LIST OF ILLUSTRATIONS. 



Page. 

 Fig. 1. Spiroplecta bulbosa. a, view from exterior, showing large propor- 

 tion of the circular part of the test. X 120. b, optical section 

 of the test, showing the complete volution made by the coiled 

 chambers about the proloculum. X 200 5 



2-5. Textularia sagittula, var. atrata. 2, front view. X 60. 3, end 

 view of another specimen. X 60. 4, view of microspheric 

 proloculum and succeeding chambers by transmitted light, the 

 early chambers forming a coiled series about the proloculum, the 

 later chambers assuming the biserial condition. X 75. 5, view 

 of megalospheric proloculum and succeeding chambers by trans- 

 mitted light, the early chambers following the proloculum 

 immediately assuming the biserial condition. X 75 7 



6-8. Textularia gramen. 6, a, side view; b, end view. X 60. 7, 

 microspheric proloculum and succeeding chambers viewed by 

 transmitted light, the early chambers forming a coiled group half 

 way around the proloculum. X 150. 8. megalospheric prolocu- 

 lum and succeeding chambers, the chambers following the pro- 

 loculum assuming the biserial form at once without trace of 



coiling. Specimen viewed by transmitted light. X 75_ 8 



9. Textularia gramen. a, side view, showing the peculiarly modified 



chambers in the later growth; b, end view. X 60 9 



10. Textularia agglutinans. X 40. a. front view; b. end view 9 



11. Textularia agglutinans, var. fistula. X 40 10 



12. Textularia horrida. X 60. a, front view; 6, end view 11 



13. Textularia stricta. X 15. a, front view; b, end view 11 



14-17. Textularia candeiana. 14, specimen from Hawaiian Islands. X 60. 



a, apertural view; b, front view. 15, specimen from Gaspar 

 Strait. X 60. a, apertural view; 6, front view. 16, micro- 

 spheric proloculum and early coiled chambers. X 115. 17. 

 megalospheric proloculum and following chambers of megalo- 

 spheric form. X 115 12 



18-19. Textularia milletti. 18, a, end view; 6, front view. X 50. 19, 



optical section by transmitted light. X 40 13 



20. Textularia abbreviata. X 60. a, apertural view; b, front view. J 4 



21-23. Textularia aspera. 21, specimens growing attached to a fragment 

 of Rhabdammina. X 20. 22, front view of specimen detached. 

 X 25. 23, end view of another specimen. X 25 (after Brady ) . . 14 



24. Textularia goesii. X 35. a, front view; b, apertural view (after 



Brady) 15 



25. Textularia rhomboidalis. X 75. a, apertural view; b, front view.. 16 

 26-27. Textularia carinata. X 30. 26, front view. 27, a, front view of 



another specimen ; b, end view (after Brady) 17 



28-29. Textularia siphonifera. 28, a, front view of specimen with three 

 projections on each of the adult chambers; b, side view; c, end 

 view. X 40. 29, proloculum and early chambers by trans- 

 mitted light. X 300 18 



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