THE FAUNA OF BOULDER COUNTY 



239 



(38) Cytoryctes Guarnieri. C. variola Guarnieri. Connected with smallpox. 



(39) Netu'oryctes Williams. N. hydrophobia Williams. Connected with rabies. 



Order TESTACEA M. Schultze (Thalamophora R. Hertwig) 



Covered with definite membranes or tests; pseudopodia protruded through the 

 usually single opening of the shell, and may be lobose or branched, but do not 

 normally anastomose. It is questionable whether the name Testacea, previously 

 used in MoUusca, should be appHed here, but I follow Calkins. The Gromiidae, 

 in which the pseudopodia normally anastomose, are regarded as Foraminifera. 

 They are mostly marine but a few live in fresh water, and may occur in our fauna. 

 The Testacea are divided into families according to the form of the pseudopodia, 

 following the grouping of Penard, although he does not recognize families. 

 Edmondson {Protozoa of Iowa) recognizes ArceUidae and Euglyphidae. Diplo- 

 phryidae {Diplophrys, Microcometes and Amphitrema) with more than one open- 

 ing for pseudopodia have not yet been observed in our fauna. They are the 

 Amphistomina, of Biitschli. 



Family ARCELLID.S 

 Pseudopodia thick; more or less fiUform in Cryplodtfflugia, which is in some degree 

 transitional to the next family. 



Fig. 3. Fig. 4. Fig. $■ 



Fig. 3. — Difflugia constricta, Wiesbaden, 1889. (E. Penard.) 

 Fig. 4. — Qiiadrulella symmetrica, Wiesbaden. (E. Penard.) 

 Fig. 5. — Trinema enchelys, Wiesbaden. (E. Penard.) 



Figs. 3, 4 and 5 are drawings by Miss Edith Farrington from microscopic mounts 

 prepared by Dr. Penard. 



(40) Microchlamys Cockerell. A small patelliform organism, circular, convex above, 

 with a large opening beneath through which the pseudopodium protrudes. M. 

 patella Clap, and Lach. The name Pseudochlamys Claparede and Lachmann was 

 earUer used for a beetle, and after consultation with Dr. Penard, has been changed 

 to Microchlamys in a note sent to the Zoologischer Anzeiger. 



(41) Cochliopodium Hertwig and Lesser. Shell a delicate, exceedingly flexible, 

 transparent membrane, convex above. There are several pseudopodia, which are 

 more or less triangular or subUnear, pointed. C. hilimbosum (Auerbach).* 



