80 
Baddeley, on Diatomacece. 
A portion of this can be examined in this state; another 
portion^ after being well washed in fresh water ; and the re- 
mainder treated with acid as nsual. 
The result of the examination of the first will probably 
show many species of Diatomacese in their natural state, 
often alive, and with the Endochrome perfect. It is by this 
method that I have found several rarer species in their nor- 
mal condition. 
The best winds in which to capture these creatures appear 
to be those from south to west — during their prevalence I 
have taken Noctilucae every month of the year on the east 
coast of England ; but it is during the summer months that 
they are most abundant, and during calm weather. 
Abroad, they are constantly to be met with in warm lati- 
tudes ; and I feel confident some interesting results might be 
obtained by securing this creature in various parts of the 
world. 
I now beg to mention some of the species I have found by 
the above-mentioned means : 
Coscinodiscus radiatus. 
„ concinnus. 
„ eccentricus. 
Eupodiscus argus. 
„ subtilis. 
„ crassus. 
„ radiatus. 
„ tesselatus.* 
Actinocyclus undulatus. 
Triceratium favus. 
„ undulatum 
(and varieties). 
„ alternaiis. 
„ malleus. 
„ striolatum. 
„ newspecies, not named. 
Campylodiscus costatus. 
„ cribrosus. 
Surirella fastuosa. 
„ gemma. 
Amphiprora didjma 
(and another species, not certain). 
Navicula palpebralis. 
„ elegans 
(and some others). 
Pinnularia distans. 
The above-mentioned species, however, will give some idea 
of the nature of the gatherings to be expected. 
* I am endeavouring to ascertain to what species the several discoid 
forms attached to each other by stipes belong, and which are found in these 
gatheriugs. 
Stauroneis pulchella. 
Doryphora amphiceros. 
Tryblionella punctata. 
Striatella unipunctata. 
Pleurosigma elongatum. 
rigidum. 
„ formosum. 
fasciola. 
„ balticum 
(and several others). 
Two or three Asterionelh. 
Rhizosolenia styliformis. 
„ setigera. 
Biddulphia rhombus, 
aurita. 
„ Baileyii. 
Ampliititras antediluviana. 
Bacillaria paradoxa. 
Eucainpia zodiacus. 
Grammatophora serpentina. 
Several species of Melosira. 
„ Podosira. 
Oithosira. 
Chsetoceras (?), 
(also several others, of whose true 
name I am uncertain). 
