INDEX TO STRUCTURES AND SUBJECTS 



65 



Cl. i.): X. 39-40, XI. 41-42, XII. 43-46 (s. horiz. Cl. I.) : 



XXIV. 100 (oyclopia), 105, 106 (supernumerary eyes) : 



XXV. 107-110 (oyclopia and semi-cyclopia). 

 Eyes, muscles. See under obliquus and rectus. 



Fins. See under anal, caudal, membrane dorsal and ventral 

 edge, pectoral, pelvic. 5.4-56', 61 (abnormalities of) : 55, 

 56, 61 (fin rays). 



Fishes. See special Index, 68, 



Fission, S (of embryonic rudiment) : 27, 38 (of embryonic axis 

 in hemididymus) : 54 (of single axial structure). 



Fontanelles, 11 (normal) : 13 (Cl. I.) : 16 (Cl. 11.) : /l,/2,/3 

 in XVII. 57 (normal), 59 (Cl. I.), 61 (Cl. n.) : XXI. 89, 

 92 (diagrams). 



Fowl. See under birds. 



Fragmentation of ova, 30. 



Frequency, 1 (of double monstrosity in fishes and birds) : 33 

 (of triple monstrosity in fishes and birds) : 7, 28 (of differ- 

 ent types of double monstrosity) : 41 (of cyclopia). 



Frog larvae, 44- 



Fusion, 4, 6 (primary) : 4, 11, 15, 30 (secondary) : 40-44 (of 

 cerebral lobes, mid-brain, eyes, etc., in cyclopia) : 12-29 

 (of homologous structures at transitional region in double 

 monstrosity, passim). 



Ganglion, nerve V., 14 (Cl. I.): V. 22 (s. horiz. norm.): 



XXVI. Ill (semi-cyclopia). 



Ganglion, nerve VIII., 17 (01. II.) : IV. 17 (s. trans, norm.) : 



XIV. 51 (s. trans. Cl. n.). 

 Ganglion, vagus, 17 (Cl. n.) : IV. 18 (s. trans, norm.) : IX. 



38 (s. trans. 01. I.). 

 Gastrulation, 1, 30 (double in Petromyzon) : 6 (centres in 



double monstrosity). 



Germ cell, predisposition in, 5, 33. See also under autogenetic. 

 Germinal area, mammalian, S, 3S. 

 Gill. See also under pseudobranch and visceral arches. 34 



(triple monster) : 61 (absent) : 62 (variation in lamprey) : 



62 (replacing teeth) : XI. 42, XII. 45, 46 (s. horiz. 01. I.) : 



XVI. 54 (s. horiz. 01. ill.). 

 Gill cover, 61 (absent or deformed) : V. 23 (s. horiz. norm.) : 



XVI. 54 (s. horiz. Cl. HI.). 

 Glomerulus of head-kidney, 10 (absence) : 12 (normal) : 14 



(01. i.) : 18 (Cl. n.) : 19 (01. in.) : V. 23 (s. horiz. norm.) : 



XI. 41 (s. horiz. 01. I.) : Ol in XX. 83 (normal), 84, 85 



(01. i.): 86 (Cl. iv.): 87 (01. in.). 

 Glossohyal. See copula visceral arch II. 

 Gonads, 47, 48 (in hermaphroditism) : 62 (defects). 

 Grooves, 24 (on surface of yolk) : 41, 42 (in floor of brain in 



cyclopia) : 59 (in supernumerary eye). 



Haemal arch cartilage, 12 (normal) : 13 (01. I.) : 17 (01. II.) : 



52 (hemididymus): IV. 19 (s. trans, norm.) : XII. 43 (a. 



horiz. Cl. i.) : XVI. 55 (a. horiz. Cl. in.). 

 Harelip, apparent, in a trout embryo, 59. 

 Head-kidney or pronephros, 12 (normal): 14 (Cl. I.): 18 



(01. II.): 19 (01. in.): 20 (Cl. IV.): IV. 19 (s. trans. 



norm.): V. 23 (s. horiz. norm.): XI. 41, XII. 45 (s. 



horiz. 01. i.): XXII. 96, XXIII. 97 (triple monster): 



HK in the last five Figs, cited under glomerulus. 

 Hemididymus, 25-29 (in Salmonidae) : 26 (in Esox) : 55 



(doubling of dorsal fin) : 52 (twisting of body). See also 



under katadidymus and mesodidymus. 



