6.  Some perfectly spherical transparent bodies, 0.18 inches in diameter; these neither moved nor showed any signs of life when placed in salt water, but another animal, exactly resembling them in shape and colour, with the exception of having some light brown spots on it, unrolled itself like a wood-louse, and then swam nimbly about.  They all turned as white as eggs soon after they were put into spirits.

We caught also several species of an animal with two tentaculae, which had been also taken on the 17th June, some of these were very large and beautiful, being of the most delicate amber colour.

Also many different sorts of medusa, particularly tubes of about 0.5 inches in length, with an apparatus shaped like a proboscis at one extremity of it.  These I have not attempted to describe.  In general the animals we caught this day differed altogether from those we had hitherto found during this voyage.  Some few were the same, but the great majority were new.

Many of the medusae and small gelatinous animals must be endowed with very acute sensibilities and perceptions, for they evinced extreme timidity if any substance approached them, and when plunged alive into spirits, their rapid movements and violent contortions repeatedly indicated acute pain; indeed so clearly that on this point there could be no mistake.

A mass of gelatinous animals, caught this day, gave out a slight electric shock.  Some of them were shaped like the portions of an orange, and they evidently were formed to fit into one another in the manner in which they were found, although they separated directly they were touched.

July 2.  South latitude 35 degrees 58 minutes; east longitude 17 degrees 54 minutes.

This day the ship went so fast that we could not catch anything.  The acalephae were not so numerous as they had been further to the north, but we saw more and larger medusae than I had ever before remarked.  It indeed appeared as if the acalephae diminished and the medusae increased in number after passing the 36th degree of south latitude.

July 12. ) South latitude 23 degrees 2 minutes; east longitude 0 degrees 26 minutes 45 seconds.  July 13. ) South latitude 21 degrees 55 minutes; west longitude 0 degrees 44 minutes.

The vessel went slowly through the water, but although the net was kept towing we could catch nothing, and there was no appearance of anything being in the sea.

July 14.  South latitude 20 degrees 52 minutes; west longitude 1 degree 49 minutes.

This day we caught a Velella of the following dimensions: 

Length of interior cartilage 1.1 inches. 
Breadth of interior cartilage 0.5 inches. 
Total length of blue base 1.7 inches. 
Breadth of blue base 1.0 inches. 
Height of centre of crest 0.5 inches. 
Rim round crest, in breadth 0.55 inches.