GENERAL INDEX. 



275 



I«ake Mendota, Wis.— Continued. Page. 



nannoplankton 24i< 242 



shallow waters compared with those of Lake Green. . 271 



temperatures, summer 1919 259 



Lake Michigan, mussels 108 



Lake Michigan. Traverse Bay region, mussels 99 



Lake Pepin, Minn., mussels 88, 



89,93,97,98, 103, 108, 109. 118,141, 159, 164 



Lake Pokegama, Minn., mussels 91, 118 



Lake St. Clair, Mich., mussels 99 



Lakes of Middle Western States, mussels 98 



Lakes of Upper Central States, mussels 99 



lamprey. genital and visceral organs , . , 188, 189 



largemouth black bass, distribution and food 256, 



259, 265. 268,269 



Lepidosteus, genital and visceral organs 188, 201 



Lepisosteus osseus, distribution and food 259, 269 



Lepomis incisor, distribution and food .... 256, 259, 264, 268, 269 

 Leucichthys: 



birgei. distribution and food 256, 26s, 268 



peritoneal membranes, ovaries, and oviducts 197 



sp., distribution and food 259.269 



limnological observations on the Finger Lakes of New 



York (see Finger Lakes, N. Y.) 209-252 



loach, ovary 191 



Lost Lake, Ind. , mussels 92 



Lyons. Mich. , mussels 1 10 



Madison, Ark., mussels 109,128 



Mallotus, oviduct 191 



Maumee River, mussels 92. m 



Micropterus dolomieu, distribution and food . . 256. 265, 26S, 269 



salmoides 256,259, 265, 268, 269 



migration, seaward, of chinook salmon in Coltmibia and 



Sacramento Rivers 1-74 



Minnesota streams, mussels 108, no, 118 



minnow , distribution and food 269 



blunt-nosed ^ 256, 266. 268 



Mississippi River, mussels 80,84.89-92,93. 



96,97,98,100, 102, 104, 109, no, 112, 114, 

 115, 118, 119, 120, 125,127,137,163,167 



Missouri River, mussels 96,99,102,114-123 



Muraenidse. genital organs 188, 190- 191 



mussels, fresh- water, natural history and propagation. . 75-182 



animal associates 119 



breeding 85 



age begun 137 



brood pouches 138 



deposition of eggs, seasons 140 



fertilization 138 



incubation of eggs, seasons 140 



xnarsupia 13S 



ovulation 138 



byssus, species known to have 158 



Chillicothe 109 



commensalism 119, 120 



commercial species 98, 101, 107,141, 152,154 



competition for food 120 



conditions of existence 81 



conservation 80, 155 



culture 137,163 



aquaria 94, 137, 163, 165 



crates 84,109,127,137, 159, 164 



pens 164 



ponds 101,125. 126, 127, 137i1S9ji63, 164 



tanks or troughs 84,92,93, 125* i26> 165 



density of population 84 



mussels, fresh-water, etc. — Continued. Page. 



digestive gland 1 73 



distribution (see also habitat) — 



banks of streams. efTects 97 



barriers in streams, effects 96 



horizontal 97 



longitudinal 95 



diversity in form of shell 1 70 



enemies 122 



environment (see habitat) 94 



external features of shell 168 



Fairport (Iowa) Fisheries Biological Station, ponds, 



tanks, etc 80,84,92,93, 



94, 100, 109, 114, 121,125,126,127,137, 

 138. 140. 143. 150, iss. 159, 160, 163, 165 



Feeder Canal. Fort Wayne, Ind 84,92, 101 



feeding habits 86, 1 14 



food 79> 87 



algae 88, 89, 90, 92 , 93 



animal matter 90 



Clark . H . Walton . observations 91 



competition for 120 



desmids 93 



detritus 88, 90 



diatoms 88,89,92,93 



discrimination under normal conditions 89 



feeding habits 86, 1 14 



fish meat 90 



flagellates 92 



mineral matter 88,114 



mud -. 93 



observations 88, 90, 91 , 93 



organic matter 88, 114 



Palmellales 90 



pickerel blood 90 



plankton 88, 92, 1 14 



Schrader. Franz, observations 88 



Shira. A. F.. observations 93 



significance of problem 87 ' 



tadpole tails 90 



utilization of food materials 89 



vegetable matter 89, 90 



water content 88, 114,120 



form of shell, diversity in 170 



foot 173 



gills 173 



glochidium 143 



ax-head type 148 



hooked type 144 



bookless or apron type 144 



mature, months found 141, 142 



Gulf of Mexico drainage 8a 



habitat 94 



body of water 94 



bottom loi 



canals 100 



current m 



depth 107 



dissolved gases 117 



lakes . . . 97, ioi,io2, 103, 108,111,115,117, 118, 124, 125 



light iro 



marshes 100 



minerals in solution 114 



ponds 100, loi. 103. 109.115,121,124, 125,126,159, 165 



sloughs 100, 103 



streams 94,101,102,105,109,111,116,117,118,123,125 



