416 M.U^w.Mohl on the Structure of ChlorophylL EXPLANATION OF PLATES X. and XL Plate X. Mff. 1. Phalangium cornutum, body of the female: a, side view of the cephalothorax ; b, part of the cephalothorax and one of the falces of the male. ^ig. 2. Phalangium urnigerum, body of the female : a, side view of the .• cei)halotliorax ; b, side view of the body with the falces and palpi ; c, body of the male ; d, one of the falces. Mg. 3. Phalangium parietinum, body of the female : a, side view of the cephalothorax. Fig. 4. Megabunus corniger, body of the male : a, eye-eminence seen from above ; b, side view of the same ; c, one of the falces of the male ; d, palpi of male and female. i^ig, 5. Megabunus insigniSy body of the female : a, side view of the eye-eminence; 6, the same seen from above; c, one of the legs; d, side view of the body. Plate XL Fig. 6. Opilio histrix, body of the female : a, side view of the eye-eminence ; b, one of the legs ; c, frontal teeth. Fig. 1 . Leiobunus rotundas, body of the female : a, body of the male, with one of the palpi attached; b, side view of the eye-eminence; c, one of the legs ; d, one of the palpi. Fig. 8. Nemastoma chrysomelas, body of the female : a, side view of the body in the male, showing one of the palpi and falces ; b, eye-eminence or scale ; c, apex of the abdomen ; d, one of the falces in the female ; e, the same in the male. Fig. 9. Homalenotus quadridentatus, the body with legs and palpus at-tached on one side. XXXVI. — On the Structure of Chlorophyll. By Hugo von Mohl. [Concluded from p. 329.] With the pellicular form of the chlorophyll, such as occurs in Zygnema (and in still more intimately connected layers in Dra^ parnaldia, Ulothriac, &c.), as a more or less perfect investment of the cell-wall, is connected in many respects the chlorophyll of Anthoceros, for this, in like manner, does not possess the form of isolated grains, but presents itself in every cell as a single chlorophyll-mass, which in a portion of the cells has a mem-branous form. But the chlorophyll of Anthoceros is distin-guished from that of Zygnema^ by the fact that in the latter genus it stands in no direct connexion with the central nucleus^ and forms a peripherical layer, while in Anthoceros the green colouring matter is connected with one of the masses of proto-plasm enveloping the nucleus, and, at least in a portion of the cells, occupies a central position.
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