180 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Specimens examined. — Six, the type and 5 from the following 

 Philippine localities : 



Station 5189, Tanon Strait, east coast of Negros, 300 fathoms^ 

 green mud, bottom temperature 62.8° ; 1 specimen. 



Station 5402, near type-locality, 188 fathoms, gTeen mud, bottom 

 temperature 56.8° ; 1 specimen. 



Station 5404, 6.8 miles northwest Ponson Island, Dupon Bay, 

 Leyte, 190 fathoms, mud, bottom temperature 55.4° ; 1 specimen. 



Station 5406, same locality (10.2 miles northwest Ponson Island), 

 298 fathoms, mud; 2 specimens. 



Remarks. — L. gymnochora — the name referring to the bare spaces 

 between the inferomarginals — shows a great resemblance to L. 

 denudata Koehler from the Coromandel coast, India, 133 fathoms. 

 This resemblance concerns not only the superficial appearance, but 

 the structure of the skeleton, including the form of the paxillae. 

 As enumerated in the diagnosis there are a number of important 

 differences, chief among which are the broader inferomarginals of 

 gymnochora^ the broader dorsolateral paxillar bases, broader actinal 

 bare spaces, and the presence of numerous abactinal, inferomarginal, 

 actinal intermediate, and subambulacral pedicellariae. 



The looseness and flexibility of the skeleton, along with the rela- 

 tively large size of the tube feet suggests that this form can swim. 

 It would be interesting to know if the tip of so many rays has been 

 lost in an effort to escape from enemies or from actual attacks of 

 other animals. 



Family ARCHASTERIDAE. 



Genus ARCHASTER MuUer and Troschel. 



Archaster Muller and Troschel, lS40a, p. 104. 



ARCHASTER TYPICUS Muller and Troschel. 



Archaster typicus Muller and Troschel, 1840ff, p. 104. 



About 900 specimens were taken at the following localities : 

 Point Jamclo, Luzon, with seine, 3. 

 Nasugbu, Luzon, reef, 5. 

 Subig Bay, Luzon, shore, 31. 

 Santiago River, Pagapas Bay, Luzon, 3. 



Tilig, Lubang, 5 medium-sized specimens and about 800 young 

 with R, 5 to 15 mm. 

 Olongapo, Luzon, 2. 

 Sablayan, Mindoro, tide pool, 1. 

 Romblon Island, east of Tablas Island, shore, 16. 

 Pandanon Island, between Cebu and Bohol, 2. 

 San Pascual, Burias, tide pool, 3. 

 Busin Harbor, Burias. shore. 8. 



