in d. Naturgesch. d. nied. Thiere währ. d. Jahre 1876—1879. 761 



phrys punicea Arch.), Clathrulina elegans Cienk. (= Po- 

 dosphaera Haeckeliana Arch.). Die Ordnung der Forami- 

 feren endlich weist nur Gromia terricola Leidy auf und Bio- 

 myxa vagans Leidy, eine Form, die nach der Ansicht des 

 Ref. weit eher, als die Vanipyrella lateritia Leidy dem 

 Cienkowsky'schen Gen. Vampyrella zAigehören dürfte 

 und keinesfalls, wie schon der Mangel einer Schale be- 

 weist, eine Foraminifere ist. 



Die vom Verf. theils schon früher, theils auch jetzt erst auf- 

 gestellten neuen Genera werden charakterisirt wie folgt: 



üramoeba Leidy. Animal possessing the same essential Charak- 

 ters as the genus Amoeba, bat in addition provided with fixed fila- 

 mentous appendages habitually trailing form the posterior extre- 

 mity of the body. Filaments flexible, cylindrical, tubulär, inarticu- 

 late or articulate, resembling the mycelial threads of fungi, perfectly 

 passive and neither retractile nor exsertile. 



Dinamoeba Leidy. Animal with the same essential structure 

 of Amoeba; when at rest spheroidal or oval, when in motion habi- 

 tually ovoid or slug-like and with the broader extremity in advance. 

 Pseudopods few or many, mostly simple extensions of the ectosac, 

 subulate or long conical and acute, occassionally furcate. Posterior 

 extremity of the body papillose; papillae very variable, few or many, 

 simple or Compound, retractile. Surface of the body, including the 

 pseudopods and papillae, bristling with minute spicules or motion- 

 less cils. Body of the animal often enveloped, even in the active 

 moving condition, with a thick layer of delicate hyaliue jelly, defi- 

 ned on the surface by multitudes of minute spicules. Spicules of the 

 surface of the body and the exterior layer of jelly with its spicules 

 some-times absent. 



Nebelia n. gen. Shell usually compressed, pyriforme, trans- 

 parent colourless, with or without appendages, composed of cancel- 

 lated membrane or of peculiar intrinsic structural Clements of va- 

 riable form and size, mostly of circular or oval disks, of narrow 

 rectangular plates or rods or of thin less regulär angular plates, 

 often almost exclusively of one or the other, sometimes of two or 

 more intermingled in variable proportions, sometimes of chitinoid 

 membrane incorporated with more or less extrinsic Clements, and 

 sometimes of these entirely; as in Difflugia. Mouth inferior, termi- 

 nal, oval. Sarcode colourless, in form, Constitution and arrangement 

 as in Difflugia, Hyalosphenia etc. 



Heleopera n. gen. Shell compressed, ovoid, composed of 

 cancellated chitinoid membrane, presenting a reticulated appearence 



