NERINE. 



501 



does not gelatinize more rapidly than the rest of the 

 grain and that the most resistant portion of the grains 

 instead of being just distal to the hilum is at the distal 

 margin. There are, however, a few grains in which 

 gelatiuization begins at the distal end, as in N. bowdeni, 

 and proceeds as described under IV. bowdeni. 



The gelatinized grains are large but are not so dis- 

 torted as in IV. bowdeni, and they retain some resem- 

 blance to the form of the untreated grain. 



The reaction with calcium nitrate begins in rare 

 grains in 1 minute. Complete gelatiuization occurs in 

 about 0.5 per cent of the entire number of grains and 



1 per cent of the total starch in 5 minutes ; in about the 

 same percentage of the grains and 2 per cent of the total 

 starch in 15 minutes; in about 1 per cent of the grains 

 and 8 per cent of the total starch in 30 minutes ; in about 

 3 per cent of the grains and 12 per cent of the total starch 

 in 45 minutes ; in about 6 per cent of the grains and 16 per 

 cent of the total starch in 60 minutes. ( Chart D 224.) 



The reaction with uranium nitrate begins in a few 

 grains in 1 minute. Complete gelatinization occurs in 

 about 0.5 per cent of the entire number of grains and 3 

 per cent of the total starch in 5 minutes; in about the 

 same percentage of the grains and 4 per cent of the total 

 starch in 15 minutes; in about 1 per cent of the grains 

 and 6 per cent of the total starch in 30 minutes ; in about 



2 per cent of the grains and 12 per cent of the total 

 starch in 45 minutes; in about 5 per cent of the grains 

 and 18 per cent of the total starch in 60 minutes. (Chart 

 D225.) 



The reaction with strontium nitrate begins imme- 

 diately. Complete gelatinization occurs in about 20 

 per cent of the entire number of grains and 56 per cent 

 of the total starch in 5 minutes; in about 60 per cent 

 of the grains and 80 per cent of the total starch in 15 

 minutes ; in about 80 per cent of the grains and 88 per 

 cent of the total starch in 30 minutes; in about 84 per 

 cent of the grains and 95 per cent of the total starch in 

 45 minutes ; in about 95 per cent of the grains and 97 per 

 cent of the total starch in 60 minutes. (Chart D 226.) 



The reaction with cobalt nitrate begins in rare grains 

 in 1 minute. Complete gelatinization occurs in much 

 less than 0.5 per cent of the entire number of grains and 

 total starch in 5 minutes; slight advance in 15 and 30 

 minutes; in less than 0.5 per cent of the grains and 1 

 per cent of the total starch in 45 minutes, little if any 

 further advance in 60 minutes. (Chart D 227.) 



The reaction with copper nitrate begins in a few 

 grains in 2 minutes. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains 

 and 1 per cent of the total starch in 5 minutes ; in about 

 0.5 per cent of the entire number of grains and 2 per 

 cent of the total starch in 15 minutes ; in about the same 

 percentage of the grains and 3 per cent of the total 

 starch in 30 minutes; in about the same percentage of 

 the grains and 5 per cent of the total starch in 45 min- 

 utes; in about 1 per cent of the grains and 6 per cent 

 of the total starch in 60 minutes. (Chart D 228.) 



The reaction with cupric chloride begins in rare 

 grains in 2 minutes. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains 

 and total starch in 5 minutes; in less than 0.5 per cent 

 of the grains and 1 per cent of the total starch in 15 



minutes; very slight advance in 30, 45, and 60 minutes, 

 respectively. (Chart D 229.) 



The reaction with barium chloride begins in rare 

 grains in 2 minutes. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains 

 and 0.5 per cent of the total starch in 5 minutes; 

 little if any further progress in 15, 30, 45, and 60 min- 

 utes, respectively. (Chart D 230.) 



The reaction with mercuric chloride begins in a few 

 grains in 2 minutes. Complete gelatinization occurs in 

 about 0.5 per cent of the entire number of grains and 

 2 per cent of the total starch in 5 minutes ; little if any 

 further advance in 15, 30, 45, and 60 minutes, respec- 

 tively. (Chart D 231.) 



NERINE GIANTESS (HYBRID). 



(Plate 7, fig. 39; Charts D 211 to D 231.) 

 HISTOLOGIC PROPERTIES. 



In form the grains are usually simple and isolated, 

 and the number of compound grains and of aggregates 

 is much less than in IV. bowdeni, but slightly more than 

 in IV. sarniensis var. corusca major, and the compound 

 grains are like both the types noted exclusively in IV. 

 bowdeni and those which are common to both parents. 

 The grains are closer to IV. bowdeni in irregularity than 

 to IV. sarniensis var. corusca major, and the irregularities 

 are due to the same causes as noted in the grains of IV. 

 bowdeni; it is to be noted, however, that there are more 

 grains in which the irregularity is due to a secondary 

 set of lamellaa whose longitudinal axis is at an angle 

 with that of the primary set. The conspicuous forms are 

 elliptical, ovoid, triangular, plano-convex, and clam- 

 shell-shaped; and among the smaller grains round, 

 nearly round, and elliptical. There are also finger-like, 

 spatulate, lenticular, and pyriform, and a few of the 

 large irregularly quadrilateral and polygonal forms seen 

 in IV. boivdeni. 



In form IV. giantess is nearer to IV. bowdeni than to 

 IV. sarniensis var. corusca major. 



The hilum is as distinct as in IV. bowdeni, and is very 

 rarely fissured as in IV. sarniensis var. corusca major. 

 It is sometimes centric but usually eccentric from 0.42 

 to 0.22, commonly 0.3, of the longitudinal axis, the same 

 as in IV. sarniensis var. corusca major. 



In the character and eccentricity of the hilum IV. 

 giantess is nearer to IV. sarniensis var. corusca major 

 than to IV. bowdeni. 



The lamella are as distinct as in IV. bowdeni, but are 

 not so irregular as in those grains, but more than in 

 IV. sarniensis var. corusca major. They are, as a rule, 

 arranged as in IV. bowdeni. The number counted on the 

 larger grains varies from 14 to 30, usually 20, less than 

 in either parent. 



In the character and arrangement of the lamellae IV. 

 giantess is closer to IV. boivdeni than to IV. sarniensis var. 

 corusca major. 



In size the grains vary from the smaller which are 10 

 by 8ft, and 12 by 12^, to the larger elongated forms which 

 are 46 by 28ft, and 42 by 30ft, and the larger broad forms 

 which are 40 by 46ft and 36 by 34ft. The common sizes 

 are 34 by 26/i and 20 by 32ft. 



The grains are nearer in size to IV. sarniensis var. 

 corusca major than to IV. bowdeni. 



