. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. A ;iH ?*??; V. Micropyle of the ovum of Lepidoptera. (From Leuckart,) c A. Side view of the upper part of the ovum o Sphinx Populi, showing the micropyle, the radiated markings surrounding it, and the cellular and other structure of the coverings of the ovum. B. More enlarged and direct view of the vicinity of the micropyle in the same. The dotted or punc- tated structure belonging to the chorion is here re- presented. eighty species. This must furnish ample proof of the universality of the existence of the micropyle in
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. A ;iH ?*??; V. Micropyle of the ovum of Lepidoptera. (From Leuckart,) c A. Side view of the upper part of the ovum o Sphinx Populi, showing the micropyle, the radiated markings surrounding it, and the cellular and other structure of the coverings of the ovum. B. More enlarged and direct view of the vicinity of the micropyle in the same. The dotted or punc- tated structure belonging to the chorion is here re- presented. eighty species. This must furnish ample proof of the universality of the existence of the micropyle in this class of animals, when we consider the minuteness of the object and the difficulty of obtaining specimens in a con- dition suitable for the investigation. Leuckart has stated, indeed, that in all instances in which the ova were ripe and favourable for examina- tion, he was enabled to assure himself of the presence of this apparatus. In a certain number of instances, amounting to about a dozen, Leuckart farther found that the spermatozoa adhere to the micropyle, and that a certain number of them pass into the ovum by this aperture. He observed that a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Todd, Robert Bentley, 1809-1860. London, Sherwood, Gilbert, and Piper
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