PLATE V. 



PELOMYXA VILLOSA, under the name of Amoeba villosa. 



The upper extremity of the figures corresponds with the forepart of the animal in movement. 

 Magnified 250 diameters, except those specially indicated. Figs. 1, 11, 13, 14 viewed by reflected light ; 

 the others liy transmitted light. 



Fig. 1. Individual from China Lake, Mount Gilbert, Uinta Mountains, Wyoming, August, 1877. 

 The broader part in advance, with projection of a cap of clear ectosarc, into which the granules of the 

 endosarc are seen entering on the left. The posterior extremity with a circular patch of villous pro- 

 cesses. 



Fxg. 2. Individual from a pond, Atco, N. J., September, 1877. The narrow part in advance, with 

 a thick cap of clear ectosarc. The posterior extremity with a double villous patch, within one part of 

 which three small contractile vesicles are visible. 



Fig. 3. A smaller individual from the same locality. It presents four small conical pseudopods. 



Fig. 4. Another individual from the same locality. It, terminates in a villous ball. 



Fig. 5. A more translucent individual, likewise from the same locality. 



Fig. (i. Individual from China Lake, Uintas, exhibiting in the interior, mingled with the food, a 

 multitude of sand grains. 



Fig. 7. A small individual from Fort Bridger, Wyoming. The body ending in a villous ball. 



Figs. 8, 9. Two small individuals from the same locality. The former figure exhibits a granular 

 nucleus near the centre, and both present posteriorly a large contractile vesicle. 



Fig. 10. Individual from a ditch below Philadelphia, September, 1875. 



Fig. 11. An individual of large size, at rest, trom Absecom pond, New Jersey, June, 1874. Mag- 

 nified 33 diameters. The specimen w r as remarkable for the abundance of quartz sand it contained. 



Fig. 12. Individual from Hammonton pond, New Jersey, September, 1877. The posterior villous 

 processes exhibit within a number of small contractile vesicles. Among the food-contents posteriorly a 

 large diatom is observable. 



FIG. 13. The same specimen as subsequently observed by reflected light. 



Fig. 14. An individual from a pond on Dr. George Smith's farm, Upper Darby, Delaware County, 

 June, 1S74. 85 diameters. As seen by reflected light in movement. The posterior villous ball with a 

 quantity of material adherent and dragged after the animal. Many similar specimens were obtained, 

 varying from 0.25 to 0.75 mm. in length. They were remarkable for the abundance of sand they con- 

 tained. 



Figs. 15-17. Three small individuals from the same locality. Magnified 350 diameters. 



Figs. 18, 19. Portion of the contents pressed from the specimen of fig. 11, consisting of granules, 

 clear globules, granular corpuscles with nuclei, linear bodies, and quartz sand. Magnified 500 diameters. 



