REPORT ON THE ASTEROIDEA. xxxix 



Subfamily 4. Valvasterin.-e, Viguier, 1878. 



Echinasteriihe with moderately developed disk and five rays. Abactinal plates regu- 

 larly disposed, bearing small isolated spinelets. Marginal plates with large valvate pedi- 

 cellarife. Actiual intermediate plates bearing one or more large flattened spinelets. 



Genus 1. Valvaster, Perrier. 



For a Synopsis of the Subfamilies and Genera included in the Family Echinasteridse, 

 see p. 536. 



Family VII. Heliasterid^e, Viguier, 1878. 



Cryptozonate Asterids with largely developed disk and very numerous short rays. 



Abactinal skeleton reticulate, with plates bearing isolated or grouped spinelets, but never 



composite or paxilliform. With double interbrachial septa. Armature of the adambulacral 



plates simple, monacanthid. 



Genus 1. Hdiastcr, Gray. 



Family VIII. Pedicellasterid.e, Perrier, 1884. 



Cryptozonate Asterids with a small disk and narrow subcylindrical rays. Abactinal 

 skeleton composed of narrow band-like plates, disposed longitudinally and transversely, 

 forming wide quadrangular meshes. With short isolated spinelets at the decussations. 

 Actinostomial margin defined by adambulacral plates. Ambulacral tube-feet biserial. 

 Numerous large forcipiform pedicellaria3. 



Genus 1. Pedicellaster, Sars. 



Family IX. Asteriid.e, Gray, 1840, emend. 



Cryptozonate Asterids with an irregular or subregular reticulate abactinal skeleton 

 composed of small unequal plates, which bear isolated or grouped spinelets. Actino- 

 stomial margin defined by ambulacral plates. Ambulacral tube-feet quadriserial. Pedi- 

 cellariae of two forms, forficiform and forcipiform. 



Genus 1. Asterias, Linne. 



Genus 2. Uniopliora, Gray. 



Genus 3. Calvasterias, Perrier. 



Genus 4. Anasterias, Perrier. 



Genus 5. Pycnopodia, Stimpson. 

 ? Genus 6. Coronaster, Perrier. 

 1 Genus 7. Astrclla, Perrier. 



