2 ART. 4. — A. YASUDA : ON THE 



Cucurbitacea?, including that of the leaf-traces and of the bundles 

 in the leaves themselves. A further investigation was conducted 

 by Lotar/^ who compared the structures of the stems, hpyocotyls, 

 leaves, tendrils, roots, and seeds of many genera in this family, 

 such as Gitrullus, Lagenaria, Luffa, Goccinea, Cucumis, Oucurbita, 

 Cyclanthera, Sicyos, Momordica, Abohra, Rhyncliocavpa, Bryonia, 

 Ecballium, and Thladiantha. In his essay he described in great 

 detail the distribution of the fibro-vascular bundles, with accompany- 

 ing diagrammatic figures. Fischee,^^ examined the arrangement 

 of the sieve-tubes in the stems of several genera, and classified 

 them under four heads : (a) vascular-bundle sieve-tubes, (b) ecto- 

 cyclic sieve-tubes, (c) entocyclic sieve-tubes, and (d) commissural 

 sieve-tubes. 



He also referred to the mode of distribution of the sieve-tube 

 system, and described six distinct types : (i.) Alsomitra type, (ii.) 

 Luffa type, (iii.) Bryonia type, (iv.) Cyclanthera type, (v.) Lagenaria 

 type, and (vi.) Cucurbita type. Penzig"^^ observed in the epidermal 

 cells on the under surface of the leaves of 3Iomordica echinata 

 and M. Charantia, globular cystoliths which, he found, oc- 

 curred in groups, radiating from a common centre. In regard 

 to tendrils Warming,^^ Dutailly,'^' Cogniaux,*^^ Müller,^^ and 



1) Henri-Aimé Lotar. Essai sur I'anatomie comparée des organes végétatifs et des 

 téguments séminaux des Cucurbitacées. Lille 1881. 



2) A. Fischer. Untersuchungen über das Siebröhrensystem der Cucurbitaceen. Bot. 

 Centralbl. 1885. Ed. XXI. No. 4. 



3) O. Penzig. Zur Verbreitung der Cystolitlien im Pflanzenreich. Bot. centralbl. 1881. 

 Bd. VII L No. 13. 



4) E, Warming. Verzweigungsverhilltnisse der Phanerogamen. König, deutsch. Acad. 

 der Wissenschaft. 1877. 



5) G. DUTAILLY. Recherches organogéniques snr les formations axillaires ches les 

 Cucurbitacées. Association français pour l'avancement des sciences. Congrès de Harure. 1877. 



C) A. CoGNiAUx:. Cncurl)itaceen in De Candolle's Monographiie Phanerogamarura. 

 1881. Vol. III. 



7) E. G. O. Müller. Untersnchnngen über die Ranken der Cucurbitaceen. Cohn's 

 Beiträge zur Biologie der Pflanzen. 188G. P.d. IV. lieft 2. 



