502 EYE FIELD OPERATIONS 



Schwind (1957) tas shown that heteroplastic eye grafts between three species of Eana 

 Invariably failed to develop. Eakin and Harris (19'+5) used the optic vesicle as a test 

 object in some xenoplastic transplantations between Urodele donors and Anuran hosts. 

 Grafts from Tri turns or Amblystoma donors to Ifyla hosts never survived for very long, and 

 were eventually destroyed, generally within a week. They state that "Incompatability be- 

 tween host and xenoplastic transplant is regarded as a humoral and cellular antagonism of 

 the host in response to alien substances which diffuse out of the graft into the body of 

 the host." 



That the eyes have not lost their power of adjustment has been demonstrated recently 

 by Stone and his co-workers (Stone & Ellison, 19^+5) by the exchanging of eyes between 

 adults salamanders of different species. There is apparently a regression of the morphol- 

 ogy and physiology of the eye and a recovery of both the normal structure and fxmction, 

 even in the adult eyes. 



BEFERMCES : 



Adelmann, H. B. , I956 - "The problem of cyclopia." Quart. Eev. Biol. Il:l6l & 28i^. 

 Adelmann, H. B. , 1957 - "Experimental studies on the development of the eye. IV. The ef- 

 fect of the partial and complete excision of the prechordal substrate on the develop- 

 ment of eyes of Amblystoma punctatum. " Jour. Exp. Zool. 75:199- 

 Alderman, A. L., I958 - "A factor influencing the bllaterality of the eye rudiment in 



^la regllla." Anat. Bee. 72:297. 

 Ballard, W. W., 1959 - "Mutual size regulation between eyeball and lens in Amblystoma, 



studied by means of heteroplastic transplantation." Jour. Exp. Zool. 8l:26l. 

 Harden, B. B., 19'<-5 - "Changes in the pigmentation of the iris in metamorphosing amphibian 



larvae." Jour, Exp. Zool. 92:171. 

 Detwiler, S. B., 1929 - "Some observations upon grafted eyes of frog larvae." Arch. f. 



Ent. mech. Il6:555. 

 Detwiler, S. B. , 19^^ - "Behavior of Amblystoma larvae lacking In forebraln, eyes, and 



nasal placodes." Proc. Soc. Exp. Biol. & Med. 56:195. 

 Detwiler, S. B. & W. M. CoperJiaver, 19'+2 - "Further experiments dealing with embryonic 



enucleation In Amblystoma." Proc. Soc. Exp. Biol. & Med. 51:53^' 

 Dinnean, F. L., 19'*-2 - "Lens regeneration from iris and its inhibition by lens reimplanta- 

 tion in Trlturus torosus larvae." Jour. Exp. Zool. 90:'+6l. 

 Dragomirov, W., 1955 - "Determination des Augenkeimes bei Amphlblen." Acad. Sci. d 



Ukraine, Trav. Inst. zool. et biol. 8:25 (see also 1955 Arch. f. Ent. mech. 129:522). 

 Filatow, D. , 1957 - "Uber die Linsenlnudzlerung nach Entfernung des Chorda-mesoderms bei 



Eana temporaria." Zool. Jarb. Abt. allg. Zool. u. Physiol. 58:1. 

 Greene, W. F. & H. Laurens, 1925 - "The effect of extirpation of the embryonic ear and eye 



on equilibration in Amblystoma punctatum." Am. Jour. Physiol. 64:120. 

 Hall, T. S., 191+2 - "The mode of action of lithium salts in amphibian development." Jour. 



Exp. Zool. 89:1. 

 Handford, S. W. , 19'+5 - "The relation of age and temperature to the relative growth of the 



eyes of Amblystoma." Jour. Exp. Zool. 98:127. 

 Harrison, B. G., I929 - "Correlations in the development and growth of the eye studied by 



means of heteroplastic transplantation." Arch. f. Ent. mech. 120:1. 

 Harrison, E, G. , I955 - "Some difficulties of the determination problem." Am. Nat. 



68:506. 

 Hewitt, D. C, 195^+ - "Xenoplastic transplantation of amphibian eye rudiments." Jour. 



Exp. Zool. 69:255. 

 Holtf rater, J., 1955 - "Uber das Verhalten von Anurenektoderm In Urodelenkeimes." Arch. 



f. Ent. mech. 155:^+27. 

 Kollros, J. J., 19'4-5 - "Experimental studies on the development of the corneal reflex in 



amphibia. III. The influence of the periphery upon the reflex center." Jour. Exp. 



Zool. 92:121. 

 Lehmann, F. E., 195^+ - "Die Llnsenblldung von Eana fusca in Ihrer Abhangigkeit von 



chemlschen Einflussen." Arch. f. Ent. mech. 151:555- 

 Leplat, G., I919 - "Action du milieu sur la developpement des larves d'amphlbiens. 



Localisation et differentiation des premiers ebauchee oculalres chez les vertebras. 



Cyclople et Anophthalmle." Arch, de Biol. 50:251. 

 Liedke, K. B. , I9U2 - "Lens competence In Eana plpiens."' Jour. Exp. Zool. 90:551. 



