104 



j\h-. W. K. Fi.slici's Notes on Asteroidea. 



as of sccomlaiy ini|)oitance in true FrcyeUa, which is really 

 not very closely relatotl to the ^enus containing F. fecunda. 

 The latter is tli.stingnishcd by a syzygy, well-developed 

 marginals ibr the interbrachiuni, and serial gonads. 



For the genus, which I called Frei/ella, I propose the name 

 Frei/ellaster, with Freyellaster fecundua (Fisher) as type. In 

 this group belong FreyellasUr spatnlifer (Fisher), Macassar 

 Strait, 901 fathoms; Freyellaster scalaris (A. H. Clark), 

 Galapagos Islands, 812 fathoms; and j»robably also FreyelUi 

 poJycnoma, Terrier. 



The group which I termed FreyiUideaw'xW therefore become 

 FreyeUa, with Freyella spinosa as type, and Freyellidea will 

 drop ont as a synonym. 



The Genus Hymenodiscus, Pcrricr. — In the paper on the 

 Brisingidse above referred to, this genus was not placed in 

 the synoptical key owing to lack of data. I have since 



Fij?. 1. 



Fig. 2. 



Fig. 1. — Hymenodiscus rif/assizt. An interbracLium from above first 



marginal plate:?, dotted. 

 Fig. 2, — Hymenodiscus ayassizi. An interbrachiuni from actinal side. 



fl, ndambulacral plates ; am, ambulacra! plates ; i, interradial ; 



m, marginals ; o, mouth-plates. 



examined Peirier's type in the Museum of Conijiarative 

 Zoology (no. 1448) *. The type of Hymenodiscus ayassizi 

 is almost certainly a very immature specimen, as it is small, 

 and there are no gonads. There are no skeletal arches on 

 the rays and the greater part of the thin abactinal integument 



* For description see Perrier, 1884, ' Memoire sur les ^toiles de mer 

 recueillies dans la mer des Antilles,' p. 189, pis, i. & ii. 



