78 



INDEX. 



Cydas minor, C. B. Adams, 68 

 mirnbilis, Prime, 4(3 

 modesta, Prime, 37 

 modioli for mis, Anton, 54 

 moquiniana, Gass. 54 

 nitida, Migh. 63, 66, 70 

 nobilis, Gould, 41 

 orbicularia, Barratt, 46 

 ovalis, Prime, 41 

 pallida, Charp. 45 

 paranensis, D'Orb. 4 

 partumeia, Say, 46 

 patella, Gould, 42 

 pellacida, Prime, 51 

 ponderosa, Prime, 34 

 pulchella, D'Orb. 71 

 pulchella, Hanley, 70, 71 

 pyrjmea, C. B. Adams, 70 

 rhomboidea, Say, 34, 39 

 rosacea, Prime, 50 

 saratogea, Lam. 34, 35 

 securis. Prime, 49 

 sphaerica, Anthony, 50 

 similis, Say, 34, 35 

 simplex, Prime, 37 

 solida, DeKay, 34 

 solidula. Prime, 36 

 staminea, Conrad, 38 

 striatella, Fer. 54 

 striatina, Lam. 34, 37 

 stdielllptica, M. & H. 59 

 sulcata. Lam. 34, 35 

 sulculosa, Charp. 40 

 tenuis, Prime, 47 

 tenuistriata, Prime, 37, 38 

 transversa, Say, 48 

 triangularis, Say, 36, 37 

 truncata, Linsl. 51 

 variegata, D'Orb. 5 

 veatleyii, C. B. Adams, 56 

 venezuelensis. Prime, 54 

 Oyclasidae, 1 

 Cyprina, 9 



Cyprina arenaria, Meek & Hayden, 31 

 Cyrena, iv, 1, 2, 3, 9, 10, 11. 12, 26, 30 

 Cyrena acuta, Prime, 21, 22 



scfjuilateralis, Desh. 22, 23 

 altilis, Gould, 15, 23 

 angulata, Desh. 26 

 anomala. Desk. 28, 30 

 autiqua, Fer. 6 

 arctata, Desh. 13, 16 

 boliviana, Phil. 27 

 californica. Prime, 23 

 culi/or/iiensiii, -Prime, 24 

 caroliniensis. Lam. 12, 13 

 colorata. Prime, 29, 30 

 cordiformis, Recluz, 25 



Cyrena cubensis. Prime, 29, 30 

 cumingii, D<sh. 24, 25 

 cuneata, Jonas, 6 

 cuneiformis, Fer. 7 

 dakotensis, J/, c^- //. 31 

 densata, Conrad, 31 

 floridana, Conr. 23, 28, 29,30 

 fontaineii. Carp. 18, 21 

 fortis. Prime, 17 

 fragills, Desh. 22, 23 

 yloltulus, Jonas, 6 

 injlata, Desh. 24, 25 

 intlata, Phil. 26 

 insiguis, Desh. 15, 16 

 intermedia, Meek & Hayden, 8 

 intermedia, Mdville, 8 

 isocardioides, Desh. 25 

 limosa. Gray, 5 

 maritima, C. B. Adams, 24, 



25, 27, 28, 29 

 meridionalis. Prime, 19 

 mexicana, Sowerby, 3, 12, 15, 



22, 23 

 vioreauensis, M. & H. 8 

 nitidula, Desh. 20 

 notabilis, Desh. 28 

 cbscura. Prime, 15, 28 

 occidentalis, M. -i^- II. 8 

 olivacea. Carp. 15, 17, 18, 21 

 ordinaria, Prime, 19, 20 

 panamensis, Prime, 24 

 paranacensis, D'Orb. 4 

 peruviana, Desh. 30, 31 

 placens, Hanley, 20, 21 

 puUastra. Morch, 26 

 radiata, Hanky, 13, 14, 15, 



16, 17, 20, 21, 24 

 recluzii. Prime, 24 

 regalis. Prime, 18, 19, 20 

 salraacida, Morelet, 29, 30 

 solida, Phil. 14, 19, 20 

 sordida, Hanley, 13 

 subquadrata, Desh. 24 

 triangula, v. d. Busch, 14, 15, 



23 

 truncata. Lam. 7 

 tumida. Prime, 26 

 varians, Carp. 15, 22 

 variegata, D'Orb. 5, 6 

 violacea, Lam. 10 

 Cyrenidx, 1 



Euglesia, 59 



Gallileja, 59 

 Geloina, 11 



Isocardium cor, 27 



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