68 



INDEX TO STRUCTURES AND SUBJECTS 



Rectus oouli, interims, 14 (Cl. I.) : 41, 43 (cyclopia) : III. 13- 

 16 (s. trans, norm.) : V. 23 (a. horiz. norm.) : VIII. 35-36 

 (s. trans. Cl. I.) : XI. 41, 42, XII. 44 (s. horiz. Cl. I.): 



XIII. 48, XIV. 49 (s. trans. Cl. n.). 



Rectus oculi, superior, 14 (Cl. I.): 41 -42 (cyclopia) : III. 14- 

 16 (s. trans, norm.): VIII. 35-37 (s. trans. Cl. I.): X. 

 39-40, XL 41-42, XII. 45-46 (s. horiz. Cl. I.) : XIII. 47-48, 



XIV. 49-50 (s. horiz. Cl. n.) : XXV. 107-108 (cyclopia) : 

 XXV. 109-110 (semi-cyclopia). 



Reduplication, local, of notochord, S3 : IV. 20. 



Reptiles, 8, 29, 37 (double and multiple forms). See also 

 Lacerta, snake, Tropidonotus. 



Retina, 14 (Cl. I.): 41-43 (cyclopia): 59 (supernumerary eye): 

 III. 14-15 (s. trans, norm.): V. 21-23 (s. horiz. norm.): 

 VIII. 36, IX. 37 (s. trans. Cl. I.) : X. 39, 40, XI. 41, 42, 

 XII. 43-46 (s. horiz. Cl. I.) : XXIV. 104 (cyclopia) : XXV. 

 107-108 (cyclopia) : XXV. 109-110 (semi-cyclopia). 



Reversed flatfish, 57, 58, G2. 



Reversion, in descendants of pug-headed fish, 50. See also 

 atavism. 



Rhythm, of respiration and circulation in auakatadidymus, Sfy. 



Round-head, 49-50. 



Rudiment, embryonic, 6, 10 (in double monstrosity) : 37 (in 

 mesodidymus) : 29 (in parallel union) : 10, GO (pathologi- 

 cal conditions). 



Saccule, 34 (triple monster) : IV. 17 (s. trans, norm.) : V. 23 



(s. horiz. norm.). 

 Scales and tubercles on under side in ambicolonred flatfish, 57 : 



increased number, 63. 

 Sea urchin, ^7 (apparent protaudry in). 

 Secondary fusion. See under fusion. 

 Segmentation, syncytial in Salmonidae, 5 ; more than one 



centre of, 8, 37. 

 Segments, normal number, etc, 12, See also under muscle 



plates. 

 Semicircular canal, 17 (Cl. II.) : 34 (triple monster) : IV. 17 



(s. trans, norm.): V. 21 (s. horiz. norm.): X. 39-40 (s. 



horiz. Cl. I.): XIV. 49-51 (s. trans. Cl. n.): XV. 52-53 



(s. horiz. Cl. m.): ASc, PSc in XX. 82 (Cl. n.): XXV. 



110 (semi-cyclopia). 

 Semi-cyclopia, 24 (in anakatadidymus) : 44 (general account). 



See also 51. 



Sheep, 8, 37, 38, 39 (two germinal areas). 

 Shortening, 4S (of snout) : of body or tail, see under hump- 

 back : 56, 57 (of attachment of dorsal fin). 

 Sinus venosus, 19 (Cl. III.): HO (Cl. rv.): IX. 38 (s. trans. 



CL I.) : SFin XIX. 73 (normal), 75 (Cl. iv.). 

 Skeleton, cranial. See under cranial, neural and haemal 



arch, notochord, etc. 

 Snake, 37 (three headed?). 



Snout, 40-43 (in cyclopia) : 40-51 (in pug-head, etc.) : 62 (bifid). 

 Specific action of salts in the production of cyclopia, etc., 43. 

 Spinal cord, 14 (Cl. I.) : 17 (Cl. n.) : 18 (Cl. in.) : 19 (Cl. IV.): 



HO (Cl. v.) : SI (Cl. VI.) : 35 (hemididymus) : 39 (parallel 



union): 34 (triple monster): IV. 19-20, VI. 24-26 (s. 



trans, norm.): V. 21 (s. horiz. norm.): VI. 27-29, VII. 



30-31, XXVI. 114 (s. trans. Cls. iv.-vi.): VII. 32-34 



(triple monster): X. 39-40, XI. 41, XII. 43-46 (s. 



horiz. Cl. I.) : XV. 53, XVI. 55 (s. horiz. Cl. HI.) : Spc 



in XVIII. 69 (normal), 70(01. I.), 71 (Cl. n.): XXIII. 



