75 



phepcmenop ir the devplorrental stares nf various for'-s, 



ATTACH' -EFT . 



Ur^der favorable ror^ditiors vrhen the larva is about 

 fifty hours ''Id it rracher that starre of develor'-ert nt 

 v;hich attaohrert tnkec •nlace. In -".re^^aration for this pro- 

 cess the rilanula settles to the botto", loses its oilia 

 and consecue'^tly its rovere'':ts cease. The "-anper of attach- 

 inent in Turrjtorsis lil'e that of Stp-iotoca differs frcr 

 that usually described in hydroid develcr-nent. Instead of 

 settlinr de:7n o'- the rnterior end of the '^lanula accord 

 to the rethod which occurs in Eude^driur , and which has 

 bee'- repardec as tyical and used in descriT'tions of the 

 e-bryolcpy of the Hydrcedusae in text-bcclTS , the rlanula 

 becomes attached on its side by nearly its wh'^le lenfth^ 

 and is transformed into a root. The hydranth instead of 

 rrowinp u-^ fro- th'^ -^osterior e-d of the nlanula as in 

 fcrTS V'hich attach th^rselves by the anterior end, de- 



li nr 



