376 NORTH AMERICAN FAUNA 61, FISH AND WILDLIFE SERVICE 



parviventris, on a cod at Tanaga Island, and L. salmonis, on a 

 humpback salmon (Oncorhynchus gorbuscha), also at Tanaga Is- 

 land. 



A species of PenneUa occasionally is recovered from whales at 

 Akutan Island. Inspector Van De Venter at the whaling station 

 said that no specimens were seen in 1938 and only one was seen 

 in 1937. 



BARNACLES 



Ordinary rock barnacles are common throughout the Aleutians 

 (fig. 6) . Balanus crenatus was collected by dredge at Atka Island. 



Two interesting species of barnacles attach to the skin of the 

 humpback whale (Megaptera nqvaeangliae) in the North Pacific 

 (Scheffer, 1939). Coronula diadema is a white, hard barnacle 

 that attaches to the skin, and Conchoderma auritum is a fleshy, 

 elongated species that attaches, in turn, to Coronula (fig. 7). A 

 fisherman said that Coronula is also found, though rarely, on the 

 lower jaw of the sperm whale (Physeter catodon) just below the 

 teeth. Two employees of the whaling station said that they had 

 seen barnacles only on the humpback. 



%t 



Figure 6. — Rock barnacles, Balanus sp., in tidal zone. 



July 10, 1937. 



Unalaska Island, 



