591 



L'liio- Conlimnui. 

 asperrimus, 403. 

 capacity fur infcstatinn exhibited 



by, 414. 

 Ciimplanatus, 403, 410, 416. 



parasites of, 409, 412, 415, 416. 

 coniLitus, 403. 

 doiiaciformis, 403. 

 ebeuLis, 403. 

 elegans, 403. 

 ellipsis, 403. 

 gibbosus, 401, 403. 



parasites of, 409, 410, 412, 413, 

 415, 416, 

 gracilis, 403. 

 graniferus, 403. 

 heterodoii, 401, 403. 



parasites of, 409. 

 higgiiisii, 403. 

 lachryniosus, 403. 

 la?vissinius, 403. 

 ligamentinus, 403. 

 kiteolus, 403. 

 metaiiever, 403. 

 nuiltiplicatus, 403. 

 nasutus, 403. 

 (jchraceus, 403. 

 parasite of, 405. 

 parvus, 403. 



Scypliidia sii. found on, 337. 

 plicatus, 403. 

 pustulatus, 403. 

 pustulosus, 403. 

 rectus, 403. 

 rubiginusus, 403. 

 securis, 403. 

 tappanianus, 403. 

 teiiuissinuis, 403. 

 trigonus, 403. 

 tuberculatus, 403. 

 \ entricosus, 403. 

 Unionidie, A Statistical Study of 



the Parasites of the, 399-418; 



summary of results reached, 



417. 



Union idle — Continued. 



changes in nomenclature of, 402, 



403. 

 com[)arison of infestation of, by 

 different parasites, 412. 

 of local infestation of, 416. 

 examined in study of parasites, 

 geographical distribution of. 

 401. 

 geographical distribution of i).ir- 



asites of, 414. 

 relation t)f infestation of, to 

 abundance of gi\en spe- 

 cies of, 415. 

 1 1) natural classihcation, 



413- 

 to local conditions, 417. ' 

 rel<iti\e number of parasites on 



males and females of, 403. 

 sex of individuals examined in 



studv of parasites of, 402. 

 specific distribution of parasites 



of, 4oq. 

 waters in which collections were 

 made for Kelly's study of jiar- 

 asites of, 399, 400. 

 U. S. Fish Ct)nmiission, 28, 169, 

 259. 

 National Museum, 290, 418. 

 University of Illinois, 20, 27, 185, 

 225, 229,268, 348, 441. 

 of Indiana, 229. 

 of Peimsylvania, 542. 

 of Upsala, Zoological Museum 

 of, 164. 

 Urceolariuie, 337. 

 u re e o 1 a r i s, -lirachionus, 345, 353, 



379- 

 urceolata, Diftlugia, 31c). 



'rrachelomonas, 326. 

 Urnatella gracilis, Cotluirnia cur\a 



found on, 341. 

 Uroglcna, 274, 421. 

 Utricularia, 349. 

 u\ella, Synura, 327. 



