126 



THE SECOND-CHROMOSOME GROUP 



tion, and the earlier experiments were relatively simple. In the case 

 of several of the mutants found very early, Uttle more than a review 

 of the extensive work abeady published has been given. 



A chronologically arranged list of all these mutants, together with 

 a sumniiiry of main points with respect to their origin, locus, etc., is 

 given in table 1. 



Ta ule 1 . — Chronologically arranged list of 1 1 -chromosome mutant genes treated in this paper. 



Mutant 

 gene. 



Speck. 



Olive 



Truncate. 

 Black 



DalliK)n . 

 Vealigial . 



Lethal T' . 

 Blistered . 



Jaunty . 

 Curved. 



Purple . 

 Strap . . 

 Arc . . . . 



Gap 



Antlered . 



Dacbs. . . 



Streak . 



Comma*. . 

 Morula. ... 

 Apterous*. , 



Cill 



Ciir 



Cream II*. 

 Patched*. . 



Trefoil*... 



Cream 6*. . 



Pinkish* . 

 Plexus ... 

 Limited. . . 

 Confluent*. 



Fringed*. 

 SUr 



Nick 



Dachs-lcthal 

 Squat* 



Lethal Ila.. 

 Telescope . . . 



Modifiers. 



Dachsoid 



Affects mainly- 



Fig. 



Axil of wing. 



Body-color. . 

 Wing-length. 

 Bodv-color. . 



Wing, venation. 

 Wing, balancer. 



Life 



Venation. 



Wing curvature. 

 Do. 



Eye-color 



Wing 



Wing curvature. 



Venation . 



Wing 



) Venation 

 I Legs 



Thorax pattern. 



Thorax marks. . 



Eye-facets 



Wing, balances. 

 II crossing-over. 

 Do. 



Eye-color 



Abdomen 



Thorax pattern . 

 Eye-color 



Do. 

 Venation. 

 Abdomen. 

 Venation. 



Wing 



Eye-faceta . 



Wing. 

 Life.. 

 Wing, 



Life 



Abdomen, wing . 



Dichsete . 



■ 



Venation . 



PI 5, figs. I 

 and 4. text- 

 fig. 73. 



PI. .'■>, fig. 1., 



PI. 6 



PI. 5, fig. 2.. 



PI. 7. fig. 1.. 

 PI. 7. fig. 2. . 



Text-fig. 74 



PI. 7, fig. 3. 

 Text-fig. 75 



PI. 5, fig. 8. 



PI. 8 



PI. 7, fig. 4. 



Text-fig. 76 . 



PI. 9 



PI. 10 



Figs. la-Id.. 



/PI. 5, fig. 5.. 

 \P1. 10, fig. 2, 



Text-fig. 79 

 PI. 10, fig. 3, 

 PI. 7, fig. 5. 



PI. 5, fig. 10 

 PI. 11 



J PI. 5, fig. 6.. 



\P1. 8. fig. 1.. 



PI. 5, fig. 11 . 



PI. 5, fig. 12. 

 Text-fig. 80. 

 Text-fig. 81 



Text-fig. 82 

 Text-fig. 83 



Text-fig. 84 



Text-fig. 85 



PI. 7. fig. 6. 



Text-fig. 86 



Sym- 

 bol. 



Locus. 



sp 



ol 



r 



b 



ha 

 Vg 



It 



} 

 c 



Pr 



Vgl 



a 

 gp 



tgO 

 d 



St 



mr 



CilJ 

 Clir 

 crii 



I" 



crb 



Px 

 C/ 



fr 



S' 



tgn 

 dl 

 Sa 



Ina 

 tt 



S' + Primary base 



105.1 



106.1= 

 28.0 

 46.5 



105.5 

 65.0 



103 = 



46.7 

 73.5 



52.7 

 65.0 

 98.4 



c-l-31.6 



sp+ 1. = 

 S'-t-28.0 



65.0 

 29.0 



15.4 



106.3 

 48.5 



50 



22.5 



100. -I- 

 96.2 

 106.3 



98.0 = 

 0.0 



65.0 

 29.0 

 35.5 



62 

 66, 



«j7+0.4 

 pr+l2.3 



r=fcl5 

 sp— 2 



6+0.2 

 pr+20.8 



b+ 6.2 

 rff± 0.0 

 sp -6.7 



tg=>= 0.0 

 6-18.5 



d-13.6 



Sq =t 15 

 a+ 7.9 



S'-t-48.5± 

 6-? 



pi—? 



Date 

 found. 



64-60 : 

 Sp- 8.9 

 mT+7 



6+51.5 

 St-15.4 



va± 0.0 

 d=t 0.0 

 6-11.0 



c-10.8 



sp- 



1910 

 Mar. — 



May — 

 Aug. — 

 Oct. — 



Nov. — 

 Dec. — 



1911 

 Feb. — 

 Nov. 16 



Dec. 11 

 Dec. 24 



1912 

 Feb. 20 

 Apr. — 

 May 24 



July 10 

 Sept. — 

 Oct. — 

 Nov. 22 



Nov. 27 



1913 

 Feb. 5 

 Mar. 8 

 Aug. — 

 Sept. — 

 Sept. — 

 Sept. 15 

 Nov. 25 



Nov. — 



1914 

 Mar. 10 



July 27 

 Aug. 20 

 Sept. 13 

 Sept. 23 



1915 

 Jan. 20 

 Feb. 12 



May 7 

 Oct. 6 

 Nov. 29 



Dec. 2 

 Dec. 27 



1916 

 Aug. 13 



1917 

 Feb. 9 



Arose from — 



Wild stock . 



Do. 



Beaded stock. . 

 Miniature ex- 

 periment. 

 Truncate stock 

 Do. 



Do. 



Rudimentary 



stock. 



Do. 



Do. 



Tg stock 



Do. 

 Black-palpi 

 stock. 



bXa 



Vg experiment 



Sable experi- 

 ment. 



'Lop' stock. . 



dXpink 



peach Xwild .. 

 wm stock. ... 

 " Nova Scotia' 



Do. 

 Lethal 2 stock 



Culture 

 No. 



Non-disjunc- 

 tion. 



Eosin 6 stock . 



Spread stock. 



mr stock 



Non-disjunc- 

 tion. 



Jaunty I 



Non-disjunc- 

 tion. 



Lethal 2 



S'Xd 



Non-disjunc- 

 tion. 



S'b c stock . . . 



'Crooked' ex- 

 periment. 



D stock 



Eosin X 'seple' 



A 23 



A 34 

 A 43 



A 66 

 BSO' 

 B42 



C146 

 C149 



II 9 

 M20 



M68 



82 



557 

 511 

 550 



1,042 

 1,347 



2,012 

 2,217 

 2,480 



2,675 

 2,735 



2,671 



*Th« mutations marked with the asterisk (*) are no longer on hand, having been lost or discarded. 



