Geology and Natural History. 325 
with antheridia and forms without them may have originally been 
derived from a single species, but cultures continued for two years 
oath section treats of the systematic position of the 
Poronosporc and Saprolegniew. In the former order is included 
The la 
Pythium he last section, to which, in a certain sense, all the 
others are e merely intenduceeey is a valuable discussion of the rela- 
tio the different orders of fungi to one another, and to some 
m 
extent of oe alge. Apparently, De ana! is not willing to go as 
tio ys 
ed order hen saumecea with the dion nycetes vy the 
: Tremellint A second series is eae: by the Saprolegniee, : hi 
tridew and Ustilaginew. With regard to the sexuality of Fungi, 
DeBary expresses himself in rather a conservative manner ged 
considers that in some cases, as in certain Ascomycetes, sexual re- 
production seems to be out of the question, and he is i inclined to 
regard the spores in several groups to be o seperate origin. 
. G. FARLOW. 
10. Fauna und Flora des Golfes von Neapel; TV | eons 
Corallina ; by Professor Soums-Lavsacu. Leipzig, 1881.—This 
small folio of 64 pages with three lithographic plates is the first 
botanical contribution which has been issued in the form of a sep- 
arate memoir, although several botanical papers have Sune m 
the Mittheilungen of the Zoological Station at Naples, and Reinke 
has ae es two papers on the Cutleriacee and Dietyotacea of 
the Bay of Naples in the Nova Acta. Twenty pages are devoted 
Me an spree of the Corallines in the region of Naples; sense 
Ing five era, and twenty-five ies. The specific account i 
lice ioe a chapter on the conformation of the organs of ake 
tion as a basis of generic distinctions. It is incidentally stated 
that the. so-called heterocysts described by Rosanoff in Melobesia 
minute: eases of sie ea iatl of the Pid ut _of Coraitina 
ie ecies. The present alee does not accept - account given 
“iris of the difference in the c pales »s of Corallina and Jania 
but Unites the two. f deat ra. In regard to the spermatozoids he 
maintains in opposition to Thuret “that they are Bag naked but 
have a distinct wall co — to that of the spermatia of 
fungi. The spores are borne on what Solms calls a fusion-cell, a 
