one species (G. anomalus) : and especially Pisaster, which 

 has there eight, large, massive species (mentioned above, 

 p. 542). I am unable to refer with certainty any of the 

 species described as Asterias, from other regions, to this 

 group, as restricted, unless it be the six-rayed species, A. 

 Perrieri Smith, 16 from Kergnelen I. This agrees with 

 it closely. It is monacanthid and has large dentate pedi- 

 cellariae. 



Cosmasterias sulcifera (Per.) Sla., from southern 

 South America, is also pretty nearly allied to Pisaster, 

 but is diplacanthid and has few dorsal major pedicellate, 

 which are not particularly large. This is the type of 

 Cosmasterias Sla. and it seems better to keep the latter 

 name for this and allied diplacanthid species. It is evi- 

 dent, however, that these Antarctic forms are the nearest 

 relatives of Pisaster. 



Bunodaster, gen. nov., resembles Astropecten, but has 



•IW PW. Soc, Vol. 168, p. 273, pi. xvi. fig, 2-26, 1879. 



