FRESH -WATER MUSSELS AND MUSSEL INDUSTRIES. 



19 



Order in which Different Species and their Relations are Considered, with the Plate Num- 

 bers AND Pages — Continued. 



Class, group, and common name. 



The Quadrula class— Continued . 



The pimple-back group — Continued. 



[Purple pimple-back] 



[Purple pimple-back] 



[Three-homed warty-back] 



The pig-toe group— 



Pig-toe 



Ohio River pig-toe 



Pig-toe 



Pig-toe 



Flat niggerhead 



Wabash pig-toe 



The blue-point group — 



Blue-point 



Three-ridge 



Round-lake shell 



The washboard group — 



Washboard 



Washboard 



[Bank-clLmber] 



Buckhom 



The LampsiHs class: 

 The mucket group — 



Mucket 



[Rainbow-shell] 



Southern mucket . . . 

 Higgin'seye 



Fat m.ucket, Lake Pepin mucket. 



Southern fat mucket 



Butterfly 



[Deer-toe] 



The pocketbook group — 



Pocketbook 



[Grandma] 



[Pocketbook] 



[Purply] 



The sand-shell group — 

 Yellow sand-shell . . 

 Slough sand-shell. . 

 Blaci sand-shell . . . 



Miscellaneous groups: 

 The bullhead group — 



Bullhead 



Fan-shell 



Dromedary shell 



[Kidney-shell] 



The heel-splitter group — 



WTiite heel-splitter 



Fluted shell 



[Pink heel-splitter] 



[Rock pocketbook] 



The elephant's-ear group — 



Elephant's ear 



Spike 



Noncommercial species — 



[Floater] 



[Slop-bucket] 



i Paper-shell] 

 Paper-shell] 

 Squaw-foot] 



[Spectacle-case] 



[River pearl mussel] 



[Paper-shell] 



[Paper-shell] 



[Paper-shell] 



[The Sphasriidae] 



Scientific name. 



Plate. 



[Quadrula granifera] 



[Quadrula tuberculata]. 

 [bbliquaria reflexa] . . . . 



Quadrula undata 



Quadnila obliqua 



Quadrula plena 



Quadrula py ramidata . 



Quadrula coccinea 



Quadrula rubiginosa . . 



Quadrula plicata 



Quadrula undulata. . 

 Quadrula perplicata . 

 [Quadrula elliottiil.. 

 [Quadrula neislerii] . 



Quadrula heros 



Quadrula boykiniana . . 

 [Quadrula trapezoides] . 

 Tritogonia tuberculata . 



Lampsilis ligamentina 



[Lampsilis iris] 



Lampsilis ligamentina gibba . 



Lampsilis higginsii 



Lampsilis orbiculata 



Lampsilis luteola 



Lampsilis hydiana 



Plagiola securis 



[Plagiola elegans] 



VI. 

 VI. 

 VI. 



vin. 



VIII. 



VII., 



XII. 



IX.. 



IX.. 



Page. 



XI. 



XII. 

 XI.. 



Lampsilis ventricosa. . . . 



[Lampsilis ovata] 



[Lampsilis capax] 



[Lampsilis purpurata] . . . 

 [LampsUis multiradiata] . 



Lampsilis anodontoides . 



Lampsilis fallaciosa 



Lampsilis recta 



[Lampsilis subrostrata] . . 



Pleurobema aesopus 



Cyprogenia irrorata 



Dromus dromas 



[Ptychobranchus phaseolus] . 



Symphynota complanata. 



Symphynota costata 



[Lampsilis alata] 



[Arcidens confragosus] — 



Unio crassidens . 

 Unio gibbosus.,, 



[Anodonta grandis] 



[Anodonta corpulenta] 



[Anodonta suborbiculata] . . 



[Anodonta imbecillis] 



[Strophitus edentulus] 



[Margaritana monodonta] . . 

 [Margaritana margaritif era] . 



[Lampsilis gracilis] 



[Lampsilis Isvissima] 



[Lampsilis parva] 



(Species undetermined) . , . . 



I. XIII 



XIII 



XIV 



XIV 



XIV 



I. XV, XVI. 



XV. 



XV, XVI. 



XVII 



XVII 



XVIII.... 

 XVIII.... 



I. XVI. XIX. 



XIX 



XIX 



XIX 



XX.. 

 XX.. 

 XX.. 

 XXI. 



XXII. 



XXII. 

 XXI.. 



XXIII. 

 XXIII. 



XXIV. 



XXVI. 

 XXV., 

 XXV.. 

 XXVI. 

 XXIV. 



XXVI. 



24 

 24 

 24 



24 



25 



25 



25 



25 

 25 



26 

 26 

 26 

 26 

 26 



26 

 27 

 27 

 27 



28 

 28 

 28 

 29 

 29 

 29 

 30 

 30 

 30 



30 

 31 

 31 

 31 

 31 



31 

 32 

 32 

 32 



33 

 33 

 33 

 33 



33 

 33 



34 

 34 



34 

 34 



35 

 35 

 35 

 35 

 35 

 35 

 35 

 35 

 35 

 35 

 36 



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 



