463 



Costa Rica Miocenk — OLvSson 



291 



Auriculastrum 54 



Aurinia dubia 82 



mutabilis 81 



robusta 81 



Avicula inornata 367 



Balanophylla haleana. 27 



Balantium 43 



Barnea al atoidea 7 



Basilissa alta 157 



costulata 158 



superba 158 



var. delicatula 158 



var. depressa 158 



Basterotia ? prima j 20 



Bathoxyphus 3S 



Bela filifera 6S 



Benthodolinm 117 



Benthonella fischeri 140 



gaza 140 



nisonis 140 



Bittium boiplex .128 



cerithioide 128 



galvestonense 129 



gibberulum 128 



nigrum 128 



nugatoriu m 186 



varium 128 



yucatecanum 135 



Bivonia exerta 132 



Blauneria 56 



heteroclita 57 



pellucida 57 



Boreotrophon 99 



Borsonia cocoensis 8 250 



Bothrocorbula viminea 442 



Bowden beds, Jamaica 199 



Buccinum obesnm 92 



orbingyi 87 



patula 99 



zOnalis 94 



Bulimus monile 55 



Bulla 48, 49 



biblicata.. 50 



canaliculata 47 



paupercnla 2o6d 



recta 206a 



Bullaria abyssicola 51 



amygdala 2o6d 



occidentalis 50 



pauperculia 7... 194, 199,2060 



pinguiscula 51 



solida 51 



striata 50 



Bursa affinis 114 



crassa /8 190, 195, 200, 306 



Busycon canaliculatum 85 



carica 86 



eliceans 86 



perversum 86 



Py™m ^5 



Cadulus arctus 41 



amiantus 40 



carolinensis 40 



elongatus 40 



mayori 41 



parvus 40 



poculum 40 



quadridentatus 40 



transitorius 41 



turgidus 26 



Ceecum annulatum 130 



bipartitum 130 



carolinanum 130 



costatum 131 



glabrum 131 



instructum 130 



irregulare 1 30 



nitidum 132 



pulchellum 131 



