404 



U.S. NATIONAL MUSEUM BULLETIN 287 



simpsoni 



strongyla 



subcircularis 



subsida 



tach nodes 



tersa 



toreumata 



vernicosum 

 Mantellum 



caloosana 



carol inensis 

 'Margariona 

 Margarites (Margarita) 



althorpensis 



asperrima 



condoni 



corallicus 



ecarinatus 



elevatus 



erythrocoma 



euspira 



excavatus 



filogyra 



frigidus 



grosvenori 



healyi 



hypolispus 



imperialis 



inflatula 



iris 



johnsoni 



kamchaticus 



lacunella 



lissocona 



lubrica 



maculata 



marginatus 



minona 



miona 



nitens 



pauperculus 



peninsularis 



pribiloffensis 



rhodia 



rossica 



rudis 



samanae 



scabriuscula 



shannonicus 



simblus 



tampaensis 



vorticifera 

 Marginalia 



albuminosa 



amiantula 



amina 



anticlea 



aurora 



avenella 



ballista 



bellula 



canilla 



cassis 



cineracea 



dacria 



domingoensis 



elegantula 



eremus 



esther 



eulima 



evadne 



faunula 



fernandinae 



floridana 



fusina 



gabbii 



gravida 



gregaria 



halensis 



immaculata 



immitator 



impagina 



incessa 



inepta 



inepta 



infecta 



intensa 



latissima 



limonensis 



macdonaldi 



microgonia 



monitor 



myrina 



newmani 



ocella 



onchidella 



parallela 



pardalis 



politula 



posti 



praecursor 



precursor 



seminula 



silicifluvia 



styria 



tampae 



tanora 



torticula 



watsoni 



willcoxiana 



yucatecana 

 Marinula 



colonia 

 Martesia 



hawaiensis 



oval is 

 Mathilda 



amaea 



barbadense 



georgiana 



globulifera 



granifera 



hendersoni 



lacteosa 



plexita 



rushii 



scitula 



yucatecanum 

 *Maugerella 



conspicua 

 *Maynardia 



agassizii 



niteloides 



pineria 

 *Mazatlania 

 Mazzalina 



costata 



oweni 

 Megalomastoma 



curtum 

 Megalomphalus 



californica 



caro 

 Megatebennus 



cokeri 

 Megerlia 



disparilis 

 Meiocardia 



agassizii 



hawaiana 

 Meioceras 



cingulatum 



lermondi 

 Melampus 



crosseana 



hemphillii 

 Melanella 



abida 



anachorea 



callistemma 



cinca 



corrida 



fernandinae 



