 | Royal Microscopical Society (Great Britain) - 1899 - عدد الصفحات: 806
...— Dr. A. Willey suggests a theory of gill-slits according to which these arose in the interanuular depressions, while the gonads were disposed in zones...annulations. The primary function of the gill-slits was the ozygenation of the gonads, their secondary function being the respiration of the individual. In most... | |
 | 1900 - عدد الصفحات: 1016
...disposition and the gill slits occupying the interzonal depressions. The primary function of the gill slits was the oxygenation of the gonads, their secondary...function being the respiration of the individual." In support of this contention that in the lower Chordata the series of gonads once extended much further... | |
 | 1900 - عدد الصفحات: 558
...disposition and the gill slits occupying the interzonal depressions. The primary function of the gill slits was the oxygenation of the gonads, their secondary...function being the respiration of the individual." In support of this contention that in the lower Chordata the series of gonads once extended much further... | |
 | Royal Microscopical Society (Great Britain) - 1899 - عدد الصفحات: 810
...corresponding with the epidermal annulations. The primary function of the gill-slits was the oxygénation of the gonads, their secondary function being the respiration of the individual. In most cases the gonade have been secondarily emancipated from the gill-clefts in correlation with the * Zool. Anzeig.,... | |
 | 1899 - عدد الصفحات: 530
...distribution, the gonads having a zonary disposition and the gill-slits occupying the interzonal depressions. The primary function of the gill-slits was the oxygenation...secondary function being the respiration of the individual — the change of function having taken place pari passu with an elaboration of the vascular system.... | |
 | Sir Norman Lockyer - 1899 - عدد الصفحات: 672
...gonads are more or less coextensive with the gill-clefts, both being primarily unlimited in number. A theory of gill-slits was developed, according to...was the oxygenation of the gonads, their secondary functions being the respiration of the individual. In most cases the gonads have been secondarily emancipated... | |
 | Sir Norman Lockyer - 1899 - عدد الصفحات: 676
...gonads are more or less coextensive with the gill-clefts, both being primarily unlimited in number. A theory of gill-slits was developed, according to...annulations. The primary function of the gill-slits was the oxygénation of the gonads, their secondary functions being the respiration of the individual. In mosteases... | |
 | Sir Norman Lockyer - 1899 - عدد الصفحات: 788
...gonads are more or less coextensive with the gill-clefts, both being primarily unlimited in number. A theory of gill-slits was developed, according to...while the gonads were disposed in zones corresponding »ith [he epidermal annulations. The primary function of the gill-slits was the oxygénation of the... | |
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... Ptychoderidae, which are enlargements of the annulations ; and by the dermal pits of Spengelia, which are intergonadial depressions of the interannular grooves. In the Enteropneusta and in the Cephalochorda the gonads are more or less coextensive... 