coo 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 43. 



ASTROPECTINID^E . 



Astropecten acanthifer phragmorus. 

 Astropecten eremicus. 

 Astropecten luzonicus. 

 Astropecten tenellus. 

 Astropecten pedicellaris . 

 Ctenopleura astropectinides . 

 Ctenophoraster diploctenius . 

 Psilaster gotoi. 

 Psilaster rohustus. 

 Astromesites compactus. 

 Perse phonaster euryactis. 

 Persephonaster anchistus. 



Mimaster notahilis. 

 Pseudar chaster oligoporus. 

 Aphroditaster microceramns. 

 Paragonaster ctenipes hypacanthus. 

 Paragonaster stenostichus . 

 Perissogonaster insignis. 

 Rosaster nannus. 

 Rosaster mimicus. 

 Rosaster mamillatus. 

 Nymphaster euryplax. 

 Nymphaster dyscritus. 

 Nymphaster mucronatus. 

 Nymphaster leptodomus. 

 Nymphaster moluccanus. 

 Nymphaster arthrocnemis . 



Persephonaster luzonicus. 

 Persephonaster tenuis. 

 Persephonaster midticinctus . 

 Persephonaster suluensis. 

 Persephonaster cediplax. 

 Persephonaster habrogenys. 

 Persephonaster monostoechus. 

 Tritonaster evorus. 

 Dipsacaster diaphorus. 

 Patagiaster sphscrioplax. 

 Dytaster (Koremaster) evaulus. 



G0NIASTERir),T<^ 



Nymphaster meseres. 

 Nymphaster habrotatus. 

 Nymphaster atopus. 

 Ceramaster smitki. 

 Peltaster cycloplax. 

 S phieriodiscus scotocryptus. 

 Iconaster perierctus. 

 Astroceramus lionotus. 

 Astroceramus spKierlostictus . 

 Calliaster corynetcs. 

 Astroihauma euphylacteum. 

 Anthenoides granulosus. 

 Anthenoides lithosorus. 

 4.nthenoides rugulosus. 



Family PORCELLANASTERID^. 



SIDONASTER PSILONOTUS, new species. 



Differing from S. vaneyi and S. hatlieri in the almost entire absence 

 of abactinal spinelets. R = 22 mm., r = 1 1 mm. ; R = 2 r. Breadth of 

 ray at distal edge of cribriform organ, 7 mm.; width of cribriform 

 organ 6.5 mm.; height, interradially, 4 mm. 



Abactinal integument devoid of spinelets except for about 24, 

 scattered close to each cribriform organ, and not extending distally 

 beyond the edge of this organ. Spinelets about as long as those on 

 surface of cribriform organ. Papulae numerous, prominent, and 

 occupying a pentagonal area, the corners of which touch the middle 

 of each cribriform organ. Abactinal plates, spaced, microscopic, 

 perforated, roundish, or irregular in outline. Cribriform organs very 

 prominent, wider than high, with slightly convex upper border, and 

 leaving, only a very narrow bare area on distal edge of the plates. 

 Superomarginals with a single, slender, prominent, sharp spinule, 

 usually bent transversely across the smooth abactinal integument, 

 and with a shorter companion on the second plate. Superomarginals 



