| Reference number | PP/7/9 |
| Previous numbers | PP/39/12 |
| Level | Item |
| Title | Paper, 'On the fertilised ovum and formation of the layers of the South African peripatus' by Adam Sedgwick |
| Date | 1885 |
| Description | Sedgwick writes: 'The fertilised ovum of Peripatus capensis contains a central cavity traversed by a few strands of protoplasm. The protoplasm has a reticular or spongy structure, the reticulum being very close round the nucleus and much looser elsewhere. The strands of the reticulum are composed of an apparently perfectly homogeneous protoplasm. The nucleus is placed on one side of the ovum; it is a large body which varies very considerably in shape and structure in different ova. These variations no doubt represent different phases in the life-history of the nucleus. It has been impossible for me with the small number (ten) of unsegmented ova at my disposal to determine their sequence.'
Annotations in pencil and ink.
Subject: Morphology / Reproduction
Received 18 October 1885. Read 26 November 1885. Communicated by Michael Foster.
A version of this paper was published in volume 39 of the Proceedings of the Royal Society as 'On the fertilised ovum and formation of the layers of the South African peripatus'. |
| Extent | 21p |
| Format | Manuscript |
| Physical description | Ink and graphite pencil on paper |
| Digital images | View item on Science in the Making |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA6841 | Sedgwick; Adam (1854 - 1913) | 1854 - 1913 |
| NA8220 | Foster; Sir; Michael (1836 - 1907); physiologist | 1836 - 1907 |