22 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Previous to the Albatross expedition Gotuopecten and Prionnster^ 

 two well-marked genera composing the Goniopectininae, were known 

 only by a single species each from the West Indies. A very different, 

 nearly subgenerically distinct species of Goniopecten was collected 

 in the Philippines, and 3 new forms of Prionaster were added, one 

 of which is close to the type, while the others are entirely different. 

 The capture of a very distinct Ctenodiscus in the Philippine and 

 Moluccan region greatly extends the range of this genus. 



A new species of the Indian genus Sidonaster was added, and the 

 range of Sidonaster vaneyi greatly extended. 



The number of new, delicate deep-water Astropectens and of new 

 Persephonasters, Luidias, Benthopectens, Kosasters, and Nymphas- 

 ters is perhaps noteworthy. 



The following genera previously known only from distant Atlantic 

 stations have provided each a new species : Radiaster (olim Mimas- 

 ter) , Ajyhrodit aster, Peltaster, Marginaster, and Myxaster. 



The well-known Diflofter aster multipes is represented in Celebes 

 waters by a small species or subspecies apparently most nearly re- 

 lated to the Japanese variant of true multipes. 



Additions to genera first made known by the Albatross in Ha- 

 waiian waters in 1902 are as follows : 



G tenophoraster (second species). 



Tritonaster (second species). 



Patagiaster (second species). 



Astroceramus (third and fourth species). 



Among the new generic types the following are rather isolated: 

 Benthogenia, Atelorias, Dissogenes, Tarachaster, Bythiolophus. 



The following are also monotypic, but their nearest relatives are 

 fairly obvious and are indicated in parentheses : 



Astromesites {Persephonaster) . 



Anthosticte {Tethy aster, Moiraster). 



Perissogonaster {Paragonaster) , 



Pontioceramus {Eugoniaster and Plinthaster) . 



Astrothauma {Calliaster). 



Halityle {Culeita and Oreaster; a second species subse(|ueii(ly 

 described). 



Xenorias (Rhipidaster). 



Hymenasterides {Hymenaster). 



Additional new genera : 



Ctenopleura (Astropecten) . 



Koreraaster {Dytaster). 



LithosoTna {leonaster). 



Paranepanthia (Nepanthia). 



Freyellastcr ( Freyella ) . 



Brisingenes {B rising a) . 