Hereditary nature, of abnormalities, xi, 50. Sec also 53. 



Hermaphroditism, 46-48. 



Hernia in a dogfish, 62. 



" Heterocercal," portion of tail, 12 (normal): 31, 22 (01. 



VI.). 



Hiatus or cleft, in mesodidymus, 25, 26, 28. 



Hog-back. See under hump-back. 



Homoeosis, 56, 58. 



Homologous or identical twins, 7, 37 : triplets, 38. 



Hooking of dorsal fin in flat fishes, 55, 57. 



Hump-back, 51-53. 



Hyoid artery, 12 (normal) : 14 (01. I.) : 17 (01. n.). 



Hyoid cartilage. See under visceral arch II. 



Hyomandibular, 11 (normal): 13 (Cl. i.): 16 (Cl. n.): 49 

 (pug-head): 50 (round-head): IV. 17 (s. trans, norm.): 

 V. 23 (s. horiz. norm.) : XL 41, 42, XII. 45, 46 (s. horiz. 

 CL i.): XIII. 48, XIV. 49, 51 (s. trans. 01. n.): in 

 XVII. 56 (normal), 58 (01. i.), 60 (01. ir.): XXI. 88, 89 

 (diagrams): XXVI. Ill (cyclopia). 



Hypoaria, 13 (01. I.): 41, 42 (cyclopia): IX. 37 (s. trans. 

 01. i.): XI. 41, 42, XII. 45 (s. horiz. Cl. I.): XIV. 50 

 (s. trans. Cl. n.) : Hya in XVIII. 72 (01. I.). 



Hypohyal. See under basihyal. 



Hypophysis, 13 (Cl. I.) : 41, 42 (cyclopia) : 50 (double) : V. 23 

 (s. horiz. norm.) : XI. 41, 42, XII. 45, 46 (s. horiz. 01. i.): 

 Hyp in XVIII. 72 (01. 1.). 



Induced, abnormalities. See under acquired. 



"Individualities," mixing of, in double monster, 60. 



Infundibulum, 13 (01. i.) : III. 16 (s. trans, norm.) : V. 23 (s. 

 horiz. norm.): VIII. 36 (s. trans. Cl. i.) : XII. 45, 46 (s. 

 horiz. 01. i.) : XIV. 49 (s. trans. Cl. n.) : Inf in XVIII. 

 72 (Cl. i.): XXV. 109, 110 (semi-cyclopia). 



Injury, mechanical, 53, 62. See also under experimental. 



Intestinal canal, 12 (normal): 15 (01. I.): 18 (01. n.): 19 

 (01. m.) : SO (01. iv.) : 21 (Cl. v.) : 23 (Cl. VI.) : 25 (hemi- 

 didymus) : 34 (triple monster) : 62 (hernia) : IV. 20, VI. 

 24 (s. trans, norm.) : VI. 27, XXVI. 114 (s. trans. Cls. v., 

 vi.): XVI. 54 (s. horiz. 01. in.): XXVI. 113 (absent 

 notochord) : XXII. 95, XXIII. 97-99 (triple monster). 



Invertebrates, 5 (ova). 



Islay, tailless trout from, 56. 



Iter or Sylvian aqueduct, III. 16 (s. trans, norm.): IX. 37 

 (s. trans, a. I.) : XIV. 50 (s. trans. Cl. n.) : XV. 53 (s. 

 horiz. 01. in.): Git in XVIII. 69-71, XXV. 110 (semi- 

 cyclopia). 



Jaws. See under visceral arches. Also 41< 4% (cyclopia) : 4$ 

 (pug-head) : 50 (round-head) : 51 (lower absent) : 59 

 (accessory) : 62 (gill tufts instead of teeth) : 62 (mouth 

 absent): VIII. 35 (s. trans. Cl. I.): XVI. 54 (s. horiz. 

 01. in.): XXV. 107, 108 (cyclopia). 



Jugular vein, 18 (01. n.): 19 (01. in.): IV. 18 (s. trans, 

 norm.): IX. 38 (s. trans. 01. I.): XIV. 51 (s. trans. 

 01. n.): VI in XIX 73 (normal), 74 (01. HI.), 75 

 (01. iv.). 



Katadidymus, 3, 5, 6, S, 25. See also under hemididymus. 

 Kidney, 62 (variations in). See also head-kidney, Wolffian 



body. 



Kirkcudbright, tailless trout from, 56. 

 Kupffer, two vesicles of, 29. 



