Pd 
114 Correspondence of J. Nickles. 
ing each a nucleus. These protrusions become constricted and 
at last appear as little, or daughter-cells, on the surface of the 
parent-cell. ey now increase at the expense of this last, be 
come pedunculated, and finally appear as larger pedunculated cells 
attached around a common, insignificant centre. These are the 
b- 
served even twenty, though there are generally less. ‘Thus 
formed, their peduncles break off and they pass from the ovary 
proper into the other sections of the genital tube. 
‘here is one other point taken up in this connection by Meiss- 
ner, and to which we briefly allude as it has been a subject of 
discussion on a former page.* We refer to the wonderful Micro 
pyle of Keber, whereby it is alleged that the spermatic pa 
penetrate the interior of the egg and impregnate it. Meissner 
has seen nothing to justify the view that such a structure exists 
in the eggs of Mermis excepting the remains of the pedunele 
above mentioned, and this he is not sure of being hollow. More- 
over even if it were hollow, it appears to us wholly different 
- from the special structure insisted upon by Keb 
As to the embryonic development of Mains our author found 
nothing essentially different from what had been described by 
previous observers upon this order, (Grube, Leidy, &c.) There 
appears to occur no proper metamorphosis, and therefore the 
aad aed embryos more or less closely resemble in se 
, thea : 
is ole we repeat what we said in the beginning, that 
this memoir is one of the most excellent of its kind we have evel 
seen, and the care, patience and fidelity displayed therein will | 
ensure attention towards its author as one from whom much may 
be expect ted. 
—— 

Ant. XX.—Correspondence of M. Jerome Nicklés, dated Paris, % 
April 30, 1854. 
Dearn has tani made great havoc among the ranks of ee 
France. In the month of March alone, the Academy of Sciences lot 
two navigators, an herbie and a celebrated surgeon. Three® — 
these eminent men died at an advanced age; the fourth, M. Mau- 
vais, the astronomer, was but 45 years old, see came toa tragical end. : 
They have been co-laborers in the common field, and we shall re : 
pie — by giving some details of ‘teks life and labors an, 
or Roux was born in 1780 at Auxerre. In 1795 his atainmest a 
in Si were already so great t a he was admitted as an assi 
Surgeon in the armies of the Republic. In 1797 he came to Paris 
— on the espa seu. comer wie Noy. No. we 
p : 

