AND THEIE CLASSIFICATIOlf. Ill 



Order 3. Amcebcea. Nude Ehizopods which in the amoeboid 

 condition possess a very irregular mass of body-proto- 

 plasm; pseudopodia lobose, varying in form from mere 

 undulations of the surface to elongate blunt processes 

 (rarely attenuated and acute), sometimes branched, but 

 never reticulate. 



e. g. Amoeba, Ehrenb., Fehmyxa, Grreeff, Dactylo- 

 sphcerium, Hertwig & Lesser. 



Order 4. Testacea. Ehizopods in which the body-proto- 

 plasm is enclosed in a shell of variable construction ; 

 pseudopodia blunt and lobose or thread-like and atten- 

 uated to fine points, often branched and rarely reticulate. 

 e. g. Difflugia, Leclerc, Arcella, Ehrenb., JEugly- 

 pha, Dujardin, Pamphagus, Bailey, Diplophrys, 

 Barker, &c., &c. 



The following is a systematic account of some of the most 

 interesting Ehizopods 1 have recently examined. 



Class EHIZOPODA. 



Order Vampyrellida. 



Grenus Ntjcleaeia, CienJcowshi. 



1. Ntjclearia conspicua, ep. n. (PL 13. figs. 16-19.) 



Protoplasmic body subglobose or angularly rounded; proto- 

 plasm undifferentiated, granulose, containing numerous large 

 vacuoles, with a single large spherical nucleus which exhibits a 

 punctate appearance ; pseudopodia fairly numerous, stout, rigid, 

 generally with one or two branches which are a little divergent 

 and attenuated to fine points. 



Diameter of body 83-120 ^; length of pseudopodia 17-54 fx. 



JB.ab. In boggy pools, Lewis, Outer Hebrides. 



This Ehizopod occurred in considerable profusion amongst 

 numerous Desmids and other Algse in small pools. The animals 

 are of much larger size than N. delicatula, Cienk., or N. simplex, 

 Cienk., and the protoplasm is much more vacuolated. There is 

 a single nucleus present in each individual, but no contractile 

 vacuoles were observed. The pseudopodia are protruded irregu- 

 larly from the surface of the body-protoplasm, often in small 

 clusters. They are broad at the base, generally straight and 



LINN. JOUEN. — ZOOLOGY, VOL. XXfX. 8 



