94 Proceedings of the Biological Society of Washington. 

 27. Aetobatus narinari (Euphrasen). 



SPOTTED STING RAY; LADY SKATE. 



This species visits the Cape Lookout region in considerable numbers. 

 I have killed as high as fifty in a single season, some of them of large 

 size, the largest being 12 feet in length and 7 feet 7 inches broad. 



28. Myliobatis freminvillei Le Sueur. 



EAGLE RAY. 



Never abundant, but I observe a few examples each year. I have noted 

 that this species gives birth to its young in pairs of two folded togetlier 

 witli head and tail in reverse position, there being three pairs. 



29. Rhinoptera bonasus (Mitchill). 



COW-NOSED RAY. 



This ray is not abundant. I rarely see more than a half dozen specimens 

 in a single season, and some years I have seen none at all. 



30. Mobula olfersi (Miiller & Henle). 



SMALL DEVILFISH. 



In July, 1910, I first captured this rare and practically unknown devil- 

 fish which had not previously been reported on this coast. Each year I 

 have recorded the time of their arrival and find the dates to be the same. 

 They first arrive in the bight of Cape Lookout on the night of July 6, 

 leave during the night of July 9, and return again on the night of July 

 24, leaving during the night of the 29th. They are later seen for some 

 days, playing on Lookout Shoals. They are seen at no other season of 

 the year. During the past four years I have captured nearly fifty of them, 

 yet they appear to arrive in about the same number each year, in a school 

 of about 100. 



31. Manta birostris (Walbaum). 



DEVILFISH. 



In July, 1909, I saw one of these rays, having a width of at least twenty 

 feet, leap from the water. In less than a minute it leaped the second 

 time, its form and the two cephalic appendages being plainly visible. 



