Alo^ae. — Eumvcetes. 297 



■^ö 



bution of Pacific and Indian Ocean Laniinariaceae , the center of 

 distribution is probably austral and the northward extension along 

 the western coast of the Americas to Japan a later development. 

 In fact, the Gloiophloea and Pseudoscinaia species, in their distri- 

 bution, call strongly to mind the distribution of the Lessonioid and 

 Ecklonioid Laininariaceae in their relation to members of the other 

 tribes of kelps. That this is also true of certain other families and 

 genera of marine algae is also apparent and will give an added 

 interest to the study of Antarctic and Australia-indico-pacific forms 

 as compared with those of the North Atlantic and Arctic 

 Oceans. The occurrence of a Gloiophloea in the North Atlantic 

 (Florida coast) seems, from this point of view, anomalous. It is to 

 be suspected however, that an increase in our knowledge may 

 show other similar cases". M. J. Sirks (Haarlem). 



Skottsberg, C, Notes on pacific coast algae. I. Pylaiella 

 Postelsiae n. sp., a new type in thegenus Pylaiella. (Univ. 

 Calif Publ. Bot. VI. 6. p. 153-164. pls. 17—19. 1915.) 



The alga, occurring on the Californian coast and determined 

 by Saun d er s as Leptonema fascictdaturn Reinke, was studied b\^ 

 the writer, who found that it was not at all a Leploriema-species , 

 but a Pylaiella, belonging to the Ectocarpaceae. So far as the author 

 is able to judge, there are no serious obstacles against bringing 

 the plant to Pylaiella as a new species, though is deserves to be 

 placed in a separate subgenus, for which the author has chosen 

 the name Panthocarpus nov. subgen. The new species is named 

 Pylaiella Postelsiae Skottsb. nov. spec. 



It represents a rather primitive type among the Ectocarpaceae. 

 The special development of the basal parts excepted, there is hardly 

 anj'- differentiation in the thallus. The short branches serve exactly 

 the same purpose as the long ones. It does not require much ima- 

 gination to derive the Bachelotiat-ype from Panthocarpus and the 

 same may perhaps be said of the other Pylaiellae. It is doubtful 

 whether we should regard the continuous chains or the intercalary 

 ranges of sporangia as the more primitive type. To the writer the 

 latter seems to represent a slightly more advanced stage, a step 

 towards the origin of special reproductive organs. In Pylaiella varia 

 we can almost speak of such; in Ectocarpus they have assuraed a 

 more distinct shape. If, in P. Postelsiae, the long threads should 

 remain sterile and the short branches alone become fertile, we 

 would come near the type of P. varia, and if the branches were 

 of a more uniform length we should get an Ettectocarpus. The 

 author does not pretend to unravel with these ideas the phylogeny 

 of these forms. M. J. Sirks (Haarlem). 



Buller, A. H. R., Die Erzeugung und Befreiung der 



Sporen bei Coprinus sterquilinus. (Jahrb. f. wiss. Bot. LVT. 



p. 299-329. 2 T. 2 Abb. 1915.) 



In der Gattung Coprinus gibt es zwei hinsichtlich des Baues 



der Lamellen verschiedene T5'^pen, den einen mit Z3'Stiden an den 



Seitenflächen der Lamellen, den anderen ohne solche. Die Aufgabe 



der Zystiden besteht darin, die gegenüberliegenden Hymeniumflächen 



benachbarter Lamellen während der Entwickelung der Sporen 



auseinander zu halten. Dies wird bei den Arten des zweiten Typus, 



zu welchem Coprinus comatus und C. sterquilinus gehören, dadurch 



erreicht, dass die Ränder der Lamellen wulstig verdickt sind. 



