GENUS L OXOPH YLL UM. 529 



through the body-substance, remain, as in Loxodcs rostrum^ connected with one 

 another through the medium of a hyahne cord-hke filament or funiculus. The 

 employment of reagents such as iodine and carmine tincture is requisite for the 

 satisfactory demonstration of this phenomenon. The peculiar canal-like modification 

 of the contractile vesicle, while occurring frequently among the higher Heterotricha, 

 has not, with the exception of Haptophrya., been yet reported of any other Holo- 

 trichous form. It evidently represents a more specialized development, through 

 coalescence, of the dorsal row of spherical vesicles common to many species of the 

 preceding genus, and shared likewise by Loxophyllum sdigcrum. 



Loxophyllum armatum, C. & L. Pl. XXVII. Fig. 53. 



Body leaf-like, semicircular, having no attenuate anterior portion, the 

 posterior termination revolute ; oral aperture situated at a distance of one- 

 third of the entire length from the anterior extremity, the dorsal border 

 entire, not undulate ; the ventral margin arcuate, containing abundant 

 trichocysts ; cuticular surface finely ciliate, the cilia disposed in even longi- 

 tudinal rows ; contractile vesicle spherical, posteriorly located, sometimes 

 exhibiting a stellate outline, or dividing at the time of systole into two 

 segments. Increasing by transverse fission. Length 1-150". 



Hab. — Bog water : Berlin (C. & L.). 



With the aid of the large trichocysts which arm the ventral border, this species 

 has been observed by Claparede and Lachmann to paralyze and capture other 

 smaller animalcules. 



Loxophyllum lamella, Ehr. sp. 



Body elongate, linear-lanceolate, attenuate anteriorly, rounded poste- 

 riorly ; the dorsal margin not crenulate ; contractile vesicle single, postero- 

 terminal ; endoplast double ; no trichocysts. Length 1-200". 



Hab. — Fresh water. 



This species is identified by Claparede and Lachmann with the Trachelius 

 lamella of Ehrenberg, but not with the many forms similarly named by Dujardin, and 

 which, together with the Trachelius stricta of the same writer, they consider, while 

 possibly belonging to the genus Loxophyllum, as too insufficiently characterized for 

 identification. 



Loxophyllum rostratum, Cohn. 



Body leaf-like, highly elastic and retractile ; the ventral surface flattened, 

 the centre of the dorsal one convex, surrounded by a thin, transparent, lami- 

 nate border ; rounded posteriorly, developed anteriorly into a flexible, pointed, 

 dorsally reflected, uncinate prolongation or rostrum ; cuticular surface deli- 

 cately furrowed longitudinally, clothed throughout with fine cilia, those in 

 the region of the uncinate anterior prolongation slightly longer than the 

 others ; the centre of the dorsal border conspicuously undulate, a row of 

 trichocysts extending from this undulated border half-way to the apical 

 extremity of the rostrum ; one, two, or three contractile vesicles posteriorly 

 situated ; endoplast double, centrally located ; a row of refringent bodies 

 frequently present near the base of the dorsal border. Length 1-144". 



