488 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



absence as far as our material shows of A. mdo. Both species occur 

 off the Hawaiian IsLands in shalloAv water. In the Malay region 

 Millett notes the rarity of A. mdo, occurring at but two stations, 

 while A. boscii was more or less scattered over the area. In the 

 Kerimba Archipelago, off the east coast of Africa, Heron-Allen and 

 Earland note the abundance of A. melo and the scarcity in compar- 

 ison of A. ioscii. In the Philippine material A. hoscii is, at the shal- 

 low-water stations, especially on the eastern side of the Sulu Sea, very 

 abundant, while I have made no records of A. melo in all the material 

 examined. With the data given by Millett it would seem that in its 

 distribution from the Hawaiian Islands to the Red Sea, it does not 

 extend far northward in the Malayan and Philippine regions. 



Worthy of special remark is the finding of beautu'ul microspheric 

 specimens of A. hoscii, confirming in all details Chapman's observa- 

 tions on the two forms from the Great Barrier Reef of Australia. 

 The two forms are here figiu-ed. 



The species was not found outside the region of the eastern bor- 

 der of the Sulu Sea except at D5192, in 32 fathoms (59 meters), oft' 

 northern Cebu, and D5218, in 20 fathoms (37 meters), between 

 Burias and Luzon. This may be due in part to the fact that shallow- 

 water collecting was most extensively carried out in this region. In the 

 Sulu Sea, off western Mindanao, Busilan, Siasi, Jolo, and Tawi Tawi, 

 it occurred in great abundance in material dredged from 10 to 38 

 fathoms (18 to 70 meters). At one station, D5153, in 49 fathoms (90 

 meters), off Tawi Tawi, the specimens were smaller; and at D5172 

 a specimen was obtained in 318 fathoms (582 meters) — an especially 

 deep record for this species. 



It was not found in the region to the south, largely for the reason 

 that the material from that region is from much deeper water. 



Aheolina boscii — Material examined. 



