The Mastigophora H9 



(pantonematic pattern) have been reported on the flagellum, or on one of 

 two flagella (200). 



In the simpler species a thin periplast permits moderate amoeboid 

 activity. Cortical specialization has followed several trends: (1) the de- 

 position of a secreted layer just outside the periplast; (2) development 

 of a lorica (Fig. 4. 2, A, F) or a test (Fig. 4. 2, C, D); (3) development of 



Fig. 4. 1. A. Ochromoyias granularis Doflein, showing nucleus and 

 stored lipids; chromatophore omitted; x2100 (after D.). B. Chromulina 

 annulata Conrad; ribbon-like chromatophore, mass of leucosin; x3000 

 (after C). C. Ochromonas reptans Conrad; two chromatophores, leucosin 

 granules; x2250 (after C). D. O. granularis, typical chromatophore, mod- 

 erate leucosin; x2025 (after Doflein). E. O. granularis, chromatophore dis- 

 placed by large mass of leucosin; xl875 (after Doflein). F. Chromulina 

 commutata Pascher, narrow chromatophore, leucosin granules; xl400 

 (after P.). G. Unusually large chromatophore in Ochromonas sp.; schematic 

 (after Pascher). H, I. Chrysapsis fenestrata Pascher, posterior and lateral 

 views of net-like chromatophore; x2100 (after P.). J. Ochromonas pinguis, 

 large chromatophore, peripheral zone of lipoid globules; x2500 (after 

 Conrad). 



