ASTEROIDEA OF NORTH PACJFIC AND ADJACENT WATERS — FISHER. 163 



Siibfainily IiII'l^A.STERIlN.aC Verrill. 



Genus *HIPPASTERIA Gray. 

 Genus *EVOPLOSOMA Fisher. 

 Genus *CRYPTOPELTASTER Fisher. 



WuT^family LKl'TOGONA-STKIilN^K Perrier. 



Genus *OGMASTER von Martens. 



Genus *LEPTOGONASTER Sladen, including ANTHENIASTER Ver- 

 rill. 

 Genus *ANTHENOIDES Perrier. 

 Genus *STELLASTER Gray. 



CHITO^TA-SXERI^^^E new subftDnily.o 



Genus CHITONASTER Sladen. 



AJVTHElSrEIlV^E new subfamily. 



Genus *ANTHENEA Gray. 



Genus PSEUDOREASTER f> Verrill (GONIASTER Perrier, but not 

 Agassiz). 



NOTES ON CERTAIN GENERA OF THE GONIASTERIDj;. 



Paragonaster. — Paragonastcr is classified by Sladen in the Pentagonasteridse 

 while Pseiularchaster and Aphroditasfer arc placed in the Archasterida;. Perrier 

 classes all three in the same subfamily (AstrogoniiniB) of the Pentagonasteridje. 

 Paragonaster is evidently close to Pseiidarchastn; as the adambidacral armature, 

 mouth plates, actinal intermediate plates, and iuferomarginals are very similar in 

 the two groups. The unpaired prominent tooth at the inner angle of the combined 

 mouth plates is a good correlative character to indicate relationship, and is one used 

 by Perrier (1S94, p. 337). Verrill (1899, p. 196) also places Paragonaster next to 

 Pseudar chaster and ApJiroditaster. 



Nectria.— Through the kindness of Dr. H. L. Clark, I have received for examina- 

 tion two specimens of Nectria, one from "Australia," Xo. 474, Museum of Compara- 

 tive Zoology, and the other. No. 1932, from "Westemport, Victoria." 



The former specimen seems referable to .V. oceUifera Lamarck, but the latter with 

 R about SO mm. is possibly a new species, as it differs in having the tabula of the 

 abactinal plates very flaring at the top, hiding the papular spaces beneath, and in 

 possessing numerous abactinal and fewer actinal slender jawed foraminato pedi- 

 cellarise. Perrier and Viguier state that the genus lacks pcilicellaria?. 



The following notes on the anatomy were made from the larger specimen: 

 The abactinal plates are in the form of relatively very large tabulate parapaxillae, 

 the crown of which flares greatly and is covered with close .set granules. The base 

 is not so large as the crown and is five- or sLx-lobed. The lobes of adjacent |)lates 



classed in the Ilippa.'fteriinae on the basis of the actinal skeleton and the few and hea\'y adambularral 

 spines. The pcdicellarise are more characteristic of the Goniasterina" although of a form not unknown 

 in the Hippasteriina; (as, for example //. cali/omica). The two aberrant {;enera Gilbcrlasler and Cladastcr 

 have been here classed at the end of the Goniasleriina?, rather than within the Hippasteriina?. If other 

 species are discovered which disprove the value of the abactinal features referred to, it will l>c well to 

 replace Cladastcr, at least, in the Hippasteriinff. 



a The unusual characters of Chitonaster fully warrant its segregation in a separate subfamily. 



* Pseudoreaster Verrill, 1899, p. 148; type, Asterias obtiuangulus Lamarck. 



