252 MICHIGAN SURVEY, 190S. 



190C. Hirudinea and Oligochaeta Collected in the Great Lakes 

 Eeglon. Bull. U. S. Bureau of Fisheries, 25, pp. 153-171. 



1906. Ruthyen, A. G. An Ecological Survey in the Porcupine Mount- 

 ains and Isle Royale, Michigan. Ann. Rep. 1905, Mich. Geol. 

 Survey, pp. 17-55. 



1902. Ward, H. B. Notes on the Leeches of Nebraska. Report Neb. 

 State Board of Agriculture for 1901. pp. 229-242. 



■^ 



OLIGOCHAETA. 



Lnmhricidae. 



Helod/riliis (Allolohophora) caliginosus (Savignv), nearer to typicits 

 than to H. (A.) G. trapezoidcs (Ant. Dug.). These earthworms were 

 taken along the beach near the light-house at Rock Harbor (I, 1) July 

 9, and in a "rock clearing" (I, 2) on July 13, and also at the outlet of 

 Siskowit Lake (V, 9) on August 15. An undetermined species was 

 taken in the shallow humus on the rock beach under Cladonia (V, 2). 



Geographic Range. Northern Europe and North America. (Mich- 

 aelseA, '00, p. 483). 



Liini'bricus terrestris ^Miill. A large specimen was taken from the 

 mouth of a Garter Snake. {Thamnophis sirtalis) found in a clearing which 

 was formerly the location of the Ransom settlement (II, 1). The snakes 

 Avere very abundant near the shore, in the grass. It is not improbable 

 that these earthworms were introduced at this locality. Other specimens, 

 doubtfully referred to this species came from the balsam-spruce forest 

 (I, 3), where there was also found an Enchytraid. (G. 140). 



Oeographio Range. Europe; Ncav England; Illinois; Mexico. (Mich- 

 aelsen, '00, p. 512, '03, p. 144). 



EEFEEBXCES. 



1900. Michaelsen, W. Oligochaeta. Das Tierreich. 10 Lieferung. 

 1903. Michaelsen, W. Die geographisclie Verbreitung der Oligochae- 

 ten. Berlin. 



AMPHIPODA. 



Gammaridae. 



Eucrangonyx gracilis (Smith). Among the dark colored vegetable 

 debris on the north shore of Sumner Lake (III, 5) this species was found, 

 July 29; also in a small stream flowing from a tamarack-spruce swamp 

 (V, 5) on August 8, in the Poiamogeton and 'NymplKica advcna zone of 

 a small pond, and also back from the pond in small footprint-like pools 

 of water in the buck-bean (Mcnyaiithcs trifollata) and sedge zone. (A. 

 126, 128, 77, 97) . 



Hyalella kniclccrhockcri. (Bate). Taken at the west end of Rock Har- 

 bor in the bulrushes about tlie mouth of a small stream (III, 3) on 

 July 26, (G. 159). Other specimens were taken in 1904 at Lake Desov 

 ('04, VII) on August 30; and on water plants in Washington river ('04, 

 II) on August 18. 



Gammartis limnanis Smith. Found in the same conditions as the 

 above species (III, 3) and in abundance. 



