Crvptogamen im Allgemeinen. — Algae. 
93 
rocladum Besch., Java; 1592. Syrrhopodon tristichus N. ab Esenb., 
Ceylon; 1593. Macromitrium sulcatum Brid., Ceylon; 1594. M. Blumei 
N. ab Esenb., Java; 1595. Mnium javense Fleisch., Java; 1596. Calyp- 
tothecium tumidum Fleisch., Java; 1597. Pterobryum viticinum Mitt., 
ins. samoensis Sawai; 1598. Rhynchostegium vagans Jaeg., Java; 
1599. Sematophyllum brevi-cuspidatum Ja eg., ins. samoens. Upolu; 
1600. Ectropothecium verrucosum Jaeg., Java. 
A d d e n d a: 
473, b. Scapania undulata Dum., Bohemia; 583, b. Hedwigia 
ciliata Hedw., Austria infer.; 595, b. Neckerei crispa Hedw., Austria 
infer.; 1095, b. Homalothecium Philippeanum Br. Eur., Litorale 
austriac.; 1270, b. Didymodon giganteus Jur., Hungaria. 
Die Schedae enthalten in der hergebrachten Weise die Litera- 
turcitate, die Synonymie, ferner Beschreibungen und kritische Be¬ 
merkungen bei einzelnen Arten. Zahlbruckner (Wien). 
Hoyt, W. D., Periodic ity in the fruiting of a marine alga. 
(The Plant World. XI. p. 102-106. 1 hg. xMay, 1908.) 
A populär account of periodicit}^ of fruiting in Dictyota dicho- 
toma , as observed at Beaufort, North Carolina, and as described 
in detail in the Botanical Gazette for June, 1907. (Volume XLIII, 
p. 383—392). Maxon. 
Mann, A., Report on the Diatoms of the Albatross Voya- 
ges in the Pacific Ocean, 1888—1904. (Contributions from the 
U. S. National Herbarium. Vol. X. Part. 5. p. 221—442. plates 44—54. 
July 11, 1907.) 
The present paper deals with the Diatomaceae found in sea 
dredgings and soundings of the United States Bureau of Fisheries 
Steamer “Albatross 54 , taken during the course of fishery and deep 
sea investigations on the Western coast of the United States, off 
British Columbia and Alaska, and in more distant regions in 
the Pacific Ocean, from 1888 to 1904, inclusive. 
The main part of the report comprises an “annotated catalogue 
of genera and species.” Preceding this there is an introductory 
chapter detailing the methods of preparing material for investigation 
and study, and giving some account of the occurrence of diatoms in 
nature and of the peculiar qualifications they possess (e. g. their 
expreme minuteness and nearly indestructible composition), from 
which they have an unique value in determining important questions 
as to the extent and direction of ocean currents and the source of 
the material comprising sea bottoms. Some examples are given to 
show the importance of this last feature, and the prosecution of 
more extensive and more thorough collection is urged. 
The nomenclatorial difficulties inherent in botli past and present 
studies of the diatoms is touched upon brielty. In the present paper 
the generic and specific names assigned are given according to the 
rules now generally prevailing in botanical nomenclature; except 
that, pending a thorough and complete revision as to the proper 
application of all generic names with due regard to the original 
species included, the author has found it desirable to follow more 
or less closely the traditional application of generic names in a 
majority of cases. Certain necessary changes have been made when 
unavoidable on account of homonyms or of older valid names. The 
