JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE V, 
Tilustrating Mr. Brightwell’s paper on Rhizosolenia. 
‘ig. 
Te aniensdlonis ornithoglossa, copied from Ehrenberg. 
2.— Fe Calyptra, ditto. 
3.— A Americana, ditto. 
4.— hebetata, Bailey. Original figure. 
5.— 1 styliformis, n. sp. A very small entire frustule. 
Aes i calyptriform valve, detached, seen on the 
ventral aspect. 
Dieah53 4 calyptriform valve, dorsal aspect, and proximal 
portion of a frustule, breaking up. 
calyptriform valve, lateral aspect, aud portion 
of a frustule attached. 
ible A portion of one of the slenderest frustules, 
lengthening ‘of intermediate portion, and 
formation of new “ annuli.” 
portion of the broadest frustule yet found, 
-0053 in diameter. 
6.—Rhizosolenia imbricata, n. sp., in self-division. 
7.—a. 5; setigera, u. sp., self-division just commenced. 
Be lis » the same state, further advanced; the trans- 
parent portion above the dotted line was seen by Col. Bad- 
deley (to whom we are indebted for the drawings from 
which figs. 7 a, 7 6, 7 c, were taken) to become detached and 
thrown off. 
c. R. seligera, showing the very faint markings on the intervalvular 
portion of the frustule. 
9.---Rhizosolenia alata, nu. sp., from a sketch by Mr. G. Norman, of Hull. 
a. . portion of another frustule, original sketch. 
C. >) 23 
é. 39 29 
The figures all magnified 400 diameters, except those taken from Khrenberg. 
