PLATE LXi. 



t^igiires magnified 500 diameters. 



Page, 

 cosmarium constbictom, . • .63 



CosJtARiUM SDPRASPECiosuM, front and side views, 95 



Cof^MARiUM scENEDESiirs, in three views, . 63 



10, 11, 12. CosMARiDM DEPRESSDM, in three views, 69 



COSMARIUM GRANATUM, . . 64 



COSMARIUM BeCKEI,* . . — 



CosMARruM SBUUNCTUM, front, end and side views, . tiS 



CosMABiuM Nageliantjm, . 73 



COSMAEIUJI PSEUDOTAXICHONDRTTM, . 77 



CoSMARItIM CONTRACTUM, • 68 



STAURA.STROM Pringlei, in three views, 145 



Clostericm Lunula, . 42 



" 27. CAIADCYLINDRt'S Clevbi, 60-38 



" 28. Calocylindrus THWAiTE-sn, . 60 



Figs. 29, 30, 31. Docidium minutum. . 57 



Fis;. 32. Docidium dilatatum, . 55 



" 33, 34. Tetmemorus granulatus, . . 98 



'• 35. Tetmemorus laevis, . 98 



" 36. Tetmemorus Brebissonii, . . . 95 



Figs. 37-.39. Staurastrcm (Polyedrium) enorme, . 166 



* C. Beckei, Willie. (Omitted in proper place.) Cells slightly longer than broad; 

 semi-cells nearly semicircular, apices truncate five erenate; sides incised crenate; 

 two series of granules of about 1.5 and 9 near the margins; center inflated and 

 sparsely granular; variable in size; larger form about 'JS Mie. M. long; 25 Mic. M. 

 wide. 



Not quite, but nearly in accord with Willie's diagnosis. 



