File:Transactions and proceedings of the New Zealand Institute (1871) (14729360236).jpg

Identifier: transactionsproc41871newz (find matches)
Title: Transactions and proceedings of the New Zealand Institute
Year: 1868 (1860s)
Authors: New Zealand Institute (Wellington, N.Z
Subjects: Science Birds
Publisher: Wellington : J. Hughes, Printer
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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n inch in length. (PI. IX., Fig. 1). Onsooie fragments the markings were all straight, in others they were nearly allcurved, while in others again both straight and curved markings occurredtogether. Round dots were on all the specimens. In appearance they ai-emore like the egg of the South American Hhea than any other that I know.The specific gravity I foimd to be 2-714. On dissolving in dilute hydrochloricacid no residue was left. The shell is about 0-07 of an inch in thickness, andis divided into two layers, each presenting a different stracture (Fig. 2). The outer layer (Fig. 2 a) forms about two thirds of the whole thickness, andis composed of a large number of thin laminae, arranged parallel to the surfaceof the egg. Each of these laminse appears to be void of structure when viewedunder a power of 400 diameters, being made up of numerous points variouslyaggregated together into clouds (Fig. 3), very similar in appearance to mixcilage. TRANS.N.Z.INSTITUTE,Vo-L.I\^Pl.)X naJb. sirze
Text Appearing After Image:
7&?ilnz^l view. (afber Jd.JoTie^.) HuTTON.—On the Lizards of New Zealand. 167 The inside layer is totally different, showing an irregular columnar structure,which very easily breaks up (Fig. 2 b). Sections made parallel to the surfaceof the egg, or at light angles to the columns, show that each column containsmany, more or less complete, triangular prisms of carbonate of lime. Under alow power these prisms appear to have a radiating arrangement from a nucleus,and often there are two, three, or four nuclei in each column (Fig. 4), butvinder a higher power this disappears. This appearance is owing to the piismsbeing collected more thickly in the centre of the column, and to many of theimperfectly formed ones having a well formed apex pointing inwards, whilethe base of the triangle is undefined, and shades off outwards into a brush ofvery fine spiculse (Fig. .5). The prisms appear to be always triangular, and to vary in section from anequilateral to an isosceles triangle, in which

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