ss 



Sehr nahe C. Cy matopleurum Nordst.; Cfr. C. Cymatopl. 

 V. incrassata Borge Chloroph. norska Finm. p. 12, fìg. 9. 



C. Corriense Biss. n. s. p. 32, T. II, f. 6. Species moderate sized; 

 oblong, rounded, a hall" longer than broad ; surface finely granulated ; 

 perpendicular rows of granules, about 11 to 22. Horizontal rows, 

 about ó to 7. The semi-cell somewhat semicircular, with an open, 

 acute constriction, lower angles acute, upper rounded; side view glo- 

 bular, end view very broadly ovai. Dim. 43 « 82 « i5 y.. 



C. Davidsonii n. s. p. 33, T. I, f. 8. Medium sized, hexagonal, 

 sides and ends undulated, the undulations increasing in size upwards, 

 and having the crenate, truncate end produced; constriction straight, 

 narrow, not deep; lower angles acute: sides nearly straight, conver- 

 ging upwards, with about four undulations; upper angles rounded; 

 ends broad, straight, with two undulations; from ali the undulations, 

 rows of minute granules, about three in a row, extend inwards, ra- 

 dially, a very short distance; centre of semi-cell smooth; isthmus 

 broad; starch granules single. Dim. 37-40 «25-2Ò« i5-ió i. 



Steht sehr nahe gewissen Formen von C. speciosum Lund.; 

 cfr. z. B. J r e e t a n g u 1 a r e Borge a Sùsswass. Chloroph. nordl. Russi » 

 p 21, T. II, f. 16. 



C. eUgans n. s. p. 33, T. II, f 5. Medium sized, unequally he- 

 xagonal; sides minutely undulated and converging towards the trun- 

 cate produced and more boldly undulated ends; minute crenulations 

 extend from ali the undulations towards the centre of the frond, 

 which appears to be smooth; constriction narrow, of medium depth; 

 frond from side view of nearly equal thickness. Dim. 43-45 « 28- 

 3o « 1 7 [X . 



e. Etchachanense n s. p. 34, T. I, f. i5. Medium sized; semi-or- 

 bicular; about one-third longer than broad; semi-cells scmi-orbicu- 

 lar; basai angles bluntly acute; sides unequally undulated; ends 

 rather flattened and more obscurely undulated; surface finely gra- 

 nulated : granules in perpendicular rows, about nine in a row ; con- 

 striction deep and narrow. Dim. 38-40* 3o-32 = i2-i3 ;/. 



C. flavum n. s p. 34, T. II, f. 17. Small sized; length and breadth 

 equal; semi-cells reniform, in side view circular; constriction deep 

 and opening widely; frond smooth and yellow in colour; zygosp. 

 orbicular, smooth. Dim. 32 ^^^ 32 * io <j.'\ diam. of zygosp. 40 u. 



Steht C. Jacobsenii Roy, C. ellipsoideum Elfv und C. contractum 

 Kirch. sehr nahe. 



C Carrolensc n, s. p. 34, T. II, f. 4. (C. latereundatu s R. et 



