96 
Notes on Recent Literature. 
evecta Mm. Bertrand and Cornaille distinguished 113 separate 
bundles arranged in four series. 1 In Tietea the trace has not so far 
been found to consist of more than three series, and though the 
exact number of bundles is not mentioned by Count Solms it was 
evidently much inferior to the number recorded for the petiole of 
Angiopteris. But it is probable that in the free Tietea -leaf the 
number of series of bundles may have equalled or exceeded that in 
Angiopteris , for at the point of entry into the stem the Marattiaceous 
leaf-trace is much simplified. Finally, in the shape of the individual 
bundles of the trace and in the details of its development, notably 
in the relation of the external series of bundles entering the sheath, 
and the Marattiaceous stipular bundles to the rest of the trace, the 
two types are markedly different. These differences and the 
apparent impossibility of deriving the stelar system of Tietea from 
a Marattiaceous type, seem to preclude the possibility of a close 
affinity between Tietea and the Marattiaceae. 
1 Bertrand, C. E., and Cornaille, F. “ Etude sur quelques caract^ristiques 
de la structure des filicinees actuelles. I. La masse liberoligneuse 61ementaire 
des filicinees actuelles et ses principaux mode d’agencement dans la fronde.” 
Travaux et memoires de l’Universite de Lille, Tome X, No. 29, 1902, p. 167. 
ISABEL M. P. BROWNE. 
CHONDRIOSOMES (MITOCHONDRIA) AND THEIR 
SIGNIFICANCE. 
By F. Cavers. 
Introduction.—Animal Chondriosomes. 
A CONSIDERABLE literature, including a large proportion of 
controversy, has grown during the last few years around 
certain cell constituents, first observed in animals and later in 
plants and variously termed “ chondriosomes,” “ mitochondria,” 
“ chondriomiten,” “ chondriokonten,” etc. 
The name applied originally (in 1886) by La Valette St. George 
who appears to have been the first to describe, or at any rate to 
name, these bodies was “ cytomikrosomen.” This writer found in 
the male cells of certain insects small highly refractive bodies which 
showed dense rntra vitam staining with Dahlia and were either 
isolated or arranged in filaments. Henking (1891) and Toyama 
(1894) described similar bodies in their observations on spermato¬ 
genesis in insects. Apparently, however, the first detailed investi¬ 
gation of these bodies was made by two other zoologists, Benda 
and Meves, each of whom published a long series of papers on the 
subject—Benda’s papers ranging from 1897 to 1902 and those by 
