1885.] 



MICROSCOPICAL JOURNAL. 



51 



or two rows of thick fibres of a sub- 

 dued yellow color. 



Lonj^itudiiially, fibres very fine, 

 regular, full, smooth, pliable, and 

 curling easily ; the central canal is 

 rarely visible in the smaller ones, ap- 

 pearing in the larger like a very fine 

 line ; fibres very distinct in the bun- 

 dles, from which they are easily sep- 

 arated ; points elongated and sharp. 

 Color not very marked, often entirely 

 wanting. Among these almost color- 

 less fibres are found larger ones, very 

 stift'and not so long, protruding from 

 the inner line of the fibro-vascular 

 bundles. 



L. 5""" ; o""", oo6 ; 



R. 830 Pine Apple. 



CLASS B. 



SECTION I. 



Dicotyledons. 



This section is composed of the Hibiscus, 

 the Flag, tlie Jute and the Daphne. 



I . Polygonal sections with straight 

 sides, the central orifice rounded or 

 oval with smooth edges. 



a. Sections yellow, polygonal, with 

 straight sides and sharp angles, en- 

 closed in a network of a rather sub- 

 dued yellow, forming compact groups 

 of rectangular shape ; central open- 

 ing generally small, always rounded, 

 smooth and empty ; concentric layers 

 sometimes of marked thickness ; fis- 

 sures in the walls, perpendicular to 

 the exterior and interior contours. 



Longitudinally, fibres yellow, stifi", 

 broken, very irregular in diameter ; 

 with slender points rounded at the 

 end, some having notches or sinuosi- 

 ties ; fibres frequently found having 

 very thin partitions and in ribbons. 



L. 5"""; D. 0,021 ; 



R. 240 Hibiscus. 



b. Sections generally very small, 

 polygonal, with straight sides and 

 sharp angles, collected into compact 

 groups, enclosed in a network of a 

 rather subdued yellow, with very fine 

 meshes, which they exactly fill ; cen- 

 tral orifice very small, punctiform. 



Longitudinally, fibres, very short. 



fine, stifl', very full, with sharp or ir- 

 regularly formed points. 



L. 2"""; D. o""", 016; 



R. 125 Flax. 



c. Polygonal sections with straight 

 sides and sharp angles, forming very 

 compact groups, or else found in close 

 contact ; central orifice generally quite 

 large, round or oval, with smooth 

 edges, always empty. • 



Longitudinally, fibres of a golden 

 yellow color, collected into compact 

 bunches, very short, stiff' and smooth, 

 not striated, but often presenting 

 notches or curves on the edges, es- 

 pecially near the points. The central 

 canal appears in the form of a dis- 

 tinct band in the center of the fibre ; 

 on each side borders of a subdued yel- 

 low indicate the thickness of the par- 

 titions, defined by very plain lines ; 

 the ends terminate abruptly, being 

 rounded or of irregular shape. 



L. 2""" : D. o""", 022 ; 



R. 90 Jute. 



2. Round, oval, or bent sections, 

 like those of cotton, to which they 

 are very similar in form, but from 

 which they are distinguished by their 

 yellow color ; interior cavity elongate, 

 linear and empty. 



Longitudinally, fibres, very fine, 

 yellow, smooth and not adhering to 

 each other ; many specimens very 

 large toward the center, tapering 

 rapidly to slender, rounded ends ; 

 the swelling sometimes very marked 

 in the folds. 



L. 5""" : D. o""".oi ; 



R. 500 Daphne. 



SECTION II. 

 Monocotyledons. 

 This section contains Phormium tenax. 

 Abaca, the Coco, the Sanseviera and 

 the Pita or Aloes. 



I. Sections the forms of which are 

 more often rounded than polygonal, 

 and whose central orifice is also 

 rounded ; with traces of fibro-vascu- 

 lar bundles. 



a. Very small sections, of a pale 

 yellow when thin ; those which have 

 polygonal forms have obtuse angles ; 



