(61) 



Ikeda ( 9) ,. however, has iuvosligateci the internal changes 

 „hich take place auring me tairio r^hos is ana has aaaea a Valuable 

 contribution to the subject. 



The behaviour durin^: metajrio rphos is of Actinot rochae Spe- 

 ciea, A. and Species, E. , from Beaufort Harbor aeeiud t^ be quitr 

 the same as that of ti.c t ■.-,-: Ac t i no t roc l:ae ■.■,'hich Wilson has ob- 

 servea, and tner-e is little rioubt in my mind but that they are 

 of the sam*^ species. 



As Wilson has stated, the metarricrphosis of Actinotrocha 

 Species, A. ("T^ig.S4) taxes place mucii m^ "^ ^uicAx" ti.jji tht^*: 

 V f Sp'^c"' <=b, E. ("'*'ifi.S5) In fact, 1 have never obtained a 

 completely metamorphosed specimen o -^ the latter, althou,::h many 

 ti-Ties 1 have found specimens o -^ this species v/ith the ventral 

 pouch well eva:jinated. (Fi^_^.5o) I have tried to make the con- 

 aitions favorable for the completion of the metamorphosis by 

 coverin,; t(:f^ bottom of the aquarium with a layer of sand rich in 

 diatoms ana also by chant^in-^ th.e v/ater frequently. Unaer these 

 ccnaitions, ti.e larvae (Species, E, ) would invariably sink to 

 the bottom and move around on the sand apparently j.n search of 

 a favorable place to finisii the metamorphosis. Th" ^.atter neve^ 

 occurred, however, althourh sometimes the larvae woula attach 

 the ena of the ventral poijch to the bottom of tiie clish. In 

 this v/cLV the cr<^ature woula often remain for days and although 



