TWENTY-THIRD ANNUAL REPORT 99 



Potomac snail (fresh water) J'k'iparu.s vivipanis 



Japanese snail (fresh water) Viviparus mallratus 



Kresh- water mussel Anodonta implicata 



C RISTACEANS 



Whale barnacle - Coronula diadcvia 



Common rock barnacle Balanus halanoides 



Ivory barnacle Balanus ehurneus 



Goose barnacle Lepas anatifera 



Silver shrimp Palacmonetes vulgaris 



American lobster Homarus americanus 



Locust lobster Scyllarides aequinoctialis 



Spiny lobster PanuUrus argus 



Guinea-chick lobster PanuHrus fjidtatus 



Horseshoe crab Limulus poli/phemus 



Land Crab Gecarcinus lateralis 



Land Hermit crab Cenobites diogenes 



Hermit crab Eupagiirus pollicaris 



Hermit crab Eupagurus longicarpus 



Red Hermit crab Petrochirus hahamensis 



Fiddler crab Gelasimus pugilator 



Fiddler crab Vca minax 



Rock crab Cancer irroratus 



Blue crab Callinectes hastatus 



Stone crab Menippe mercenaria 



Ghost crab Ocypoda arenaria 



Spider crab Libinia emarginata 



Spider crab I/ibinia dubia 



^^ud crab Panopaeus depressus 



Green crab Carcinus granulatus 



T>adv crab Platyonychus occellatus 



Long-armed spider crab Lamhrus pourtalesn 



Oyster crab Pinnotheres ostreum 



Bermuda sand crab Calappa flamma 



Gulf-weed crab Portnnus sai/i 



Red crab Carpilius coralUnus 



Jonah crab Cancer borealis 



Turtle crab Nautilograpsus minutus 



Sand shrimp Crangon vulgaris 



Mantis shrimp Squilla empusa 



Sand Bus; Hippa talpoida 



Sand Flea Orchestra agilis 



Sand Flea Talorchestia longiconiis 



Wood Borer or Gribble Limnorea lignorum 



Salt water shrimp ; Gammarus locust a 



Fresh-water Crayfish Cambarus a finis 



