212 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 46. 



trabeculae (each of which joins the upper end of a superomarginal 

 plate) ; abactinal surface more or less swollen, and marked oflP into 

 regular triangular papular areas b}^ narrow trabeculae; whole surface 

 finely granular with minute 2-jawed granuliform pedicellarise; no 

 spines; actinal intermediate plates sharply marked off by sutural 

 grooves and covered with a close mosaic of unequal, smooth, very 

 compact granules; the 3 chevrons nearest furrow with an odd inter- 

 radial plate, the others without; furrow comb compact, perpendicu- 

 lar, with 8 to 11 slender spines, the aboral end of 1 comb slightly 

 overlapping the adoral end of the next younger comb. 



Type.— C&t. No. 32634, U.S.N.M. 



Type-locality. — Station 5165, Tawi Tawi group, Sulu Ai'chipelago, 

 9 fathoms, coral. 



This curious, large starfish has retained the phanerozoniate char- 

 acter of young Culcita. This feature and the more numerous abac- 

 tinal plates, regularly arranged triangular papular areas, and lack 

 of spines or tubercles gives it a very characteristic facies, recalling 

 somewhat a gigantic, tumid "Goniodiscus seise," but one without 

 tubercles. 



FamUy LINCKIID^. 



DISSOGENES, new genus. 



Disk large, slightly inflated; rays moderately long and slender; 

 whole body covered with small granules, obscuring the outlines of 

 all plates except the marginal, which are confined to side wall of 

 body, and are unarmed except for 1 to 3 small central spines on the 

 first 2 or 3 superomarginals; abactinal plates of 2 kinds, kregular, 

 mostly convex primar}^ plates with 2 to 4 semicircular excavations 

 on margin, overlying and bound together by secondary elliptical or 

 oblong connecting ossicles, all very irregular in arrangement; pri- 

 mary plates of disk with small rigid central upright truncate spine; 

 actinal intermediate areas with about 4 chevrons of similar longer 

 spines; actinal intermediate plates extending in a single series nearly 

 to end of ray, and a second series two- thirds the length of ray; 

 adambulacral armature with 4 or 5, sometimes 3, prominent, slender 

 furrow spines on a nearly straight furrow margin; subambulacral 

 spines 2 on disk, 1 on rays, a little longer and much stouter than 

 furrow spines. No pedicellariae. 



Type of genus. — Dissogenes styracia, new species. 



DISSOGENES STYRACIA, new species. 



Kays 5. R = 110mm., r = 28 mm., 11 = 4 r; breadth of ray at base, 

 about 34 mm.; rays tapering at first rapidly, then gradually to 

 pointed extremity; interbrachial arcs wide, rounded. Other char- 

 acters as in genus. 



Type.— C&t. No. 32635, U.S.N.M. 



