BULL. GEOL. SOC. AM. 



VOL. 8, 1896, PL. 39 



Figurk 43.— Photomicrograph of Section 

 of Daemonelix regular 



Showing two tubes ; upper one cut tangen- 

 tially, the other obliquely. 







* - 



44 V 





^1L^*«* 







%•$.. 



*-# J 







* 



. ;«; *•*- <♦*■ *d»^ 



» 



/ 



f » ** 



Si 





i-*, ■ 







<^t 



^ 











Figure 44.— Portion of Figure 43 

 Greatly magnified. 



Figure 45.— Portion of Figure 43 

 More highly magnified. 



Figure 46.— Cross-sections of Wall of 

 great Tubes of Daemonelix 



'. - mm ',. . ~r - . "^*^2* 







-.--■MM 



SW3 





: AJl£j£* 1 *i tJ ^fZ~- 7^ ■■■> 





Figure 47.— Cross-section of Wall of 

 great Tubule of Daemonelix 



Figure 48. -Tangential Section of great 

 Tube of Daemonelix 



From retouched photomicrograph. From photomicrograph of same scale as figure 47. 



SECTIONS OF DAEMONELIX 



