Annelida - segmented worms Pl. 38/40 “Errant” Polychaetes p.166 Lepidonotus squamatus Lepidonotus scale worm Pl. 43 p. 169 Nereis virens Sand (or Clam) worm Pl.38, p.176 Greenish Glycera dibranchiata Blood worm Pl. 40, p.171 Reddish "Sedentary" Polychaetes p. 182 Sabellidae Sabellaria vulgaris Sand-builder worm Pl. 42, p. 189 Sand patches Serpulidae Hydroides dianthus Pl. 42, p. 195-6, Hard limy-white tubes Spirorbis borealis Pl. 42, p.195-6 Hard limy-white spirals Hydrozoans - Cnidarians Tubularia crocea Sea Strawberries reddish/pink Pl. 13, p. 75 Hydractinia echinata Snail fur Fig. 16, p. 77-8 Dark brown Anthozoa Haliplanella luciae Striped anemone Pl. 12, p. 97 Reddish stripes Diadumene leucolena Ghost anemone Pl. 12, p. 98 Pale Echinodermata - Spiny skinned animals Asterias forbesi Sea stars/star fishes Pl. 63 p. 262 Variable color

Arthropods - Crustacea (jointed leg animals) Crangon septemspinosa Sand Shrimp - Pl. 54, p. 236 Sandy-colored to clear Gammarus Scuds or side-swimmers - spp. Pl.51, p.227 Whitish/clear Caprella Skeleton shrimp - spp. Pl. 53, p. 229 Whitish/clear Neopanopeus sayi Mud crab Pl. 59, p. 249 Dark brown-blackish Libinia emarginata Spider crab Pl. 60, 246 Brownish,charcoal Cancer irroratus Rock crab Pl. 61 P.246 Reddish-brown Balanus balanoides Barnacles (rock) Pl. 18, p. 215 White Balanus eburneus Ivory Barnacle Pl. 18, p. 215

Mollusca - Mollusks Bivalves: Crassostrea virginica Oyster Pl. 32, p. 148 D White Mytilus edulus Blue mussel Pl. 24, p.146 Dark blue to blackish Modiolus modiolus Horse mussel Pl.24, p. 147 Modiolus demissus Ribbed mussel Pl. 24, p. 146 Brownish Mercenaria mercenaria Hard clam/quahog - Pl. 28, p. 152 White Mya arenaria Soft clam Pl. 28, p.158 Sometimes discolored dark/charcoal Gemma gemma Gem clam Pl. 25, p.153 Tiny and white Anomia simplex Jingle shell - Pl. 24, p. 149 Yellowish, orange, whitish

Mollusca Univalves: Crepidula fornicata & convexa & plana Slipper shell Pl. 24 Whitish Littorina littorea Periwinkles Pl. 20, p.126 Dark Nassarius trivittatus Basket snail (New England Dog whelk) Pl. 20, p.131 Light Nassarius obsoletus Mud snail Pl.20, p.131 Dark Urosalpinx cinera Oyster drill Pl. 20, p.130 Pale brown or even orange color Eggs (Of oyster drill Yellowish and mud snail White) Often abundant on the front of the HSC and sometimes (Mud) thoroughly covering the dorsal) Tunicates Sea Squirts (first found June 2002) Molgula manhattensis Sea Grapes Pl. 17, p. 272, (Gills) Ashy gray, translucent

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Updated 1/1/07