PLATE X. 



Fig. 90. — Aglaophenia pluma. Hydrothecae. x 45. 



Fig. 91. — Same species. Corbula. x 14. 



Fig. 92. — Antenella avalonia. Stem, x 45. 



Fig. 93.— Same species. Showing a pair of gonophores arising from the 

 base of a hydrotheea. x 45. 



Fig. 94. — Same species. Gonotheca, one with two basal nematophores. 



Fig. 95. — Halicornaria producta. Hydrothecae. x f>0. 



Fig. 96. — Plumularia alicia. Portion of hydrocladium. x 40. 



Fig. 97. — Same species. Portion of stem, with gonophores. x 30. 



Fig. 98. — Plumularia goodei. x 45. 



