3IO CLASSIFIED RESUME OF ORGANISMS OBSERVED 



moment that they were Sagitta, and then knew them un- 

 questionably. Their pointed ends were perfectly distinct. 

 They jerked a little in different directions, but kept amaz- 

 ingly quiet for creatures of this group. In the laboratory 

 both Amphioxus and Assymetron dart about, coming to 

 rest only on the bottom. The deep-sea forms seemed to 

 have sufficient buoyancy to keep quietly suspended in mid- 

 water. The great glare appeared to affect them not at all. 



The second group was composed of about twenty. They 

 came toward the sphere, swimming down the light beam 

 obliquely to my line of vision. The sight of a second lot 

 was wholly unexpected, and this time I saw several Sagitta 

 just above them, and the comparison left no room for 

 doubt. I call them Amphioxides because this is the only 

 form I have taken in my deep-sea nets. 



Although they were recognized only twice from the 

 bathysphere, Amphioxides must be fairly plentiful off 

 Bermuda, as they are common in the deep-sea hauls. A 

 dozen specimens are often taken in each net of a haul, 

 from the surface down to looo fathoms. 



Subphylum vertebrata 



Class ELASMOBRANCHII 



Sharks appeared outside the bathysphere at loo, 250, 

 650, and 800 feet. The uppermost one, about two feet in 

 length, was a puppy shark, probably Carcharias platyodon. 

 A pilotfish {Naucrates ductor) swam just underneath. 



