164 BULLETIX 10(1. UNITED STATES NATIONAL MUSEUM. 



d^. Rays 8 to 10 ; inferomarginal spines usually 4 to 6, souietimes only 



3 in small specimens aspera, p. 171. 



c'. A small two-jawed pedicellaria just dorsal to the furrow spine; rays 10- 



avicularia, p. 172. 



LUIDIA LONGISPINA Sladen. 



Plate 43, fig. 5. 



Luidia longujnna Sladen, 1889, p. 254, pi. 43, figs. 3 and 4; pi. 45, figs. 

 3 and 4. 



Two specimens are larger than Sladen's type. The larger has 

 the following dimensions: E==74 mm., r=:10.5 mm., B,=7 r. The 

 specimens agree with Sladen's description. There is a fifth regular 

 series of abactinal paxillae. The paxillae, as noted by Sladen, are 

 distinctly spaced except along the median area of ray. 



Type. — In British Museum. 



Type-locality. — Challenger station 203, east of Panay Island, 

 Philippine Group, 20 fathoms, mud. 



Distribution. — Philippine Islands, from Samar and Panay to 

 Tawi Tawi; 18 to 24 fathoms, mud or fine sand. 



Specimens examined. — Five specimens from the following Philip- 

 pine stations: 



Station 5157, 3.3 miles northeast Tinakta Island. Tawi Tawi 

 Group, Sulu Archipelago, 18 fathoms, fine sand ; surface temperature, 

 79° ; 1 small specimen. 



Station 5182, off eastern Panay (3.7 miles southeast Antonia 

 Island), 24 fathoms, fine sand, mud; surface temperature, 80°; 3 

 specimens (1 very young). 



Station 5209, off western Samar (1.8 miles northeast Taratara 

 Island), 20 fathoms, green mud; surface temperature, 84°; 1 

 specimen. 



LUIDIA PRIONOTA Fisher. 



Plate 41, figs. 5, 5a ; plate 45, figs. 1, 2. 



Luidia prionota Fishkr, IDlSc, p. 202. 



J>iagno.'iis.Sm\'\h\v in general form to Luidm forfcifera Sladen. 

 but differing in lacking entirely adambulacral pedicellariae, in hav- 

 ing i)i'oximally at least 5 adambulacrn] spines in tiddition to the 

 ■curved furrow spine, the 4 outer forming 2' longitudinally oriented 

 pairs: central spinelets of paxillae not granulifonn : marginal spine 

 usually longer than extreme width of inferomarginal phitf; actinal 

 intermediate pedicellariae usually absent. Kays 5. 11=32 mm., 

 r=5 mm., R=6 r; breadth of ray at base, 6 mm. Abactinal surface 

 slightly arched, usually plane on radial region of ray ; inferomar- 

 ginals slightly arched, forming a broad border to actinal surface; 

 marginal spines fairly long, single, forming a prominent frinire to 

 .ambitus. 



