* 
1880. } Zoölogy. 739 
peared. They were not developed enough at the time to leave | 
the water, and so probably perished. 
„In one pool I found an abundance of the half-grown larva of H. 
pickeringu or Hyla versicolor, but they were the only Batrachians 
seen. Usually one can find as many as six varieties in this place. 
Either the tree toad larvæ were not hatched, or they have a way 
of caring for themselves when the water dries up, better than 
other species.—S. P. Monks. 
Fresu WATER JELLY FisH.—An adult medusa belonging to 
the order Trachymedusea, allied to Aglauropsis from the coast 
of Brazil, was observed by Mr. Sowerby in the tank in the water 
lily house in Regent’s Park, London, June roth. It occurred in 
great abundance in perfectly fresh water at a temperature of 90° 
Fahr. Mr. Sowerby observed the medusa feeding on water fleas 
(Daphnia). The specimens were adult males, and are described 
by Prof. Ray Lankester in Mature for June 17, under the name of 
Craspedacusta sowerbii. It was probably introduced from the 
West Indies. This is the first instance known of fresh water 
jelly fishes; Hydra and Cordylophora being, so far as we are 
aware, the only fresh water Hydroids. The succeeding number 
of the same journal contains additional valuable descriptions of 
the same medusz by Prof. Allman and Mr. G, J. Romane 
_ Zoorocicar. Nores.—It seems that kangaroos have increased 
in the Australian colonies so as to become a serious evil. On 
one run, in the Stanhope district, it was computed that there 
were at least 60,000 head of marsupial animals, every one o 
visited by Mr. Inglis, there were 40,000 head of sheep, and the 
owner had destroyed more than that number of kangaroos. 
It is well known that snakes swallow their young in case of dan- 
ger; Mr. E. G. Blackford now states that ten sharks, two feet in 
length and apparently about six months old, were taken from the 
stomach of a mackerel shark (Lammna punctata), as if they had 
got there to avoid danger. Still it is probable that sharks may 
* eat their young. Mr. W. S. Ball, of Greensboro, N. C., com- 
plains that swarms of honey bees attacked his grapes, “ destroy- 
ing nearly half.” —The first part of a new volume, the first, of 
Bronn’s Thier-reichs, on the Protozoa, by Dr. O. Bütschli, has 
appeared. This will undoubtedly prove to be the best general 
work on these organisms, and will be of much interest to micro- 
scopists. An English work on the Infusoria, by W. Saville Kent, 
is announced to begin to appear in the autumn in monthly parts. 
— In Prof. Newton’s article on the goose, in the Encyclopedia 
Britanica, he remarks that the predominance of the white variety 
in domestication may be due in part to the practice of plucking 
the birds alive, “for it is well known to bird-keepers that a white 
feather is often produced in place of one of the natural color that 
