107 
Other illustrations may be given to show the connection be- — 
tween a knowledge of the anatomy of tissues and that of their 
physiology. If a leaflet of the sensitive plant be touched in a 
certain way, it closes, and one after another all the remaining 
_ leaflets follow its example in regular order of succession. How 
is the effect communicated from the first leaf to the second and 
soon? This question has already occupied much time and energy 
in its attempted solution, but how can one hope to be able to add 
anything to that already known about it, without a thorough 
knowledge of the anatomy of the tissues through which the stim- 
ulus passes! Another more hackneyed subject, but even better 
than this as an illustration, is the so-called water question. If any 
one doubts the necessity of training in anatomy as requisite to 
physiological study, let him attempt to explain the present theory 
of the ascent of water through the trunks of high trees, to a per- 
son ignorant of plant anatomy. 
In one of the editions of Gray’s structural botany in speaking 
of the various departments of the science, he says: “A complete 
system of classification can only be made when.our knowledge of 
all the other departments becomes complete.” If this is the end 
toward which we are all striving, the importance of a propor- 
tionate and symmetrical development of the various branches can 
hardly be over-estimated. 
Notes on Some Algz in the Herbarium of the Long Island Historical 
Society, 
By w. G. FARLOW. 
Recently I received from Dr. Jelliffe some specimens of marine 
alge from the collections of Mr. J. Hooper, Mr. Calverly and Col. 
Pike, now in the Herbarium of the Long Island Natural History 
Society, and since several of the species are scarcely to be found 
in other herbaria, the following notes may be of interest. 
Of Callithamnion Dietziea, Hooper, three specimens, were sent. 
That numbered 109 is the type specimen, and out of it was cut a 
piece which is now the only specimen of the species in the Harvey 
Collection in Trinity College, Dublin. Another specimen without | 
