1897 THE MICROSCOPE. 53 
and forms the head, which bears one or more rows of 
tentacles. Many of the tubularians (fig. 4) form much 
branched compound colonies, much as a seedling will by 
EXPLANATION OF FIGURES. 
1. Clava leptostyla,—f, tentacles; go. gonophores. 
2. Male gonophores of above. 
3. Female gonophores of above,—o unsegmented eggs; pl. eggs which have developed into 
planule. 
4 Bongainvillea,—h feeding hydranths; #2. medusa buds. 
5. Liberated meduas of above. 
G. Obelia, —h € hydrotheca; go. gonangia; per, perisarc. 
7. Sertularia,—e, egg capsule. 
repeated budding forma dense bush. Some, however, 
form the buds near to the attached end and thus the 
colonies consist of small closely crowded bunches, each 
individual appearing as if separate, 
