6i6 



SYNOPSIS OF ANIMAL KINGDOM. 



IT. ECHINODERMAL SERIES. 



ECHINODEEMATA. 



Holothuridea. Holothiiria( Sea-cucumber), Synapta, Cheieodota, 



Achistrum. 

 Asteridea. Cribella (Star-fish), Goniastee, Astropecten, 



PaltBaster, Palaocoma. 

 Ophiuridea. Ophiocoma, Ophiura (Brittle-star), Eucladia, 



Ophioderwa, Protaster. 

 Echinidea. Echinus (SEA-uRcmx),BEissus,CiDAEis, Pygastee, 



Spatangus, Ananckytes, Melon it es, Micr aster. 

 Crinoidea. Pentacrixus (Sea-lily), C'omatula ( = Antedon), 



Actinocrinus, Apiocrinus, Cyathocrinus, 



Eucalyptocrinus, Hyatricrinus, Plati/crinus. 

 Cystidea. Apiocydites, Cryptocrmus, Echinoencrinites, 



Pleurocystites, Splicer onites. 

 Edrioasterida. Agehcrinites, Edrioad^r. 



Blastoidea. Astrocrinus, Codonaster, Pentremites. 



III. ANNULOID SERIES. 



1. TRICHOSCOLICES. 



Turbellaria. Planaria, Polycelis. 



Rotifera. Hydatina, Floscularia. 



Trematoda. Aspidogaster, Bucephalus, Distoma. 



Cestoidea. Taenia (Tape-worm), Ecliinococcus. 



ISTo fossil 

 forms. 



Myzostomata. 

 Gephyrea. 

 Hirudinea. 

 Oligochseta. 



Polychseta. 



a. Errantia. 



b. Tubicola. 



2. ANIIELIDA. 



Myzostomum. (No fossil forms.) 



Sipuneulus, "^'Epitrachyx ? 



Hirudo (Leech). (No fossil forms.) 



Lumbricus (Earthworm). (Some of the fossil 



worm-burrows may have been made by 



members of this group.) 



Aphrodita, 'Nereis, T*oljn'6e,AraheIlifes, Eunicites. 

 (Tracks and burrows probably made by members of 

 this o;roup are found iu many formations.) 



Arcnicola, Sabella, Sekpula, Spieoebis, Areni- 

 colites, Cormdiies, Vermicidaria. 



