50 TUFTS COLLEGE STUDIES, VOL. IV, No. 7 



Page 80 of supplement, after description of KIRCHXKKIKLLA 

 OBHSA, add, 



Var. APERTA (Teiling) Brunnthaler in Pascher, 1915, p. 182 ; 

 K. aperta Teiling, 1912, p. 276, fig. 9. Differs from the type 

 by the acute-angled incision, being in this respect intermediate 

 between K. /unaris and K. obesa ; dimensions the same as in 

 K. obesa ; apices blunt. Wis., G. M. Smith. Europe. 



Page 172, for Key to the Species of Coelastrum, substitute, 



i. Cells united by arm-like processes from the membrane. 



5. C. reticulatum. 

 I. Cells in contact or united by quite short processes. 2. 



2. Cells without external projections. 3. 



2. Cells with external projections. 4. 



3. Cells spherical or slightly elongate, interspaces small. 



i. C. microporunt. 

 3. Cells ovoid, mutually compressed, interspaces >-i cell diani. 



2. C. sphaericum. 



4. Bach cell normally with one projection. 5. 



4. Bach cell normally with several projections. 6. 



5. External view of cell hexagonal. 3. C. proboscidfum. 



5. External view of cell io-12-angled. 4. C. cambricum. 



6. Ech cell with 3 polar projections. 48. C. cubicum. 



6. Bach cell with several irregularly placed projections. 



6. C. verrucosum. 



Page 173, after description of C. CAMBRICUM, add, 



Var. INTERMEDIUM (Bohlin) G. S. West, 1907, p. 136 ; C. pul- 



chrum var. intermedium Bohlin, 1897, p. 35, PI. II, figs. 16-17. 



Projections broader and less acute than in the typical form. 



Fla., Borge. 



Page 173, after description of C. RETicuLATUM.'add, 

 C. SCABRUM Reinsch, 1877, p. 232 ; Printz, 1913, p. 90, PI. 

 VII, fig. 192 ; Brunnthaler in Pascher, 1915, p. 197, fig. 316. 

 Colonies spherical or subcubical, of 8-16 cells; cells spherical, 

 8-io/idiam., each with 3-6 firm, regularly arranged truncate 

 prolongations, punctulate at the apex. Mackinaw, Mich., 

 Transeau. South Africa. 



PHYTOMORULA Kofoid, 1914, p. 38. 



Colony of 16 cells, 4 cells in the same plane being superim- 

 posed on 4 other similar cells, also in one plane, the group of 8 

 being surrounded by a ring of 8 cells. Chromatophore parietal, 

 with numerous minute pyrenoids and central nucleus. Repro- 

 duction unknown. 



