of the Subfamily Asterinince. 481 



Paraslerina Fisher. Type, P. crassa (Gray), as Patiria. 

 Australia. P. obesa Clark. Chili ; Peru. 



FF. Rays not elongated and rounded. 



G. Dorsal plates of papular areas roundish, separated by naked 



skin, having papular pores. Ventral plates with one or two 



simple spines. 



Disasterina Per. Type, D. abnormalis Per. New Caledonia ; 

 also, D. ceylonica Dod. Ceylon. 



GG. Dorsal plates of rays thin, contiguous, not overlapping, 

 linear or narrow, transversely elongated, often bent, with 

 many small interpolated ossicles, all covered with even gran- 

 ules. Internally the plates are supported on an alveolar 

 structure. Ventral plates thin, each with a cluster of webbed 

 spines, those adcentral having about four to six in an irregu- 

 lar group ; admarginal ones with about three small ones in a 

 comb. Adambulacrai furrow spines in convex webbed fans 

 of four or five. 



Desmopatiria Ver., gen. nov. Type, D. flexilis, nov. Chili ? 



A A. Adambulacrai spines form a continuous webbed series, the 

 individual combs of three to five being united together ; no 

 spinules on outer surface. Dorsal and ventral plates and 

 interstices covered with a finely granulated dermis, which 

 also forms the web between the minute spines, in a fan, on 

 the ventral plates. No dorsal spinules. Papular pores form 

 six or more rows. Internal dorso-ventral columns are pres- 

 ent near margins. Form depressed pentagonal, with thin 

 margins. A few small ossicles between dorsal plates, usually 

 one. 



Stegnaster Sladen. Type, S. wesseli Per. Florida; Bahamas ; 

 W. Indies ; Colon. S. inflatus Hutton. New Zealand. 



II. Interradial areas of disk perforated vertically. Form large, 

 pentagonal, with the thick disk arched upward and the margins 

 thin; concave beneath. Dorsal plates strong, convex, imbricated, 

 larger papulary ones with spinules on the edge; others with 

 granules. Papular areas radial, petaloid, with numerous papulae. 

 Ventral plates with one or two flat spines ; outer surface of adam- 

 bulacrals with two ; inner margin usually with one spine. 



Tremaster Ver. Type, T. mirablis V. Newfoundland Banks. 



Asterina Nardo (restricted). 



Asterina Nardo, Oken's Isis, p. 716, 1834. Gray {pars), Ann. and Mag. Nat. 

 Hist., vi, p. 286, 1840; Synopsis, p. 16, 1866. Perrier, Revis. Stell., 

 Arch. Zool. Exper. et Gen., v, p. 214, 1876. A. Agassiz, North Ameri- 

 can Starfishes, p. 106, pi. xiv, 1877 (structure). Viguier, op. cit., vii, p. 

 207, pi. xiv, figs. 8-13, 1878 (structure). Sladen (pars). Voy. Challenger, 

 xxx, p. 388, 1889. Fisher (pars), op. cit., 19116, p. 254. 



Asteriscus (pars) Muller and Troschel, 1840, p. 104 ; Svst. Aster., p. 39, 

 1842. 



