762 Leuckart: Bericht üb. d. wissenschaftlichen Leistungen 



of mostly dotted or interrupted lines, often at the fundus incorpo- 

 rated with particles of sand. Mouth inferior, terminal, large, trans- 

 versely elliptical. Sarcode and its constituents as usual in Hyalo- 

 sphenia and Nebelia. Pseudopods numerous, digitiform. 



Campascus n. gen. Animal provided with a shell having the 

 form like that of Cyphoderia, but provided with a pair of lateral 

 divergent processes of the fundus and composed of homogeneous 

 chitinoid merabrane. The soft part together with pseudopods as in 

 Cyphoderia. 



Placocysta n. gen. Animal with a compressed oval hyaline 

 colourless shell, with acute border and terminal elliptical mouth; 

 the border of the latter entire, with acute commissures. Shell com- 

 posed of longitudinal rows of alternating oval or roundish plates 

 overlapping at their contiguous borders, so as to produce hexa- 

 hedral areas limited by zones of minute ellipses. Lateral borders 

 and fundus furnished with acuminate spines articulated with the 

 shell. Sarcode and pseudopods as in Euglypha. 



Biomyxa Leidy. Initial form sphaerical , but incessantly 

 changing, consisting of a glairy colourless finely granulär proto- 

 plasm, which has the power of expanding and extending itself in 

 any direction and of projecting pseudopodal filaments, which freely 

 branch and anastomose; a circulation of minute granules in currents 

 along the body and pseudopods ; contractile vesicles numerous and 

 minute, and occurring both in the body and pseudopods. A nucleus 

 present or absent. 



Die von Barnard (Amer. Quaterly microsc. Journ. 

 Vol. I. N. 2) veröffentlichten „new Rhizopods'' sind Ref. 

 nicht zu Gesicht gekommen. 



Nuda. Brandt überzeugt sich bei seinen micro- 

 chemischen Untersuchungen an Protozoen von der vollstän- 

 digen Abwesenheit des Nucleins bei der (kernlosen) Prot- 

 amoeba und dem Vorkommen eines schleimigen cellulose- 

 ähnlichen Kohlenhydrates in der körnigen Innenmasse 

 aller daraufhin untersuchten Formen. Sitzungsber. der 

 Gesellsch. naturf. Freunde in Berlin 1878 S. 199 oder 

 Verhandl. der physiol. Gesellsch. zu Berlin vom 13. Dec. 

 dess. Jahres. 



Engelmann constatirt die Thatsache, dass die plötz- 

 liche Einwirkung eines massigen Lichtes einen intensiven 

 Einfiuss auf Pelomyxa palustris ausübt, indem dieselbe 

 dadurch zu einer plötzlichen Zusammenziehuug und zur 



