ILLUSTRATIONS XXIX 



FIGURE PAGE 



551. A Sea-cucumber (Psyckropotes longicaitda) from the deep sea. From A. 

 Agassiz, after Theel i88 



552. A Brachiopod, or Lamp Shell (Terebratula cubensis); lamp shells, in 

 spite of the name, have no affinities with molluscs. From A. Agassiz, 

 after Davidson 190 



553. Another Brachiopod {Terebratula caput-serpentis) which is very common 

 on the Xew England coast north of Cape Cod, below the low tide mark, 

 opened to show the food collecting mechanism. From .\. .\gassiz, after 

 Davidson igo 



554. Another Brachiopod {TerebratuUna caillcti). From A. Agassiz, after 

 Davidson igo 



555. A southern Brachiopod {Waldheimia floridana). From A. Agassiz 190 



556. A different type of Brachiopod [Platydia anomioides). From \. Agassiz, 

 after Davidson igo 



557. The same, opened. From A. Agassiz, after Davidson igo 



558. An Arrow- worm, or Chaetognath {Sagiita, sp.). From A. Agassiz 190 



55g. A rare and curious Sea-urchin {Porocidaris sharreri). From A. Agas- 

 siz igo 



560. A worm-like colony of fresh water Polyzoans (Cristatella mucedo) which 



is able to crawl about as if it were a single animal, .\fter .\llman ig2 



561. A palm-like colony of Polyzoans {Naresia cyathiis) from deep water. 

 From Wyville Thomson 192 



562. A colony of Polyzoans {Mucronella pavonella) growing on a piece of 

 stone. From Lankester 192 



563. A moss-like colony of Polyzoans {Bon'crbankia piistulosa). From Lan- 

 kester 192 



564. An enlarged cluster of the pol>T)ides of the preceding; some of the 

 animals have their tentacles expanded. From Lankester 192 



565. A group of the zooecia, or little structures enclosing the individual ani- 

 mals, from the colony shown in fig. 562. From Lankester 192 



566. Part of a coral-like Polyzoan colony {Porina subsidcata). From A. 

 Agassiz 192 



567. Part of the colony of a similar t>T3e {Biflustra macrodon). From A. 

 Agassiz 192 



568. A common and widely spread Polyzoan {M embrani pora canariensis) . 

 From .\. .\gassiz 192 



569. A common North Atlantic Polyzoan {Tessadroma boreale). From A. 

 Agassiz 192 



570. A small portion of the preceding, much magnified. From A. Agassiz, 

 after Smitt 192 



571. A plant-like Polyzoan colony {Cellidaria cermcornis). From .\. Agas- 

 siz 192 



572. A small part of the preceding, much magnified. From \. Agassiz 192 



573. The Palolo Worm {Eunice viridis). From Wood worth 196 



574. A Worm {Tomopteris) that lives freely floating in the sea. From A. 

 Agassiz 196 



575. A characteristic deep sea Worm {Slhenelais simplex). From A. Agassiz 196 



