[RUDINEA AND OLIGOCH^TA OF THE GREAT LAKES KECJION. 159 



LIXEATA TYPE. 



(180a) East Harbor, Sandusky, Ohio, near Lakeside, August 4, 1899; from fiags. 

 (209o) East Harbor, Sandusky, Ohio, August 9, 1899. 



Huron, Ohio, August 10, 1899. 



(2ti9n) Erie, Pa., north shore of Erie Bay, August 14, 1899. 

 (307a) Erie, Pa., boat landing, August 16, 1899; iwm Sagittaria. 

 (314n) Boat Harbor, Erie, Pa., Augu.?t 16, 1899; from Cemtophyllum. 

 (327a) Long Point, Canada, August 18, 1899. 

 (365n) Long Point, Canada, August 21, 1899. 



(4o6!(, 459i(, 460n) Rondeau Harljor, Ontario, East Swamp, August 28, 1899. One specimen onl\ 

 4 mm. long has the longitudinally striated pattern very strongly developed. 



ILL.^TED TYPE. 



(200a) East Harbor, Sandusky, Ohio, August 8, 1899. 



(32.5a, 343a) Long Point, Canada, August 18, 1899. 



(457a, 460a) Rondeau Harbor, Ontario, East Swamp, August 28, 1899. 



Glossiphonia complanata (Linmeus) Johnston. 



A common species. (PI. xxxu, fig. 4.) 



(40a, 109o) Middle Bass Island, Ohio, North Swamp, July 24, 1899. 



(92a) North Bass Swamp, Put-in Bay, Ohio, July 21, 1899. 



(125a) East Harbor, Sandusky, Ohio, July 28, 1899. 



(178a) East Harbor, Sandusky, Ohio, near Lakeside, August 4, 1899; from flag leaves. 



(326a) Long Point, Canada, August 18, 1899. 



(365a) Long Point, Canada, August 21, 1899. 



(380a) Long Point, Canada, August 23, 1899; from rock bass. 



(439a) Rondeau Harbor, Ontario, August 28, 1899; East Swamj). 



Glossiphonia heteroclita ( Linna-us). 



This species is either rare in Lake Erie or, on account of its small size and pale color, was over- 

 looked. It was collected in small numbers at but three localities. 

 (268a) Erie, Pa., August, 1899; from logs on north shore. 

 (327a) Long Point, Canada, August 18, 1899. 

 (459a) Rondeau Harbor, Ontario, August 28, 1899; from I^ast Swamp. 



Placobdella picta (Verrill). 



Taken only in the -western end of the lake. The length and distinctness of the median light 

 stripe vary greatly. (PI. .\xxii, fig. 3.) 



(33a) South Bass Island, East Swamp, July 10, 1899. 

 (91a, 92a) Put-in Bay, Ohio, North Bass Swamp, July 21, 1899. 

 ( llOa) Middle Ba.ss Island, Ohio, Middle Swamp, July 24, 1899. 

 (109a) Middle Bass Island, Ohio, North Swamp, July" 24, 1899. 

 East Haven, Sandusk\-, Ohio. 



Placobdella parasitica (Say). 



Nearly all of tlie examples of this species were taken from snapping turtles; one very large one in 

 the bottom tow (39a). 



(9a) South Bass Island, Ohio, Lemna Pond, July 5, 1899. 



(39a) Put-in Bay, Ohio, July 15, 1899; bottom tow. 



(77a) Put-in Bay, Ohio, July 17, 1899. 



(97a) North Bass Island, July 20, 1899; from carapace of turtle. 



(135) Put-in Bay, Ohio, Squaw Bay, September 13, 1898. 



