Drawing

Description:

Urceolus sabulosus Stokes, 1886. Cells about 40 microns long, flask-shaped, soft, flexible and elastic, normally compressed and somewhat gibbous, about twice as long as broad, widest centrally, obtusely pointed posteriorly, the entire surface more or less covered, often almost concealed, by adherent, irregular and angular sand grains, anterior end constricted to form a short neck-like prolongation, the circular border thickened, expanded, and obliquely truncate, flagellum large, equaling or exceeding the body in length, nucleus not observed, contractile vacuole (?) single, laterally placed near the anterior end, pharaynx apparently extending to near the body centre. Length of Body 51 microns Numerous grains of sand stick to cell surface. Flagellum about cell length or somewhat longer.