28 



d. Mission Bottom. 



1. U.S.A., Oregcxi, Marion County. 



2. latitude, IcHigitude, altitude: 450205N, 1230340W; 

 125'. 



3. Legcil description: T6S, R3W, Section 65. 



4. USGS quad: Missicm Bottom, 7.5'. 



5. Year of initial discovery: 1977. 



6. Year of most recent observation: 1977. 



7. Location: MissicHi Bottom, near Salem (W. Bluhm, 

 sight record) . 



8. Alternative site name: none kncxm. 



e. HcMard lake. 



1. U.S.A., Csdifomia, Mendociixa County. 



2. Latitude, Icxigitude, altitude: unknown. 



3. Legal descripticxj: unknown. 



4. USGS quad: Buck Rock, 7.5'. 



5. Year of initial discovery: 1928. 



6. Year of most recent observati<xi: 1928. 



7. Location: Pond neau: Howard Lake, Mendocino County 

 Forest Reserve ( A. Eastwood 13267a . CAS) . 



8. Alternative site name: none known. 



The populations in Oregcxi have been seeoxhed for to no avail 

 (J. Kagan, pers. oonin.) ; the Marion and Clackamas county 

 sites are in areas which have largely been developed, and 

 intensive relocation efforts at the Multnomah County site 

 (type locedity) have remained unsuccessful. LiJcewise, the 

 California collection locality has not been relocated, 

 despite searches for it in 1979 (Griggs and Dibble 1979) , 

 and again in 1980 (R. Bittman, pers. corm.). 



3. Historically known populations where current status not 

 known: 



a. Sheltcxi. 



1. U.S.A., Washington, Mason County. 



2. Latitude, longitude, altitude: unJoicwn. 



3. Legal description: unknown. 



4. USGS quad: un]ax::wn. 



5. Yecur of initial discovery: 1937. 



6. Year of most recent observation: 1937. 



7. LocatiOTi: In a small lake about 20 mi. n. of 

 Shelton f W.J. Everdam 1211 . UC) . 



8. Alternative site name: none known. 



4. Locations not yet investigated believed likely to s^xart 

 additional natural populations: In western Montana, an 

 extensive assemblage of glacial pothole ponds and wetlands 

 is located in the Flathead Valley in Lake County. However, 

 this regic«i of the state has been extensively altered by 



