NO. 1944. NEW QENERA AND .SPECIES OF STARFISHES— FISHER. 613 



c'. Superomarginals very tumid with the transverse ridge situated at middle of 

 plate, and evenly rounded from inner to outer edge; furrow spines 9; mar- 

 ginal fan of oral spines, 3 or 4, not prominent vixiUidnrtxni. 



c'. Superomarginals less tumid and with the transverse ridge situated lietween 

 center and distal margin of plate ; an appreciable angle between the dorsal 

 and lateral surfaces; inferomarginals broader, with less crowded, slenderer 

 squamules: furrow spines 7 or 8; marginal fan of mouth spines 5 to 7, 



prominent suluensis. 



h^. Marginals tumid, the inferomarginals being narrow and provided usually with 

 an erect conical spine at upper end of plate, above the appressed, longer 

 spines of the lateral comb; superomarginal spines in a single series along ray, 

 passing from the inner edge of plate toward outer, after the fifth plate. 



monostoechus. 



a^. Marginal plates not massive, the superomarginals being small, squarish, and 



tumid, with a spine near center, and sometimes on the outer part of ray more 



than 1; the inferomarginals naiTow but with a well-marked actinal face; rays 



depressed; paxillae rather spaced and delicate. 



?)'. Rays broader; inferomarginals at base of ray about two-thirds to three-fom'ths 



as long as wide; no actinal series of spinules; more than 1 series of suboral 



spines, the mouth plates as a whole larger; marginal and subambulacral 



fasciculate pedicellarise ; fuiTow spines 6 or 7 cediplax. 



b-. Rays slenderer; inferomarginals narrower, the width not exceeding length, 

 except on first 2 plates; 2 or 3 actinal inferomarginal spinules proximally, 

 in addition to lateral comb; only 1 series of suboral spines; no marginal or 

 adambulacral pedicellarise; furrow spines 5 or 6 habrogenys. 



PERSEPHONASTER EURYACTIS, new species. 



11 = 92 mm., r = 23 mm., R = 4 r; breadth of ray at base, 24 to 26 

 mm. Rays depressed, broadly lanceolate, abruptly constricted near 

 tip into a very attenuate, sharp extremity; interbrachium abruptly 

 rounded-angular; superomarginal plates broader than long, and 

 after the first half dozen, confined to abactinal surface; each tumid 

 plate with a transverse, appressed comb of 3 to 7, flat, sharp spines; 

 inferomarginals much broader than long, the outer tumid end bearing 

 a comb of about 5 prominent, sharp spines; proximal plates with a 

 second lateral comb of 3 to 5 spines covered by the first; curved 

 furrow comb of 6 or 7 rather long spines; subambulacrals proximally 

 about 6 in a single irregular series; actinal intermediate plates 

 extending two-thirds length of ray. 



Type.—Csii. No. 30520, U.S.N.M. 



Type-locality. — Station 5297, Verde Island Passage, off Batangas 

 Bay, Luzon (lat. 13° 41' 20" N.; long. 120° 58' E.), 198 fathoms, 

 mud and sand. 



The paxillas are medium sized, low, arranged in slightly oblique 

 transverse series on rays, at the base of wliich 6 or 7 transverse series 

 correspond to 2 superomarginals. The spinelets usually stand erect 

 in a compact flat-topped roundish group, causing the paxillse to be 

 spaced about one-half their diameter apart. Fifteen to 20 peripheral 

 and 10 to 15 central, slender, terete, blunt spinelets, longer than tlie 

 stout pedicel, compose the crowm of the larger paxillae. J^Iany of the 



