XIX 142 



Chaetoceras angulatum Schutt 



— armatum West . 



— atlanticum Cleve 



— atlanticum f. audax (Schutt) 



— atlanticum v. exigua Cleve 



— atlanticum v. tumescens Grün 



— audax Schutt 



— balticum Cleve 



— biconcavum Gran 



— boreale Bail. 



— boreale Schutt 



— boreale v. Brightwellii Cleve 

 v. densa Cleve 



— boreale v. rudis Cleve 



— boreale f. solitaria Cleve 

 f. varians Gran. 



— bottnicum Cleve 



— breve Schutt 



— Brightwellii Gran 



— cellulosum Lauder 



— cinctum Gran 



— clavigerum Grün. 



— Clevei Schutt 



— coarctatum Lauder 



— Cochlea Schutt 



— commutatum Cleve 



— compactum Schutt 



— compressum Cleve 



— compressum Schutt 



— concretum Engl. 



— constrictum Gran 



— contortum Schutt 



— convolutum Castr. 



— coronatum Gran 



— crinitum Gran 



— crinitum Schutt 



— criophilum Castr. 



— criophilum Cleve 



— criophilum f. volans (Schutt) 



— currens Cleve 



— curvisetum Cleve 



— curvisetum Cleve (p. p.) 



— danicum Cleve 



— debile Cleve 



— decipiens Cleve 

 v. concreto Grün. 



— densum Cleve 



— diadema (Ehr.) 



— dichaeta Ehr. 



— didymum Ehr. 



— didymum v. anglica (Grün.) 



— didymum v. hiemalis Cleve 



— didymum v. longicruris Cleve 



— difficile Cleve 



— dispar Castr. 



