594 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



Sta. 85. Aug. 12, 1955. Iwayama Bay, between south shore of Kaibakku 

 (Island xxix) and Kogai-hant6, Auluptagel Island: 7° 19' 12" N., 134°29'37" 

 E. (H. O. 6076, 2d ed., 1944). fApproxinnately the same locality as Sta. 30 

 but a few feet west.) Depth 5-6 ft.; sand and coral, with vegetation of 

 Enhalus, Caulerpa, and Halimeda. (Pseudoceros fvlvogriseus, n. sp.) 



Sta. 92. Aug. 14, 1955. Iwayama Bay; south end of Gua-zima (Island xv): 

 7°20'00" N., 134°29'37" E. (H. O. 6076, 2d ed.). Depth 0-20 ft.; sandy 

 flat and fringing reef, with vegetation of Enhalus, Halimeda, Padina. (Acero- 

 tisa rugosa, n. sp.) 



Sta. 133. Aug. 28, 1955. Iwayama Bay: south shore of Island 11 (traverses 

 viii, ix, x), 7°19'20" N., 134°29'15" E. (H. O. 6076, 2d ed.). Reef flat covered 

 with 2-3 feet of water at mean low tide, with pool about 15 ft. deep; bottom 

 coral and sand, with Enhalus, Halimeda, and Padina. (Nymphozoon bayeri 

 n. sp.) 



Sta. 220. Oct. 12, 1955. Iwaj^ama Bay: east side of Oyster Pass (Kaki-suid6) 

 between Island xxix and east end of Koror. 7°18'57" N., 134°30'09" E. 

 (H. O. 6076, 2d ed.). Bottom limestone, with living and dead coral, depth, 

 3-20 ft. {Aquaplana pacifica, n. sp.; Leptoplanidae, juv.) 



Sta. 220a. Oct. 22, 1955. Locahty as for Sta. 220. {Acerotisa rugosa, n. sp.) 



Sta. 236. Oct. 18, 1955. Iwayama Baj^, somewhat north of position of Sta. 

 220: 7°19'00" N., 134°30'11" E. (H. O. 6076, 2d. ed.). Limestone shelf 

 with living and dead coral, depth 3-20 ft. {Acerotisa rugosa, n. sp.) 



Sta. 236a. Oct. 20, 1955. Locality as for Sta. 236. {Pseudoceros ferrugineus, 

 n. sp.) 



Sta. 254. Oct. 27, 1955. Outer reef (called Raeldil) south of Ngaremediu, east 

 cape of Urukthapel Island: 7°14'37" N., 134°27'11" E. (H. O. 6078, 1st 

 ed.). Reef flat with sand patches among living and dead coral, depth 2}^ to 

 3}i ft. (awash at spring tides); collected by the light of gasoline lanterns, 

 just before midnight. {Plehnia tropica, n. sp.; Pseudoceros ater, n. sp.). 



Sta. 258. Nov. 2, 1955. East side of Urukthapel Island, in small bay north of 

 Ngaremediu Peak, at end of trail leading to Palau Lighthouse (not func- 

 tional): 7°15'57" N., 134°26'55" E. (H. O. 6103 xx ed.). Bottom sand and 

 limestone, with living and dead coral; Enhalus and Halimeda. {Lepto- 

 planidae, juv.). 



References 



Abe, Noboru 



1937. Ecological survey of Iwayama Bay, Palao. Palao Trop. Biol. Stat. 

 Stud., vol. 1, No. 2, pp. 217-324, 42 figs. 

 Abe, Noboru; Eguchi, M.; and Hiro, F. 



1937. Preliminary survey of the coral reef of Iv.ayama Bay, Palao. Palao 

 Trop. Biol. Stat. Stud., vol. 1, No. 1, pp. 17-35, 1 text fig., 2 pis., 

 chart. 

 Blanchard, Emile 



1847. Recherches sur I'organisation des vers. Ann. Sci. Nat., Zool., vol. 8, 

 pp. 271-275, 2 pis. 

 Bock, Sixten 



1913. Studien uber Polycladen. Zool. Bidr., vol. 2, pp. 31-344, 67 figs., 

 8 pis. 



