NO. 1944. NEW GENERA AND SPECIES OF STARFISHES— FISHER. 637 



ate; inferomarginals defining contour of ray; dorsal surface of ray- 

 nearly plane; normal marginal plates not tumid, though inferomar- 

 ginals with slightly arched ventral surface; adambulacral furrow 

 spines 4 or 5 on first few plates, these gradually increasing to 9 or 10; 

 oral spines 6 or 7. K, = 101 mm., r = 30 mm., R = 3.4 r; breadth 

 of ray at mid-interbrachium, 34 mm. 



Type.—Cat. No. 30544, U.S.N.M. ' 



Type-locality. — Station 5116, mouth of Balayan Bay, Luzon (off 

 Verde Island Passage, north coast of Mindoro), 200 fathoms; bottom 

 temperature, 50.2° F. 



N. mucronatus differs from N: helli, to which the form of the radial 

 plates would ally it, in having mucronate granules, larger madreporic 

 body surrounded by 6 plates, inferomarginals extending laterally 

 beyond superomarginals, larger, unequal acorn-shaped, often incipi- 

 ently mucronate, . actinal intermediate granules, smaller mouth 

 plates, and numerous, stout subambulacral spines. 



NYMPHASTER LEPTODOMUS, new species. 



In the form of the abactinal plates resembhng N. mucronatus, but 

 differing in having longer, slenderer rays, narrower superomarginals, 

 inferomarginals extending Httle or not at all beyond superomarginals, 

 subspherical, depressed, sometimes truncate abactinal granules, 

 abactinal, spatulate pedicellarise, larger mouth plates, 8 to 10 oral 

 spines, adambulacral pedicellariae, and no conspicuously enlarged 

 subambulacral spines. Rays very slender, varying from plane to 

 convex above, the mdth at inner end of the first pair of supero- 

 marginals wiiich meet medially equal to length of first 3 superomargi- 

 nals measured along side; adambulacral furrow spines proximally 6, 

 distally 10 or 11. R = 70 mm., r= 17.5 mm., R = 4 r, breadth of ray 

 at mid-mterbrachium, 20 mm. 



Type.— Cat. No. 30545, U.S.N.M. 



Type-locality. — Station 5216, between Burias and Luzon, 215 

 fathoms, green mud; bottom temperature, 51.9° F. 



* NYMPHASTER MOLUCCANUS, new species. 



Similar in general form to N. euryplax, but radial paxiUae smaller, 

 hexagonal, and not conspicuously -widened; petaloid papular areas 

 narrower and oral spines 10 to 12; margmal plates rather broad; ray 

 broad at base, the mdth at inner end of the first pair of supero- 

 margmals which meet medially equahng length of first 4J supero- 

 margmals measured on ambitus; adambulacral plates mth strong 

 furrow angle; minimum number of furrow spines at base of ray 8 or 

 7; maximum number 10 (rarely 11). R = 86 mm., r = 21.5 mm.; 

 breadth of ray at mid-interbrachium, 26 mm. 



Type.— Cat. No. 30546, U.S.N.M. 



