate posteriorly, the anterior margin slightly everted, nearly three 

 times as long as broad ; animalcule projecting but little beyond the orifice 

 of the lorica ; parenchyma enclosing green chlorophyll-granules. Length 

 of lorica 1-108". HAB. Fresh water, on aquatic plants. 



Stein, and Claparede and Lachmann consider this form to be identical with 

 Vaginicola, crystallina, but its considerably larger size, diiferent contour of the 

 anterior margin of the lorica, and the fact, according to Perty's figure, that the 

 animalcule when outstretched projects but slightly beyond its protective sheath, seem 

 to warrant its retention as a distinct species. 



Vaginicola gigantea, D'Udk. sp. 



Lorica transparent, subcylindrical, two and a half times as long as 

 broad, rounded, and slightly inflated posteriorly, the anterior border even 

 or somewhat irregular ; animalcule extending beyond the anterior margin 

 of the lorica for fully half its length ; peristome widely dilated and 

 revolute ; ciliary disc much elevated and having a thickened border ; 

 vestibular cleft extending backwards to a considerable distance ; vestibular 

 seta largely developed ; contractile vesicle situated close to the entrance to 

 the vestibule ; endoplast exceedingly long, cord-like, more or less con- 

 volute, extending through the greater portion of the length of the body. 

 Length of lorica 1-125". HAB. Pond water. 



This form, which is described by D'Udekem* under the title of Cothurnia gigantea, 

 most closely resembles Vaginicola grandis, but is distinguished from that type by the 

 rounded instead of truncate posterior extremity of the lorica and by the great dis- 

 tance to which the body is protruded beyond its anterior border. 



Vaginicola globosa, D'Udk. sp. PL. XL. FIG. 3. 



Lorica scarcely one and a half times as long as broad, dilated and 

 subglobose centrally, bluntly pointed posteriorly, narrowing and slightly 



* 'Infusoires de la Belgique,' 1864. 



