REPORT ON THE ASTEROIDEA. XXXI 



Genus 3. Moiraster, n. <ren. 

 . Genus 4. Astropecten, Linck. 

 Genus 5. Psilaster, Sladen. 

 Genus 6. PJioxaster, Sladen. 

 Genus 7. Batln/biaster, Danielssen and Koren. 

 Genus 8. Hyaster, Danielssen and Koren. 



Subfamily 2. LuidiiNyE, Sladen, 1887. 



Astropectinidre with the infero-marginal plates separated from the adambulacral plates 

 by a small intermediate plate throughout the ray. Marginal and adambulacral plates 

 correspondent in length' and number. 



Genus 1. Luidia, Forbes. 

 Genus 2. Platasterias, Gray. 



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

 see p. 175. 



Family IV. Pentagonasterid^e, Perrier, 1884. 



Phanerozonate Asterids with thick and massive marginal plates, which may be either 

 naked, or bear granules or spiniform papilla?. Disk largely developed. Apical plates often 

 increscent. Abactinal surface tessellate, with rounded, polygonal, or stellate plates, which 

 may be tabulate or paxillifonn. Actinal interradial areas largely developed, covered with 

 pavement-like plates, which may be naked, or covered with membrane, or may bear 

 granules or spinelets. 



Subfamily 1. Pentagonasterin^e, Sladen, 1S87. 



Pentagonastericlse with the abactinal area paved with rounded, polygonal, or paxilliform 

 plates. Granules or spinelets when present co-ordinated. 



Genus 1. Pentagonaster, Linck. 



Genus 2. Astrogonium, Midler and Troschel, emend. 



Genus 3. Calliaster, Gray. 



Genus 4. Chitonaster, Sladen. 



Genus 5. Calliderma, Gray. 



Genus 6. Iconaster, n. gen. 



Genus 7. Gnathaster, n. gen. 



Genus 8. Nymphaster, Sladen. 



Genus 9. Paragonaster, Sladen. 



Genus 10. Mediaster, Stimpson. 



Genus 11. Nectria, Gray. 



