477 Costa Rica 



Puncturella trifolium i66 



watsoni i66 



Purpura loo 



nodulosa loi 



nodulosum 305 



Pyramidella Candida 107 



crenulata loy 



dolabrata 107 



mitchelliana 10 



obtusoides / 10 



smithi 107 



thelma 108 



Pyrula abbreviata loi 



papyratia 1 19 



R 



Ranella 114 



clathrata 99 



crassa 306 



Retusa frielei 49 



Rhizochilus loi 



Ricinula nodulosa 305 



Rimiila 167 



asturiana 167 



Ringicula dominicaiia 194, 196, 



2o6d 



hypograpta 186 



leptocheila 47 



nitida 47 



semistriata 2o6d 



Rissoa acutiocostata 139 



chesneli 139 



percipitata 138 



Rissoina alabamensis 26 



browniana 139 



chesneli 139 



decussata 139 



elegantissima 140 



laevigata 139 



sagraiana 140 



Rochefortia minuta 2 20 



Rotella cryptospira 162 



S 



Sabatia bathymophila 50 



Miocene — Ousson 305 



Sangi-!ino]?ria alouata J2 432 



Santo Domingo Miocene 92 



Saxicavella alabamensis j 21 



Sayella 56 



Scalaria 102 



Scaphander librarius 49 



nobilis 49 



punctostriatus. 49 



watsoni 49 



Scaphella costaricana 187 



costaricensis 18 272 



junonia 81 



Scobinella morierei 7 251 



Sconsia bocasensis 75 309 



cocleana 75 187, 310 



laevigata 195, 200, 20I 



var. gabbi 75 308 



zone 193 



sublsevigata 200 



Seguenzia 158 



formosa 120 



iconica 121 



monocingulata 120 



trispinosa 120 



Sella adamsi 124 



Semele claytoni J2....194, 196, 431 



Isevis 191 



var. costaricensis j^....430 



langdoniana 2 18 



monroensis 2 19 



sayi j2.... 430 



Semicassis 118 



Seminella stearnsi 94 



Serpulorbis papulosa 75... 196, 200, 

 317 



sculpturatus 200 



Sigaretus 150 



gatunensis 186 



martinianum 150 



gabbi 186 



Siliquaria squamata 133 



limonensis 188 



modesta .134, 188 



