264 BULLETIN OP THE BUREAU OF FISHERIES. 



Fig. 49. Schizoporella biaperta, portion of colony. 



493. The same, details of cell and ovicell, more enlarged. 



490. The same, the large pointed avicularium occasionally present. 

 Fig. 50. Schizoporella auriculata, portion of colony. 



5oa. The same, details of fully calcified cell and ovicell, more enlarged. 

 Fig. 51. Schizoporella sinuosa, portion of colony near growing edge, showing change in shape of aperture. 



513. The same, details of cell and ovicell in complete calcification. 

 Fig. 52. Ccllcpora americana, n. sp., aperture and ovicell in front view. 



523. The same, side view showing avicularium. 



520. The same, primary orifice. 

 Fig. 53. Cellepora canaliculata, cell and ovicell in front view. 



533. The same, two views of the rostrum. 



530. The same, primary aperture. 



Fig. 54. Lepralia pallasiana, portion of colony with details of one zooecium. 

 Fig. 55. Lepralia americana, portion of colony with details of infertile cell, more enlarged than figure 54. 



553. The same, details of a fertile cell and ovicell. 



PLATE XXVI. 



Fig. 56. Lepralia pertusa, portion of colony with cells and ovicell of the usual form. 



56a. The same, two cells from the same colony, smaller variety. 



560. The same, heavily calcified ovicell, ttmbonate process behind orifice, and lateral avicularia. 



56c. The same, cells near the edge of the same colony as s6b and at the same magnification, showing 



variation in size of cells. 



Fig. 57. Lepralia serrata, n. sp., young cell with oral spines and primary aperture before beginning of sec- 

 ondary calcification. 



573. The same, cell with avicularia, from central part of the same colony as 57, secondary calcifica- 

 tion very deep, a large avicularium on a mamillate process. 



57b. The same, portion of a colony with ovicells and various avicularia. 



57C. The same, details of aperture and ovicell, more highly magnified. 

 Fig. 58. Mucronella peachii, portion of colony showing ovicell and details of secondary calcification. 



58a. The same, young cell at edge of colony showing primary aperture, oral spines, and marginal 



areolae. 

 Fig. 59. Mucronella ventricosa, fully calcified, with ovicells, same magnification as figure 58. 



593. The same, aperture of young cell with oral spines and developing peristome, more highly 



enlarged. 



Fig. 60. Mucronella pavonella, portion of colony showing details. 

 Fig. 61. Rhamphostomclla bilaminata, infertile cells. 



6ia. The same, fertile cell with ooecium. 

 Fig. 62. Rhamphostomella costata, infertile cells. 



623. The same, side view of rostrum showing avicularium. 



62b. The same, fertile cells with ovicells and large pointed avicularium. 

 Fig. 63. Rhamphostomella ovata, infertile cells. 



633. The same, fertile cell with ovicell. 

 Fig. 64. Smittia porifera, portion of colony. 



PLATE XXVII. 



Fig. 65. Smittia trispinosa, two cellsof typical form, with oral spines and avicularia. 



653. The same, showing connecting links with the var. nitida in the variously shaped avicularia, 

 msgnified somewhst more than figure 65. 



