266 BULLETIN OF THE BUREAU OF FISHERIES. 



PLATE XXIX. 



Fig. 8i. Awo/Zita (ijcAo/oma, portion of abranch, showing arrangement of zooecia and mode of branching. 



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

 Fig. 82. Vesiculariafamiliaris, a single zooecium, after Smitt. 

 Fig. 84. Hippuraria armaia, 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) oesophagus, (G) gizzard, (S) 

 stomach, (I) intestine. 

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



85a. The same, small portion of stolon more highly magnified to show manner of branching and 

 origin of zooecia. 



8sb. The same, outline of the long-pedicellate form of zooecium. 



85c. The same, details of anatomy. 



PLATE XXX. 



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



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



size. 

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

 Fig. 89. Lepralia 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. 



92a. The same, with roimded branches, one-half natural size. 

 Fig. 93. Caberca ellisii, natural size. 

 Fig. 94. Bugula flabeUata, natural size. 

 Fig. 95. Scrupoccllaria scabra, natural size. 

 Fig. 96. Menipca tcrnaia, natural size. 

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

 Fig. 98. Cellepora canaliculaia, natural size. 



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

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

 Fig. loi. Porella proboscidca, at the left a colony on a stem of Boltcnia, 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. 



