FRESH-WATER MUSSELS AND MUSSEL INDUSTRIES. 
19 
ORDER IN WHICH DIFFERENT SPECIES AND THEIR RELATIONS ARE CONSIDERED, WITH THE PLATE NuM- 
BERS AND PacEs—Continued. 
Class, group, and common name. 
The Quadrula class—Continued. 
The pimple-back group—Continued. 
Scientific name. 
Plate. 
Purple Bepiens| Da yapet haa arate Via siets/Biarniatoraistehs PeGadrella praniferdliccntes ccs sa cai ciated se oases 
Purple pimple Hack) oF ies iid ave deo esiesiee sce (Quadrula tuberculata].......6.....6.0.0. 0005. . 
‘Three-horned warty-back]............0..00005 [Gbigdatia rehexa]..)\cs mute cecetia cs tdecctas.s 
The pig-toe group— 
TE CELSO 25 Geo Se Mec OEM EC OBOE GACnoUs aaarad Ouadrigka Wridatae watienrccociisen titeetefieltentias «at 
DHIG River DIE-LOE Lads... pi ajese pieces aivenielrieryy Quadrula obliqua, . 
PTR EN atin Se stiokiects varmeeilcie him avis belWnivieee © Quadrula plena........ 
Bg COG Et oe os en aig be raibin rine tisle(e “tleiys. the sip" Quadrula pyramidata. . 
Mat wieperiteddes imme smenae ss ele aeabis’s ovens Quadrula coccinea...... 
Wrabash pip-t0e ss cis ikpree sary ie ngtle aie. 0% anaes Quadrula rubiginosa. «00.6.0. cc cs eer esevemecenes 
The blue-point group— 
Nie pyre oy are set eenpertole «vig bie cene’g anys Quadvitla nlicate so. caceint er erccniedjewys vies t ence 
UTECT ARE Certs te uisie cetivicie’s Veivice slsciccle nia siels Quadrula undulata 
atm lake sheer as ects ss saenaseins tne sie > os Quadrula perplicata. 
Quadrula elliottii)... < 
Qua MemeTI 1, wore ch sleeve adda sha aes 
The washboard group— 
Washboards oy tw-asiecge > comes bsp tacit cosy MACE AeTORen sy Fey poe 8) ap h diprds shil- dees > 
Washboard.... .| Quadrula boykiniana. . 
[Bank-climber] . (Quadenia trapezoides] . 4 
PCH ee cere os ceba be salcsiais cose chiles ritogonia tuberculata.............ceeceeeeeeeee XI 
The Lampsilis class: 
The mucket group— 
WMiicket $35 rch sun tusxs Phan peje nme cos are Fe of Lampsilis ligamentina................06 2000.0 150,00 8 APP ey 
[Rainbow-shell] . .| (Lampsilisiris]............ p20 0 a Re 8 
Southern mucket. . .| Lampsilis ligamentina gibba. BIBLE, toreveihn avetess 
PEDSppUEN TS OM ecret sate a sicicle cistern orci inipisteceieineorrcistas ote Lampsilis higginsii........ oi pia ataly ala steiays 
5 Lampsilis orbiculata. Wye: 9 sabac freee 
Fat mucket, Lake Pepin mucket.............. Lampsilis luteola.... I, XV, XVI... 
Southern fat mucket 
Lampsilis hydiana. . 
F Plagiola securis.......--++0+++5 
[Plagiola elegarisls tsk eneecsccecasongivonessosns 
Tanipgilis yentrrcon@ esp as vie nd stestets a ma.ceds ae 
Lampsilis ovata]... ‘ 
Lampsilis capax].. . 
Lampsilis purpurata 
Lampsilis multiradiata].... 2.0.0.0... 000.0000 eee 
‘The sand-shell group— 
Wellow: sard-sitell renatal trie. synieisialo cvle\ate ante Lampsilis anodontoides. .....- 2.2.00. ....000005 
Slough sand-shell. . .| Lampsilis fallaciosa.... i 
Black sand-shell Lampsilis recta........ ; 
{Lampsilis subrostrata].....--- 0.0.00... cece ee ees 
Miscellaneous groups: 
The bullhead group— 
Bullhead Pleurobema aesopus......0+2.e.cccccceeecteeeees 
.| Cyprogenia irrorata......--..+.. 
-| Dromus dromas............+++.. 
.| Symphynota costata...... 
(Ptychobranchus phaseolus] 
Symphynota complanata. ...........0..00..00.. 
FR heel-splitter, Lampsilis alata]........ 
Rock pocketbook Arcidens confragosus] 
The elephant’s-ear group— 
Blephant's ears... 2. --er eens cence reece eee. Unity crasstdleris oe 5 sa ai as ciin << bo coat e Remand 
Let oaee Leia Mace B OMe rte occ ttle cuidate WRG BIDDOSUS Tt tite. core Saas vee ceieteres XXIL 
Noncommercial species— 
SI GALT MP hakitiion sail cielvt ores inid.c coca be Date dha Anodonta Prandishy.vieersdPuihadidis tes tdeecces 
Slop-bucket] ... ..| [Anodonta corpulenta]............:eeeeseeeesnes 
Paper-shell] .. Anodonta suborbiculata] ........... 0000. ececuee 
Paper-shell] .. Anodonta imbecillis]... ....-.0.sccseceeseeneeees 
‘Squaw-foot].... Strophitus edentulus]......-...6. 00sec eee eee ees 
Spectacle-case] |... ..qsveeewrsecen nes Margaritana monodonta]... 0.6.6.6... cece eee 
River pearl mussel]]................. Margaritana margaritifera]...................05. xXXI 
Paper-shell]., 0.2.20 scecsersecoeess Teanipsilis gracilis]: cite ccs scans wsa.. auheesveuaus 
Paper-shell).......--..0002005 Lampsilis levissima]..........06..000ceeeee eens 
Paper-shell].....,...---9.--05 Pa AMLSRELOSTLS Patt |) es enw ae ep cisions anehee ee 
The Spheriidz] ..| (Species undetermined)... 0.0... .6 66.0 cece eevee 
Page. 
QUADRULA CLASS. 
This includes the niggerhead, the pimple-back, the blue-point, the washboard, and 
others of minor importance. 
Nearly all of the mussels thus classed together are short- 
term or summer breeders. This means that the eggs are fertilized and incubated in 
