208 Chaktophoraceae 



The form described and illustrated under this name by Wolle 

 is quite incompatible with the species of Ki'itzing. He seems not 

 to have noticed the essential phrase in the description of Raben- 

 horst, " ramulis superioribus plerumque ternis fasciculatim 

 aggregatis." Certainly there is no fasciculate branching in 

 Wolle's form : it appears to be more like our Myxonema vcntri- 

 costnn. 



Stigeoclonium protensum (Dillw.) Kutz. Phyc. Germ. 198. 

 1845 5 Spec. Alg. 355. 1849; Tab. Phyc. 3 : pi. 18. f 2. 1853. 

 Wolle, F. W. Alg. 112. pi. 1 01. f 1-4. 1887. 



Conferva protensa Dillwyn, Brit. Conferv. pi. 6j. 1806. 



Possibly Wolle's figures represent this species, but as no speci- 

 mens that could be identified with it have been seen, this form 

 must be considered questionable. 



Stigeoclonium fasciculare Kutz. Bot. Zeit. 5: 177. 1847; 

 Tab. Phyc. 3: pi. 8. f. 1. 1853. Rabenh. Flor. Eur. 

 Alg. 3: 380. 1868. Wolle, F. W. Alg. 114. pi. pp. f. 1. 

 1887. 



The form illustrated by Wolle is very different from Kiitzing's 

 species. The phrase in Rabenhorst's description "filis ramisque 

 dichotomis," has been made by Wolle to read ''branching mostly 

 opposite dichotomous ," thus changing entirely the character of the 

 description, to say nothing of bringing together two incompatible 

 features. 



Stigeoclonium fasciculare Phyc. Bor. Am. 6j is similar to 

 Wolle's form in its opposite branching and appears to be nearly 

 related to Myxonema lubricum. 



In the specimen issued under this name by Miss Tilden (Am. 

 Alg. 20) we can find nothing but CJiactophora elcgans. 



We have seen no American specimens that could properly be 

 considered Stigeoclonium fasciculare, though our Myxonema glom- 

 eratum approaches it in general character. 



Stigeoclonium fastigatum Kutz. Spec. Alg. 356. 1849 ; Tab. 

 Phyc. 3 : pi. 11. f 1. 1853. Wolle, F. W. Alg. 1 14. pi. loo.f 1. 

 1887. Saunders, Flora of Neb. 1 : 64.pl. 18. f 2. 1894. 



Stigeoclonium radians Kiitz. Spec. Alg. 354. 1849; Tab. 

 Phys. 3: pi. y.f. 2. 1853. Wolle, F. W. Alg, 115.//. 102. f 4. 

 1887. 