97-99 (triple monster): XXVI. 113 (s. trans, absence of 



notochord). 



Spines. See under tubercles. 



Spinous processes of vertebrae in twisted body, 53 : absence 



of, in a vertebra, 53. 

 Spurious hermaphroditism, 46. 

 Stimulation, electrical, producing hemididymus, 26. See 



also under experimental. 

 Stomach, IB (Cl. in.) : 34 (triple monster) : 62 (hernia) : XII. 



46 (s. horiz, Cl. I.) : XXII. 95. XXIII. 98 (triple monster). 



See also under intestinal canal. 

 Structure of monstrosities. See under the various types 



described. 

 Supernumerary, barbels, 61 : eyes, 59 : fins, 54 : lateral line, 



62 : ovary, 62 : scales, 62. 

 Supraorbital cartilage or bar, 11 (normal): 13 (Cl. I.): 1G 



(Cl. II.): 41-42 (cyclopia): III. 13-16 (s. trans, norm.): 



V. 21 (s. horiz. norm.): VIII. 35-36, IX. 37 (s. trans. 



01. I.): X. 39-40, XII. 43-44 (s. horiz. Cl. I.): XIII. 47-48, 



XIV. 49-50 (s. trans. Cl. n.): s and s' in XVII. 57 



(normal), 59 (01. I.), 61 (01. 11.): XXI. 90-91 (diagrams) : 



XXV. 109-110 (semi-cyclopia). 

 Supra-regeneration, 36, 37, 55, 61. 

 Survival of monstrous fishes, 2, 43. 

 Swim-bladder. See under air-sac. 

 Sylvian aqueduct. See under Iter. 

 Symbolism and teratology, 1. 

 Synchronous hermaphroditism, 47. 

 Synostosis, of vertebrae, 51. 



Tables of classification in double monstrosity, 3, 4 ' in triple 



monstrosity, 38. See also under classification. 

 Tail bud in mesodidymus, 26. 

 Tail, 3G (in Petromyzon, trifid) : 37 (in Pelobates larva, do.) : 



37 (in lizards, do.): 3, 4, 20-23 (union by): 31, 52 



(abnormalities). See caudal. 

 Tatusia, xi, 5, 8, 38 (polyembryony in). 

 Teeth, 46 (blunted in male ray) : 62 (abnormal). 

 Tegminal cartilage, 11 (normal) : VIII. 35 (s. trans. 01. I.) : 



X. 39 (s. horiz. Cl. I.) : X in XVII. 57 (normal) : XXI. 



90-92 (diagrams) : XXV. 107-108 (cyclopia) : XXVI. 112 



(s. trans, atrophic head). 

 Telescopic eyes of goldfish, 63. 

 Testes in hermaphroditism, 47. 

 Trabeculae cranii, 11 (normal) : 13 (01. 1.) : 16 (01. n.) : 40-43 



(cyclopia) : 44 (semi-cyclopia) : 5,9 (supernumerary eye) : 



III. 13-16 (s. trans, norm.): VIII. -IX. 35-37 (s. trans. 



Cl. I.) : XI. 41-42 (s. horiz. 01. I.) : XIII. 47-48, XIV. 



49-50 (s. trans. Cl. n.) : 6 to d in XVII. 56 (normal), 58 



(Cl. I.), 60 (Cl. n.) : XXI. 88, 91 (diagrams) : XXV. 108, 



XXVI. Ill (semi-cyclopia). 



Transition, region of, from the double to single condition. 

 Sec under the various classes of anadidymus. 



Transmission, of abnormalities, see under hereditary. 



Tripartite division of embryonic axis, 36, 39. 



Triple monstrosity, 8 (general) : 33 (description of specimen) : 

 35 (other instances in fishes) : 36 (mode of origin in fishes 

 and other vertebrates) : 38 (classification) : VII. 32-34 

 (s. trans, tail). See also XXII., XXIII. 94-99. 



Trisomi, 38. 



Tropidonotus, S, 37 (three centres of segmentation). 



Truncus arteriosus, 14 (Cl. I.) : 17 (Cl. n.): IV. 17 (s. trans. 

 norm.): XIV. 51 (s. trans. Cl. n.): XVI. 54 (s. horiz. 

 Cl. in.) : TA in XVIII. 68 (Cl. n.). 



Tubercle, posterior, in mesodidymus, 25, 28. 



