ADDENDA ET CORRIGENDA.
Page 5,
7,
11
21,
23,
24,
25,
27,
29,
33,
35,
40,
51,
line \ \ , f o r studied, read stated.
lin e 9 ,/ o r th e genus Diadesmis su b s titu te th e genus A chnanthidium.
ad d to tb e instances o f Conjugation in Epithemia., E . Zebra', noticed by Mr. Thwaites
in Ann. Na t. H ist., Nov. 1847.
to tb e desc ription o f Cocconeis P lacentula, ad d . Striae 45 in 'O O l" ; an d to h ab ita t,
In Conjugation, Lewes, Feb. 1853.
lin e 5, fo r Orthosira sulcata, Kiitz., re ad Melosira sulcata, Kiitz.
to tb e loca lity of E upodiscm crassus, add, S toma ch of scallop, Feb. 1853.
to th e h a b ita t o f Eupodiscus sculptus, add. Isle o f Dogs, M r. Roper.
Tric era tium s trio la tum ? E h r. Specimens from M r. B rig h twell have satisfied me
th a t this is n o t T. strio la tum of E h re n b e rg ; I th ere fo re propose for it th e name
o f T. undulatum.
to th e localities o f Campylodiscus spiralis, add, Newhaven, Sussex, Dec. 1852,
W. Sm.
Surirella p a n d u r ifo rm is is probably a var. o f S. p in n a ta .
for n . sp. annexed to TrybUonella Scutellum, re ad W. Sm.
add to th e h a b ita t o f N itz sch ia angularis, P oole Bay, Sept. 1849, W. Sm.
last line b u t one, in sert a full stop a fte r 42, an d re ad in con tin u atio n , Var. /3. Elir.
Inf. xiii. 7, et seq.