152 



THE SPONGES OF THE WEST-CENTRAL PACIFIC 



U.S.N.M. No. 22987, My No. M. 365, collected July 5, 1949, by diver at 

 Ebon Atoll in the south corner of the lagoon in the miniature lagoon 

 which occurs there. The depth was 2 meters, and the substrate was 

 dead coral. The species was also abundant in this locality. 



U.S.N.M. No. 23050, My No. M. 429, collected August 1, 1949, by diver 

 in the eastern portion of Ponape (Matalanim) from a reef in the lagoon 

 near an entrance to the lagoon. The depth was 5 meters, and the sub- 

 strate was dead coral. The species was common here also. 



U.S.N.M. No. 22928, My No. M. 234, collected September 2, 1949, by diver 

 northwest of Koror near Ngarebagal Islet in the Palaus. The depth 

 was 3 meters, and the substrate was peculiar. This sponge was upon 

 another living sponge. It is possible that this species is abundant 

 throughout the entire region studied and that many specimens, being 

 small, are not collected by divers. 



Most of the specimens are thin crusts, but this is not to be described as 

 a typically incrusting species, because as growth continues it becomes thicker 

 and thicker until some specimens are as much as 20 mm thick. Thicknesses 



Text Figure No. 99. Spicules of Mycale armata, X 782. A: Tylostyle head and point; 



the mid portion is not shown, only the terminations. B: Raphides. C: Largest type of 



palmate anisochela. D: Second size of anisochela. E: Third size of anisochela. 



F: Smallest size of anisochela. G: Larger sigma. H: Smaller sigma. 



