34 JOHNS HOPKINS UNIVERSITY 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. mM. The 
water was four to five feet (1.2 to 15m.) 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 (8 Pp. 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 Charybdez 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 Aureliz and five or six 
Charybdez. 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 (630 a. Mm.) 
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, 
