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Processus falciformis, membranosus, niger, erectus, tenuis, retinam findens ex insertionis loco excurrit, versus lentis partem inferiorem.
Lens 7 ) magna perfecte globosa, tertia sui parte e pupilla prominens, corneae ipsius centrum tangit, ante aqueo humore perpauco circumfusa. Vitreum corpus pro pisce satis magnum, uveae vel coronae potius ciliari adhaeret et mediante nigro pigmento quasi agglutinatur.
7) I discovered that the spherical nucleus of the cristalline lens of the Cod, which in specific gvavity is to water neatly as 6-5 and to commonwhite glafs as 3 only to 10, collects the light so much more powerfully than water or glafs does, that its focus is not more than one sixth part of its diameter distant from its sur- face”. Alex. Monro , on the Eye. Edinh. 1797. p. 88.
Acipenseris Sturionis oculus.
Sturionis ultra trecentas libras pondere aequantis oculus, diametro maxima vix pollicem emetiens ob sclerotices insignem crassitiem cavitatem parvam dumtaxat includit, aeque ac oculus Balaenae.
Bulbus enim in adipe atque cellusosa stipata permulta latens, pyrifor- mis quasi apparet.
Sclerotica 8 ) catinum firmum in fundo duas lineas crassum, margine acutum faciens, imprimis cartilagine constat, elastica, pellucida, scutellis duabus osseis semilunaribus supra et infra in limbo anteriori positis, annulo osseo avium et amphibiorum analogis firmata, vasculis nonnullis ciliaribus perforata. Externe obducitur haec cartilago membrana alba, fibrosa, mammalium scleroticae simili, e nervi vagina oriente canalemque amplum obturante, quo nervus opticus ad oculum pervenit 9 ).
Cornea parva horizontal iter oblonga, perparum convexa, tenuior in centro, crassior versus marginem qua scutellis osseis sclerotices inhaeret et cuti crassae fuscae, quae partem bulbi anteriorem tanquam conjunctiva obducit.
8) Pvosenthal Zergliederung des Fischauges, in Reils Archiv B. 10. St. ITT. p. 393 seqq. Tab. VII. fig. 3-6 Sturionis oculum exhibent. In'fig. 3. praesertim squamulae osseae cernuntur, quae in sectione horizontali nostra apparere non potuerunt.
p) CnviER. Anat. comp. T. II. p. 388.