BRYOZOA OF THE PHILIPPINE REGION 



461 



Fig. 193. — Genus Onchopora Busk, 1855 



A, B. Onchopora grimaldi Jullien, 1903. A. Anterior face showing the form of 

 the ascopore and the membraneous fenestrules; X20. B. Posterior or dorsal 

 face. (A, B. After Jullien, 1903.) 



C-M. Onchopora stnclairi Busk, 1857. C. In two of the zooecia the oper- 

 culum is open and the inwardly directed, angularly bent lateral parts of the vesti- 

 bulum are seen; X40. D. A zooecium with ovicell of the same species; X40, 

 E. Sagittal section through an unfinished ovicell. The cryptocyst which rises 

 from the distal wall, is incorrectly drawn as connected with the membraneous 

 endooecium. F. A sagittal section through an ovicell. Here also the cryptocyst 

 is drawn as connected with the endooecium; X40. G. An ovicell, lateral view; 

 X40. II. An undeveloped ovicell from the frontal surface; X40. I. An ovicell 

 from the basal surface; X40. J. A transverse section through a branch. Two 

 distal walls with septulae and two compensal rices are seen; X40. K. Diagram- 

 matic section showing the structure of the ovicell. (C-K, After Lovinsen, 1909.) 

 L. Seen somewhat obliquely. The compensatrix (c. s.) opens by the crescentic 

 median pore (m. p.), fl., vertical flange of operculum; /., membraneous fenestra 

 m. p. median pore; s., suture in calcareous wall. (After Harmer, 1909.) M. 

 Section showing the membrane dividing the zooecia, X25. It is the wall of the 

 compensatrix. (After Waters.) 



