10 TREMATODES OF THE PACIFIC NORTHWEST 



Family MONOCOTYLIDAE 



Merizocotyle pugetensis Kay, 1942 



Host : Raja hinoculata Wash. Kay, 1942 ; Bonham, 1950 



There are no other records. 



Family POLYSTOMATIDAE 



Polystomoides coronatus (Leidy, 1888) Price, 1939 



SynonjTOS : Polystoma coronatum Leidy, 1888 

 Poly stoma opacum Stunkard, 1916 

 P. (Polystomoides) coronatum Ward, 1917 

 Polystoma mcgalocotyle Stunkard, 1916 

 Polystoma microcotyle Stunkard, 1916 



Polystomoides megalocotylc (Stunkard, 1916) Stunkard, 1924 

 Polystovia alhicoUis MacCallum, 1918 

 Polystoma digitafum MacCallum, 1918 



This synon_\iny is after Sproston (1946). 



Host: Clemmys )naniiorata Ore. Thatcher, 1954 



This form has been reported from places in North America outside of the 

 Pacific Northwest by Steward (1914), Stunkard (1916, 1917, 1924), Price 

 (1939b), and Harwood (1932). It has al.so been reported from Japan bv Fukui 

 and Ogata (1939). 



Neopolystoma orbiculare (Stunkard, 1916) Price, 1939 



SsmonjTTis : Polystoma orbiculare Stunkard, 1916 



Polystomoides orbiculare (Stunkard, 1916) Ozaki, 1935 

 Polystoma oblongum Leidy, 1888, nee. Wright, 1879 

 Polystoma troosti MacCallum, 1918 

 Polystoma inerme MacCallum, 1918 

 Polystoma elegans MacCallum, 1918 

 Polystoma spinulosa MacCallum, 1918 

 Polystoma aspidonectis MacCallum, 1918 

 Polystoma floridaniim Stunkard, 1924 



Synonymy after Sproston (1946). 



Host : Clemmys ■mar)iiorata Ore. Thatcher, 1954 



Additional hosts have been reported by all of the above authors from turtles 

 from North America, many from aquaria. 



