32 CLASSIFICATION OF THE ANIMAL KINGDOM. 



The Holothuroidea are often divided into primary sections, according 

 as they possess tube-feet or not. The families which are destitute of 

 tube-feet form the section Apoda, comprising the families Synaptidce, On- 

 cirwlabidce, and Molpadiidce. On the other hand, the families of the As- 

 pidochirotce and Dendrochirotce possess tube-feet, and form the section of 

 the Pediculata. 



OEDER V. CRINOIDEA (Sea-lilies). 

 Sub-ord. 1. Tesselata. 



Fam. a. *Cyathocrinidse. Cyathocrinus, Zeacrinus, 



Fam. &. *Poteriocrinidae. Poteriocrinus, Dendrocrinus. 



Fam. c. *Marsupitidse. Marsupites. 



Fam. d. *Rhodocrinidee. Rhodocrinus. 



Fam. e. *Taxocrinidae. Taxocrinus. 



Fam. f. *Anthocrinidse. Anthocrinus, Crotalocrinus. 



Fam. g. *Haplocrinidse. Haplocrinus, Coccocrinus. 



Fam. h. *Pisocrinidoe. Pisocrinus, Triacrinus. 



Fam. i. *Actinocrinidse. Actinocrinus, Periechocrinus. 



Fam. j. *Melocrimdse. Melocrinus. 



Fam. k. *Platycrinide. Platycrinus. 



Fam. 1. *Carpocrinidse. Hdbrocrinus. 



Fam. m. *Eucalyptocrinid8e. Eucalyptocrinus. 



Fam. n. *Glyptocrinidse. Glyptocrinus. 



Fam. o. *Gasterocomidse. Gasterocoma. 



Fam. p. *Cupressocrinid8e. Cupressocrinus. 



Sub-ord. 2. Articulata. 



* 



Fam. a. *Encrinidse. Encrinus. 



Fain. &. *Eugeniacrinidse. Eugeniacrinus. 



Fam. c. Pentacrinidse. Pentacrinus. 



Fam. d. Apiocrinidce. Rhizocrinus, Bathycrinus, *Bour- 



gueticrinus, *Apiocrinus. 

 Fam. e. Holopidse. Holopus, *Cyathidium. 

 Fam. f. *Plicatocrinidse. Plicatocrinus. 

 Fam. g. Comatulidse. Antedon (including the sub- 



geriera Comatula, Actinometra, Solanocrinus, Phano- 



genia, &c.) 



