34 JOHNS HOPKINS UNIVEESITY MORPHOLOGICAL MONOGRAPHS. 



about seven A. M. A light breeze was blowing and there had been a 

 heavy shower a half -hour previous. 



38. The usual time of towing was about 6.30 to 7.30 A. M. The 

 water was four to five feet (1.2 to 1.5 m.) nearest shore but deeper 

 farther out. At this time of day one could count on getting plenty 

 of the larger sized (15 to 20 mm.), many small ones, but very few of the 

 smallest. This was the experience of several mornings. 



On August 12th I towed about nine A. M., and got but few of the 

 larger sized, many small, ones, and very many of the smallest. 



The next day (7.00 to 7.45 A. M.) those obtained were mostly of 

 the larger size. On the same day (3 P. M.) others of the party towed 

 at the same place and obtained but few. 



On another day I towed in the afternoon (3 to 4 p. M.) and 

 obtained great numbers as I usually did in the morning. 



39. We towed about 7.30 to 8.30 at night. Very few Charybde* were 

 taken. On this evening we towed five times in the same locality, 

 and obtained but seven or eight specimens. Towing with the same 

 net on our way home, it was filled with Aureliae and five or six 

 Charybdeae. It seems as if Charybdea came to the surface at night. 

 Those towed in the evening were dead the next morning. 



The next morning Richard, our colored attendant, towed from 

 5.30 to 6.30. There were heavy showers. The usual find of large and 

 medium ones was obtained. There were only two with planulae. 



40. The material of September 2nd was obtained about six A. M. 

 They were mostly of large size. In all only fifteen or twenty were 

 taken. Richard explained the small number by saying that the 

 bottom had changed in the locality where we usually towed and that 

 he got no weeds in his net, but mud. 



The next day more were brought in by Richard (6.30 A. M.) 

 There were rather more than yesterday but the quality was the same. 

 There were three with planulae. 



On another morning Richard brought in a great many, about a 

 hundred. Among these there were three with planulae (light-colored 

 and budding); on a previous day there was one with the reddish- 

 brown kind and with a mouth. 



Activity of Charybdea. 41. a. About five o'clock in the morning a 

 Charybdea was taken in the tow. It was in good condition 

 swimming incessantly round and round without change of direction, 



