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M. rotata Grev. E.
M. papillifera Breb. E.
Euastnim verrucosum Ehr. E.
E. oblonfjum Grev. E.
E. ansatum Ehr. E.
E. pectinatum Breb. E.
E. binale Turp. B.
E. insulare Wittr. P.
E. ehfjans Breb. B.
E. denticulatum Gay. E.
Cosmarmm anceps Lund. E.
C. /rti'^' Rabenb. Tile-burn Pond.
C. Cucumis Corda. B.
C. paclujdermum Lund. M.
C fjaleritum Nord. E.
G. connatum Ralfs. E.
FRESH-WATER ALG.E OF HAMPSHIRE. 387
G. pygmmim Archer. E.
G. cmr/ustfitum Wittr, E.
G. Meneghinii Breb. E. M. W. H.
G. abruptum Lund. E.
G. ahbreviatum Racib. E.
G. concinnum Rabenh. E.
G. angulosum Breb. E.
G. iinpressuJum Elfv. E.
G. striatum Boldt. E. M. H.
G. holmicnse Lund. E. — /3. integrum
Nord. E.
G. tetraophtludmum Kg. E. ft.
LundelUi Wittr. E.
G. marqaritiferum Turp. E.
G. reniforme (Ag. ?) Ralfs. E. P.
C. Turneri, n. sp. E. B. Ralfs includes three species under
his murgaritiferum. The first is his margaritiferum proper (Tab. xvi.
fig. 26, c, and d). It has a zygospore with elevations all over it,
or, as Mr. Archer expressively puts it, "covered with bull's-eyes."
The second is his reniforme {I.e., fig. 2a). This has a perfectly
smooth zygospore. To the third Ralfs gives no varietal name, but
he figures it with its zygospore, which is covered with spines, on
Tab. xxxiii. fig. Qh (not Qa). Length, 461-48 /x; breadth, 38-39/y,;
do. isthmus, 12-13 /x; thickness, 25^ /x; diameter of zygospore,
44-45 p
; length of spines of do., 8 /a. It gives me much pleasure
to connect the name of Mr. W. Barwell Turner, Leeds, with this
very distinct species. He is a distinguished microscopist, and has
done -excellent Desmid work.
C. Wittrockii Lund. E.
G. subpwictulatum Nord. & Berg.
E. H.
G. Bhjttil Wille. E.
G. calcareuvi Wittr. E,
G. Botrytis Menegh. E. P. B.
W. H. ^.emarginatumHoxi&q,.
E. B.
C. gemmij'enim Breb. E.
G. oehthudes Nord. E. B.
G. subcrenatum Hantzsch. R. II.
G. Gorbula Breb. E.
G. ornatum Ralfs. E.
G. gradatum Roy. B.
Arthrudesnnis oetocornis Ehr. E.
A. IncMH Ilassall. — f. divcrgens
Archer. E.— f. cunvergens Archer.
E.
A. convergens Ehr. E.
Staurastriiin dejectumJjfch. E.
])atens Nurd. ft. E.
Journal of Botany.—Vol. 28.
S. apiculatum Breb. W.
S. miicronatum Ralfs. E.
S. glabrum. Ehr. E. Like dejeetidii,
but spines straight and
inflexed. Length = breadth
breadth with spines,
= 19'2 /x ;
22-4 fx; length of spme, /x
length of side in end view,
with spines, 22-4 /x ; do. with-
out, 19-2 /x; diameter of globular
zygospore, 25-G /x, without
spines ; length of spine,
14-4 fj.. Spines numerous,
simple, subulate, base broad.
S. Diekiei Ralfs. E. W.
S. ciiftfjidatiim Breb. E.
,S'. O'Mnirii Archer. E.
S. brevispi)iiitn Breb. M.
S. olif/acanthum Breb. E. W.
S. Avirula Breb. E.
S. J'lircigerum Breb. E.
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