644 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



ASTROCERAMUS SPH.«;RI0STICTUS, new species. 



Similar in general appearance to A. lionotus but differing in having 

 1 or 2, rarely upward of 5, acorn-shaped, tubercular granules on the 

 middle of the abactinal plates; numerous abactinal, broadly spatulate, 

 or narrowly fan-shaped sugar-tongs pedicellarige; more numerous 

 marginal granules, scattered over the entu-e surface of marginal 

 plates; larger and more numerous actmal intermediate pediceUaria3 

 and coarser tubercular granules; more numerous subambulacral 

 pedicellarise ; proximally slenderer furrow spines; commonly only 1 

 larger subambulacral spine, or if 2, these frequently in a transverse 

 series; slenderer oral spines. R=73 mm., r = 22.5 mm., E, = 3.2 + r; 

 breadth of ray at proximal end of third pair of superomarginals 

 (wliich meet medially) equal to length of first 4§ superomarginals 

 measured on ambitus. Abactinal plates subcircular with a single 

 marginal moniliform series of tiny granules and 1 to several much 

 larger tubercular acorn-shaped granules in center; marginal plates 

 tumid, with uneven elevations bearing numerous deciduous granules 

 in lines and groups; actinal intermediate plates with 3 to 6 prominent 

 acorn-shaped tubercular granules on the surface and a single monili- 

 form series of subcorneal or subfoliaceous granules on the margin; 

 pedicellariae numerous, with 2 rather large, narrowly fan-shaped or 

 abruptly spatulate jaws; furrow spines 4 or 5, slender, and only a 

 trifle compressed proximally, distally markedly compressed; sub- 

 ambulacral spines heavy, clavate, proximally larger than in A. 

 lionotus, and sometimes furrowed near the tip; subambulacral pedi- 

 cellarise numerous, 1 to a plate, the jaws slender, spatulate, and 

 nearly or quite as long as the furrow spines. 



Type.— Cat. No. 30556, U.S.N.M. 



Type-locality. — Station 5135, 11.9 miles northeast of Jolo Light, 

 Jolo, Sulu Archipelago, 161 fathoms, fine coral sand; bottom tempera- 

 ture, 54.7° F. 



CALLIASTER CORYNETES, new species. 



Differing from C. cliildreni in having much heavier marginal and 

 actinal spines, and numerous pedicellarias; from O. pedicellaris in 

 having heavy actinal intermediate spines, more numerous and longer 

 furrow spines, and prominent spines in the center of disk; from C[ 

 haccatus in having longer spines generally, numerous pedicellarige, 

 more numerous furrow spines, and a few prominent abactinal spines 

 instead of tubercles all over the abactinal area. R = 40 mm., r=15 

 mm., R = 2.66 r; breadth of ray at base, 18 mm. Disk large, rays 

 rather slender and blunt, the interbrachia being wide and rounded. 

 Marginals very massive, wider on outer part of ray than the abactinal 

 area, very tumid, each bearing a very robust, rigid blunt spine (2 

 on first plate), the general surface of the plates being smooth; ter- 



