Figure 13. Common bryozoans. (A) Schizoporella 

 errata (colony to 30 cm wide), and (B) Bugula neritlna 

 (to 12 cm high). Redrawn from Spitsbergen (1980). 



14A), and the 

 interrupta . 



pale green Ascidi a 



Large motile subtidal invertebrates 

 include the starfish Asteri as forbesi i 

 (Figure IOC), the purple sea urchin, 

 Arbacia punctulata (Figure 10D), the stone 

 crab, Menippe mercenaria , and the blue 

 crab, Cal 1 i nectes sapidus . The most 

 common crab is the somewhat smaller, 

 orangish mud crab Neopanope savi . Hermit 

 crabs are represented by the flat-clawed 

 Pagurus pol 1 icari s , the long-clawed 

 Pagurus longicarpus , and the much larger 

 CI ibanarius vi ttatus , which has yellow 

 stripes on the walking legs. The small, 

 tube-building gammarid amphipods Ampithoe 

 (Figure 10A) and Corophium spp. are common 

 in summer. In winter, caprellid amphipods 

 ( Caprella spp.) are abundant. Many kinds 



B 



Figure 14. Common tunicates. (A) Styela pllcata (to 

 13 cm high), (B) Molgula manhattensis (to 4 cm high), 

 and (C) Aplidium stellatum (colony to >30 cm wide). B 

 redrawn from Lippson and Lippson (1984), C redrawn 

 from Gosner(1978). 



of snails are present, including the 

 small, seed-shaped, brown lunar dove 

 snail, Astyris lunata , the larger greedy 

 dove snail, Anachis avara, the sculptured 

 top snail, Cal 1 iostoma eugl yptum , the 

 Atlantic oyster drill, Urosalpinx cinerea 

 and the Florida rock shell, Thai s 

 hemastoma floridana. 



19 



