QUARTERLY CHRONICLE. 55 
of Dr. Hulke’s are among the roughest pen-and-ink sketches 
we ever saw lithographed. How is it that even a new journal, 
with every opportunity, such as this is, cannot find an artist 
who will produce a plate fit to be compared with those issued 
in German periodicals ? 
Journal of Botany.—In the September number of this maga- 
zine is a paper “‘ On Pollen-grains as Diagnostic Characters,” 
by Professor Gulliver. He shows that a microscopic exa- 
mination of the pollen may afford good diagnoses between 
closely allied species. Of two plants, standing side by side 
in our Flora, the pollen-grains of Ranunculus arvenis are large, 
and rough on the surface, while those of R. hirsutus are much 
smaller, and smooth on the surface. 
A new distinction also appears in the pollen between Lotus 
corniculatus and L. major, the pollen-grains being regularly 
larger in the former than in the latter plant. This curious 
fact, if confirmed, will be in direct opposition to the conclu- 
sion of many eminent botanists, that L. major is “ ee a 
variety, larger in all its parts,’ > of L. corniculatus. 
“On the Frond-cells of Lemna and Wolffia.’—The same 
observer, in the December number, states that there is this 
remarkable microscopic difference between Wolfia arrhiza 
(lately discovered in this country by Dr. Henry 'Trimen) and 
Lemna minor; the latter abounds in raphides, while the 
former has none at all. 
Medical Times and Gazette. Nov. 17th.— Striped Muscle,” 
by C. Macnamara, M.D., Surgeon to the Calcutta Ophthalmic 
Hospital— When a man comes forward and says, “I have 
been working with a -!,th objective,” and speaks of “ twelfths”’ 
and ‘‘ twentieths” as low powers, his observations cannot fail 
to interest the readers of this Journal. We therefore extract 
here the greater part of a paper by such an author ; at the 
same time, we by no means give our sanction to, nor are we 
in a position to reject, his statements, which are certainly 
remarkable in some ways : 
** During the past ten years I have been working more or 
less steadily with one of Ross’s eighth and one sixteenth of 
an inch glass, but within the last six months with a Powell 
and Lealand’s one fiftieth of an inch, magnifying about 2800 
diameters, and with it the observations I have now to detail 
have been made. Of the various kinds of muscular tissues, 
the mylohyoid of the chameleon affords, probably, the most 
beautiful specimens. Dr. Beale’s little favorite, the Hyla 
arborea, is not, I fancy, to be had in India; the Hyla versi- 
color may, however, be procured, but does not, according to 
my experience, afford such perfect specimens as the chame- 
