37 



INDEX TO GENERA. 



The page referred to is that on which the genus is diagnosed or otherwise defined. 



The trivial names following each generic name are all those found associated with it in the 

 Synopsis, whether as valid specific names or as synonyms. 



Varietal names are included among the trivial names in alphabetic order, and each 

 is followed by the specific name to which it belongs. 



Acrocidaris, 83 : censoriensis, depressa, formosa, minor, nobilis, striata, 



tuberosa. 

 Acrocladia, 137. 



Acropeltis, 85 : aequituberculata, concinna. 



Acrosalenia, 139 : annularis, aspera, boloniensis, bouchardi, complanata, conformis, 

 crinifera, decorata, depressa, elegans, exile, granulata, gratiosa, hemi- 

 cidaroides, interpunctata, koenigii, laevis, lamarckii, lens, loweana, lycetti, 

 meriani, minuta, patella, pisum, pustulata, radians, radiata, rarispina, 

 spinosa, tenera, tuberculosa, virgulina, wiltoni. 



Agarites, 113. 



Agassizia, 394 : scrobiculata. 

 Amblypneustes, no. 



Amblypygus, 255 ; americanus, apheles, arnoldi, dilatatus, michelini. 



Amphidetus, 406 : cordatus, depressus, sartorii, subcentralis, virginianus. 



Amphiope, 235 : bioculata, bisperforata, elliptica, perspicillata. 



Ananchytes, 329 : analis, bicordatus, carinata, cinctus, conica, conoidea, cor-avium, 

 corculum, cc rdata, crassissima, cruciferus, elato-depressa, ellipticus, eudesii, 

 fimbriata, gibba, gravesii, hemisphaerica, latissima, minor, monardii, 

 ovata, pilula, pyramidata, rustica, scutatus, semi-globus, spatangiformis, 

 striata, subglobosus, sulcatus, tuberculata. 



Anaster, 217 : studeri. 



Anorthopygus, 188a (1858) : costellatus. 



Arachnoides, 230 : placenta. 



Arbacia, 113: conica, conjuncta, depressa, forbesi, globosa, globulus, granulosa, 

 hieroglyphica, jurassica, minima, monilis, nodulosa, pilos, pulchella, 

 richeriana, spadae. 



Archaeocidaris, 153: kaiserlingii, koninckii, nerei, prisca, triserialis, urii, ver- 

 neuillana. 



Archiacia, 324 : cornuta, gigantea, sandalina, santonensis. 

 Asteropyga, 83 : radiata. 

 Asterostoma, 196 : excentricum. 



Boletia, 133. 



Botriopygus, 278 : campicheanus, coarctatus, cotteauanus, cylindricus, elegans, 



meyeri, minor, nucula, obovatus, ovatus, sueurii, testudo, toucasanus. 

 Breynia, 408 : carinata, crux-andrae, magna, sulcata. 



Brissopsis, 378 : alarici, angusta, borsoni, branderiana, contracta, crescenticus, 

 decliva, duciei, elegans, genei, intermedia, latior, lyrifer, nicoleti, obliquata, 

 oblonga, ovata, romuli, scutiformis, sismondae, sowerbyi. 



Brissus, 403 : antiquus, carinatus, columbaris, cordieri, cruciatus, cylindricus, 

 declivis, dilatatus, expansus, fragilus, helveticus, imbricatus, inaequalis, 

 jutieri, latus, oblongus, placenta, rana, scillae, subacutus. 



Brontia, 182 : lachmundi, prima. 



Caratomus, 249 : avellana, faba, gehrdensis, hemisphaericus, latirostris, orbi- 

 cularis, peltiformis, rostratus, sulcato-radiatus, trigonopygus, truncatus. 

 Cardiaster, 344 : ananchytis, benstedis [sic], bicarinatus, bourgeoisanus, cinctus, 



