sy 
19 
Clark, H. James 
1871. The American Spongilla, a craspedote, flagellate infusorian. 
Am. Jour. Sci. and Arts. (3) 2 : 426-436. 
Dawson, G. M. 
1878. On some Canadian species of Spongilla. Can. Nat. (n. s.) 
ome 
Edwards, Arthur M. 
1896. Sponges considered microscopically. Am. Month. Micr. Jour. 
16 : 379-381. aie 
Evermann, B. W., and Clark, H. W. 
1920. Lake Maxinkuckee—a physical and biological survey. 2 vol. 
Pub. by Dept. Conserv. Indiana. (Sponges, 2: 103— 
104.) 
Forbes, S. A. 
1893. A preliminary report on the aquatic invertebrate fauna of 
the Yellowstone National Park, Wyoming, and of the 
Flathead Lake region of Montana. Bul. U.S. Fish Comm. 
11 : 207-258. 
Hankinson, T. L. 
1916. Observations on the Fishes of Houghton county, Michigan. 
Pub. 20, Biol. Ser. 4, Mich. Geol. and Biol. Surv. 
(Sponges, p. 17.) 
1916a. Results of the Shiras expeditions to Whitefish Point, Michi- 
gan: fishes. Idem. (Sponges, p. 118.) 
Kellicott, D. S. , 
1891. The Mills collection of fresh-water sponges. Bul. Buffalo 
Soc. Nat. Sci. 5 : 99-104. 
1897. Preliminary report on the fresh-water sponges of Ohio. 
5th Ann. Rep. Ohio State Acad. Sci., p. 50. 
Kirsch, A. M. 
1909. Fresh-water sponges and particularly those of the United 
States. Midland Naturalist, Notre Dame, Ind., 1 : 29-38. 
1909a. Carterius both a synonyme and homonyme. Idem, 1 : 60. 
Kofoid, C. A. 
1899. The plankton of Echo River, Mammoth Cave. Trans. Am. 
Micr. Soc. 21 : 113-126. 
1908. Plankton studies. V. The plankton of the Illinois River, 
1894—1899. Part II. Constituent organisms and _ their 
seasonal distribution. Bul. Ill. State Lab. Nat. Hist. 8 : 
1-361. (Porifera on p. 132.) 
