GENTS YAMI'YRELLA— VAMPYKELLA LATERITIA. 253 



smaller ones. In the group of thirty-eight, above indicated, shortly after 

 the observation it separated into three groups, of fifteen, thirteen, and ten. 

 Raphidiophrvs feeds, and it also discharges the remains of the food, in 

 the same manner as Actinophrvs 



VAMPYKELLA. 



Amaiba: Freseuius, 1856. Vampyrella : Cienkowski, 1805. 



Animal usually Actinophrys-like, with a soft spheroidal body, capable 

 of amoeboid variations of form, composed of pale, colorless, granular proto- 

 plasm, with abundance of coloring matter, oil-like molecules, and vacuoles. 

 Pseudopods as Actinophrys-like rays, Acineta-like rays?, and digit-like, 

 lobate, or wave-like expansions. 



VAMPYRELLA LATERITIA. 



Plate XLV, figs. 10-10. 



Amoeba lateritia Fresenius : Abb. Senek. Naturf. Gesells. ii, 1856-8, 218, Taf. x, Fig. 13-19.— Cienkowski : 



Jahrb. wis. Bot. iii, 1863, 428. 

 Vampyrella Spirogyrw. Cienkowski : Arcb. mik. Auat. i, 1835, 218, Taf. xii, xiii, Fig. 44-56. — Haeckel: 



Biolog. Studien, 1870, 72. — Hertwig andLesser: Arcb. mik. Auat. x. 1874, Suppl. 61. — Archer : 



Quart. Jour. Mic. Sc. 1877, 347. 



Body brick- or orange-red, with hyaline periphery, commonly spherical, 

 but capable of much change of shape Pseudopods as Actinophrys-like 

 rays, and lobate extensions, together with Acineta-like rays? 



According to Hertwig and Lesser, Vampyrella Spirogyrce, originally 

 described by Cienkowski, occurs mostly in an Actinophrys-like form, 

 measuring 0.02 mm. to 0.075 mm. in diameter. The granular protoplasm 

 of the body is pervaded with coloring matter of different shades of orange, 

 reddish yellow, brownish yellow, and greenish. The coloring of the cen- 

 tral portion is so intense as to obscure from view a nucleus, if one exists. 

 The periphery of the body is hyaline, and contains several non-contractile 

 vacuoles The pointed pseudopodal rays frequently start from a common 

 basis, and may fork, but do not anastomose Besides these, from time to 

 time, broad, blunt, lobate, hyaline processes of protoplasm rapidly appear 

 and disappear In both kinds of pseudopodal extensions, peculiar move- 

 ments of granules occur, in which they are quickly projected and withdrawn. 

 Hertwig and Lesser observe, that so long as the Vampyrella retains its 



