68 



INDEX TO STRUCTURES AND SUBJECTS 



Rectus oculi, interims, 14 (CI. 1.) : 4U 4$ (cyclopia) : III. 13- 

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

 (s. trans. CI. 1.): XI. 41, 42, XII. 44 (s. horiz. CI. 1.): 



XIII. 48, XIV. 49 (s. trans. CI. 11.). 



Rectus oculi, superior, 14 (CI. I.): 41-4 ■• (cyclopia) : III. 14- 

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

 39-40, XI. 41-42, XII. 45-46 (s. horiz. CI. 1.) : XIII. 47-48, 



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

 XXV. 109-110 (seini-cyclopia). 



Reduplication, local, of notochord, 53 : IV. 20. 



Reptiles, 8, 89, 37 (double and multiple forms). See also 

 Lacerta, snake, Tropidonotus. 



Retina, 14 (CI. I. ): 41-4~ (cyclopia): 59 (supernumerary eye): 

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

 VIII. 36, IX. 37 (s. trans. CI. 1.) : X. 39, 40, XI. 41, 42, 

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

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



Reversed flatfish, 57, 58, 6?. 



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

 atavism. 



Rhythm, of respiration and circulation in anakatadidymus, 84. 



Round-head, 49-50. 



Rudiment, embryonic, 6, 10 (in double monstrosity) : 87 (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 aud tubercles on under side in ambicoloured flatfish, 57 : 



increased number, '..'. 

 Sea urchin, 47 (apparent protandry in). 

 Secondary fusion. See under fusion. 

 Segmentation, syncytial in Salmonidae, 5 ; more than one 



centre of, S, 37. 

 Segments, normal number, etc, /?. See also under muscle 



plates. 

 Semicircular canal, 17 (CI. 11.): 84 (triple monster): IV. 17 



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



horiz. CI. 1.): XIV. 49-51 (s. trans. CI. 11.): XV. 52-53 



(s. horiz. CI. 111.): ASc, PSc in XX. 82 (CI. n.): XXV. 



110 (semi-cyclopia). 

 Semi-cyclopia, 24 (in anakatadidymus) : 4'i (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 (CI. m.): SO (CI. rv.): IX. 38 (s. trans. 



CI. 1.): SFinXIX. 73 (normal), 75 (CI. IV.). 

 Skeleton, cranial. See under cranial, neural and haemal 



arch, notochord, etc. 

 Snake, 37 (three headed?). 



Snout, 40-43 (in cyclopia): 49-51 (in pug-head, etc.): ft? (bifid). 

 Specific action of salts in the production of cyclopia, etc., 48. 

 Spinal cord, U (CI. I.) : 17 (CI. 11.): «(Cl.m.): 19 (CI. iv.): 



20 (CI. v.) : 21 (CI. VI.) : 25 (hcmididymus) : 29 (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. CI. 1.): XV. 53, XVI. 55 (s. horiz. CI. in.): Spc 



in XVIII. 69 (normal), 70 (CI. I.), 71 (CI. 11.): XXIII. 



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



notochord). 



Spines. See under tubercles. 



Spiuous processes of vertebrae in twisted body, 52 : absence 



of, in a vertebra, 52. 

 Spurious hermaphroditism, 4G. 

 Stimulation, electrical, producing hemididymus, 20. See 



also under experimental. 

 Stomach, 19 (CI. in.) : 34 (triple monster) : 62 (hernia) : XII. 



46 (s. horiz, CI. 1.) : 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, 6! : scales, 62. 

 Supraorbital cartilage or bar, 11 (normal): 13 (CI. 1.): 16 



(CI. 11.): 41-42 (cyclopia): III. 13-16 (s. trans, norm.): 



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



CI. 1.): X. 39-40, XII. 43-44 (s. horiz. CI. 1.): XIII. 47-48, 



XIV. 49-50 (s. trans. CI. 11.): s and s in XVII. 57 



(normal), 59 (CI. 1.), 61 (CI. 11.) : XXI. 90-91 (diagrams) : 



XXV. 109-110 (semi-cyclopia). 

 Supra-regeneration, 36, 37, 55, 01. 

 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, 3S. See also under classification. 

 Tail bud in mesodidymus, 26. 

 Tail, 86 (in Tetromyzon, trifid) : 37 (in Pelobates larva, do.) : 



37 (in lizards, do.): 3, 4, 20-23 (union by): SI, 5$ 



(abnormalities). See caudal. 

 Tatusia, xi, 5, S, 3S (polyembryouy in). 

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

 Tegminal cartilage, 11 (normal): VIII. 35 (s. trans. CI. 1.) : 



X. 39 (s. horiz. CI. 1.) : A' in XVII. 57 (normal) : XXI. 



90-92 (diagrams) : XXV. 107-10S (cyclopia) : XXVI. 112 



(a. trans, atrophic head). 

 Telescopic eyes of goldfish, 62. 

 Testes in hermaphroditism, 4~- 

 Trabeculae cranii, 11 (normal) : 13 (CI. 1.) : 16 (CI. II.) : 40-43 



(cyclopia) : 44 (semi-cyclopia) : 59 (supernumerary eye) : 



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



CI. 1.): XI. 41-42 (s. horiz. CI. I.): XIII. 47-48, XIV. 



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



(CI. 1.), 60 (CI. 11.) : XXI. 88, 91 (diagrams) : XXV. 108, 



XXVI. Ill (semi-cyclopia). 



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

 See under the various classes of anadidymus. 



Transmission, of abnormalities, see under hereditary. 



Tripartite division of embryonic axis, 36, 39. 



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

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

 and other vertebrates) : 3S (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 (CI. I.) : 17 (CI. 11.) : IV. 17 (s. trans, 

 norm.): XIV. 51 (s. trans. CI. II.): XVI. 54 (s. hoiiz. 

 CI. in.) : TA in XVIII. 68 (CI. 11.). 



Tubercle, posterior, in mesodidymus, 85, .'>'. 



