534 General Notes. 
are that while there is a second flagellum in some of the Peridi- 
nidæ, in others of the old group of Cilio-flagellates there are true 
cilia in the equatorial grove or scattered over the surface of the 
and hence the group must be retained. It is interesting to 
note that while Dr. Stokes has given names to nearly 250 new 
species of Infusoria in his various papers, he has carefully refrained 
from adding to the number in the present contribution. 
Two Cases or SymMmBIosIs.—Dr. ©. P. Sluiter notices two 
instances of “ mutualismus ” as occurring in the seas of Batavia. 
In shallow water there is found a large sea anemone (Actinia) 
protection from enemies among the tentacles. In one case, Dr. 
Sluiter removed several fish from their protector and placed them 
in an aquarium with several larger fishes. The little ones tried 
their best to hide among the corals and the spines of the echino- 
derms, but soon fell victims to the appetites of their cousins. 
hers placed under similar conditions, but in company wii 
anemones, survived for over half a year. ey prove very timid, 
and rarely venture but a short distance from home. Their food is 
mostly the droppings from the Actinians table. 
he second case, also noticed by Sluiter, occurs between Bunodes 
and Trachichthys clarkii. In this instance but a single fish hi 
been found with each anemone, but this, as it is larger than its 
relative, ventures farther from home in search of . Incase a 
bit of food be dropped near the Bunodes, the fish darts out and, 
Eartu-Worms.—N. Kulagin communicates (Zool. Ane a 
of note. The cuticle, composed of H, C, O and N, is n 
chitin, but might be called a precourser of it. e fect bY 
in weak hydrochloric and other acids, and to prevent this € 
the humus acids in which the worm lives, the ectoder y 
secrete an alkaline fluid. The egg cocoons differ much, as on 
withstand strong acids and pepsin. The fluid of the mouth 
