370 CU MINGS AND GALLOWAY MORPHOLOGY OF TREPOSTOMATA 



Plate 11. — Morphology of the Trepostomata. 



Figure 11. — Longitudinal section of a zocccium of Heterotnjpa subrawosa 

 JJlrich. 



In this example tlio oyst is stoppered by a very thick diaphragm. 

 X 65. (123-19.) 



Figure 12. — Longitudinal section of Monticulipora epidermata V. (ind B. 



As in most of the Monticuliporida?, sensu strictu, the brown 

 mass is not enveloped by ;i fully formed cyst, but is more or less 

 isolated by the cystiphra.^ms and the proximal diaphragm. X 65. 

 (50-23.) 



Figure 13. — Longitudinal section of xitactopora intermedia C. and G. 



The brown material is present in all three zocecia, and there is 

 a well defined cyst in the one to the right. X 65. (157-23.) 



Figure 14. — Longitudinal section of several zooecia of Amplexopora pustulosa. 



The well defined cyst and brown mass have the same form as in 

 Heterotrypa. X 65. (125-1.) 



Figure 15. — Longitudinal section of Honiotnjpa cf. subramosa. 



The arrangement of brown material and cystiphragms is the 

 same as in Monticulipora. X 65. (186-9.) 



Figure 1(].— Longitudinal section of Homotrypella rotundipora n. sp. 



A well defined neck is formed by the cystiphragm on the right- 

 hand wall. X 65. (148-13.) 



Figure IT. — Longitudinal section of Homotrypa spissa n. sp. 



This section shows a well defined brown mass and an unusual 

 thickening of the cystiphragms icy), which are intimately related 

 to the cingulum. X 65. (202-18.) 



Figure 18. — Longitudinal section of Feronopora vera. 



A very sharply defined brown mass and inclosing cystiphragms. 

 X 65. (112-12.) 



Figure 19. — Longitudinal section of Prasoporu siniulatrix. 



Here the polypide chamber, in which is lodged the brown mass, 

 is very greatly restricted in size, and the nock of the cyst is small 

 and well defined. The distal and proximal diaphragms are also 

 clearly defined. X 65. H1 1-10.) 



FiGUKE 20. — Longitudinal section of Feronopora vera. 



Two very typical brown masses with their accompanying cysti- 

 phragms are shown (h and 1)'). X 65. (112-12.) 



