Summary
The structure of the nidamental glands ofG. tigrinus, M. nieuhofii,S. blochii andP. micrura is described.
Spermatozoa have been observed in the shell-secreting tubules of the nidamental giand ofG. tigrinus.
‘Tufts’ which are characteristic of the lamellæ of other nidamental glands, are absent in the ‘lamellæ’ of the shell-secreting region of the nidamental gland ofM. nieuhofii. No remnant of egg-case is seen in the uterus and it is suggested that owing to the absence of the ‘tufts’ and the simple structure of the ‘lamella’ probably no egg-case is formed in this species.
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References
Couch, J. “On the egg-purse and the embryo of a species ofMyliobatus,”Kept. Brit. Assoc. Adv. Sci., 16th Meet., 1847, 80.
Nalini, K.P. “Observations on the structure and function of the nidamental gland ofChiloscyllium griseum (Mull. & Henle) with a note on the formation of the egg-capsule,”Proc. Ind. Acad. Sci., 1940,12, 189–214.
Prasad, R. R. “The structure, phylogenetic significance and function of the nidamental glands of some elasmobranchs of the Madras Coast,”Proc. Nat. Inst. Sci. India, 1945 (In press).
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Communicated by Dr. N. Kesava Panikkar, f.a.sc.
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Prasad, R.R. Further observations on the structure and function of the nidamental glands of a few elasmobranchs of the Madras Coast. Proc. Indian Acad. Sci. 22, 368–373 (1945). https://doi.org/10.1007/BF03049914
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DOI: https://doi.org/10.1007/BF03049914