INDEX. 



591 



Unio— Continued. 

 asperrimus, 403. 

 capacity for infestation exhibited 



by, 414. 

 complanatus, 403, 410, 416. 



parasites of, 409, 412, 415, 416. 

 corn nt us, 403. 

 donaciformis, 403. 

 ebenus, 403. 

 elegans, 403. 

 ellipsis, 403. 

 gibbosus, 401, 403. 



parasites of, 409, 410, 412, 413, 

 415, 416, 

 gracilis, 403. 

 graniferus, 403. 

 ( heterodon, 401, 403. 



parasites of, 409. 

 higginsii, 403. 

 lachrymosus, 403. 

 la?vissimus, 403. 

 ligamentinus, 403. 

 luteolus, 403. 

 metanever, 403. 

 multiplicatus, 403. 

 nasutus, 403. 

 ochraceus, 403. 

 parasite of, 405. 

 parvus, 403. 



Scyphidia sp. found on, 337. 

 plicatus, 403. 

 pustulatus, 403. 

 pustulosus, 403. 

 rectus, 403. 

 rubiginosus, 403. 

 securis, 403. 

 tappanianus, 403. 

 tenuissimus, 403. 

 trigonus, 403. 

 tuberculatus, 403. 

 ventricosus, 403. 

 Unionidas, A Statistical Study of 



the Parasites of the, 399-418 ; 



summary of results reached, 



417- 



Unionidae — Continued. 



changes in nomenclature of, 402, 



403. 

 comparison of infestation of, by 

 different parasites, 412. 

 of local infestation of, 416. 

 examined in study of parasites, 

 geographical distribution of, 

 40 r. 

 geographical distribution of par- 

 asites of, 414. 

 relation of infestation of, to 

 abundance of given spe- 

 cies of, 415. 

 to natural classification, 



413. 

 to local conditions, 417. 

 relative number of parasites on 



males and females of, 403. 

 sex of individuals examined in 



study of parasites of, 402. 

 specific distribution of parasites 



of, 409. 

 waters in which collections were 

 made for Kelly's study of par- 

 asites of, 399, 400. 

 U. S. Fish Commission, 28, 169, 

 259. 

 National Museum, 290, 418. 

 University of Illinois, 20, 27, 185, 

 225, 229,268,348, 441. 

 of Indiana, 229. 

 of Pennsylvania, 542. 

 of Upsala, Zoological Museum 

 of, 164. 

 Urceolarime, 337. 

 urceolaris, Brachionus, 345, 353, 



379- 

 urceolata, Ditihigia, 319. 



Trachelomonas, 326. 



Urnatella gracilis, Cothurnia curva 



found 011, 341. 

 I roglena, 274, 421. 

 Utricularia, 349. 

 uvclla, Synura, 327. 



