266 BULLETIN OF THE BUREAU OF FISHERIES. 



PLATE XXIX. 



Fig. 81. Amathia dichotoma, portion of a branch, showing arrangement of zooecia and mode of branching. 



8ia. The same, a single cluster of zooecia more highly magnified. 

 Fig. 82. Vesicularia familial is, a single zooecium, after Smitt. 

 Fig. 84. Hippiiraria armata, portion of an erect branch. 



84a. The same, a single zooecium in the contracted state much enlarged. 



84b. The same, details of alimentary system, (L) lophophore, (O) cesophagus, (G) gizzard, (S) 



stomach, (I) intestine. 

 Fig. 85. Hippuraria elongata, n. sp., portion of stolon with one zooecium. 



. The same, small portion of stolon more highly magnified to show manner of branching and 



origin of zooecia. 



. The same, outline of the long-pedicellate form of zooecium. 

 85C. The same, details of anatomy. 



PLATE XXX. 



Fig. 86. Alcmbranipora arctica on shell, twice natural size. 



Fig. 87. Membranipora tenuis, at the right, and M. monostachys, at the left, on pebble, twice natural 



size. 



Fig. 88. Smittia trispinosa var. nitida, nodular masses about natural size, encrusting shells. 

 Fig. 89. Lcpralia pallasiana, colony growing on submerged wood, twice natural size. 

 Fig. 90. Microporclla ciliata var. stellata, on shell, twice natural size. 

 Fig. 91. Schizoporella unicornis, on mass of tubes of Hydroides dianthus, one-half natural size. 



PLATE XXXI. 



Fig. 92. Alcyonidium -verrilli, colony with flattened branches, one-half natural size. 



923. The same, with rounded branches, one-half natural size. 

 Fig. 93. Caberea ellisii, natural size. 

 Fig. 94. Bugula flabellata, natural size. 

 Fig. 95. Scrupocellaria scabra, natural size. 

 Fig. 96. Menipea ternata, natural size. 

 Fig. 97. Gemellana loricata, reduced about one-half. 

 Fig. 98. Cellepora canaliculata, natural size. 



Fig. 99. Cellepora americana, colonies growing on hydroid stem, natural size. 

 Fig. 100. Rhamphostomella costata, colony growing on Boltenia stem, natural size. 

 Fig. 101. Porella proboscidea, at the left a colony on a stem of Boltenia, at the right the more usual form 



of the colony on a hydroid stem, both reduced about one-half. 

 Fig. 102. Bugula turrita, slightly reduced. 



