226 
0. BADHAM. 
These pores are a conspicuous feature when the anemone 
is extended. The intake of fluid by the conchula is con- 
tinuous, and as these pores, which lead from the interior of 
the animal, are widely opened at such times, I consider that 
they serve to carry away the fluid taken in by the conchula. 
So that, in the attached larva, there is a constant stream of 
water, bearing food particles, going into the interior of the 
anemone through the conchula, and a stream of water passing 
out through the pores of the physa. It would appear as if the 
-conchula has been developed as a larval organ, correlated with 
Text-pig. 3. 
Drawing of the physa of a living larval Peachia hilli, showing 
the character and arrangement of the pores as seen when the 
anemone is extended and the pores open. 
the parasitic existence of the larval forms of the genus 
Peachia; and, associated with it, is the development of the 
pores of the physa. 
The manner in which the medusophilous larvae of Actinians 
take in their food has not been elsewhere described. Haddon ( 1 ) , 
however, suggests that the form he described as the larva of 
Hal cam pel la chry san thellum detaches itself and floats 
in the water. Other authors assign this form to the genus 
Peachia. The deep siphonoglypli present has an external 
