. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. ARACHNIDA. 205 Fig. gins of which adhere to the horny circle or peritrema of the stigma before described. We here subjoin figures copied from those of Professor Mu'ller of Berlin, which represent these parts in a scorpion. Fig. 86. an infinite num- ber of small holes, between which in the centre we may remark a larger circular plate (6.) Each little aperture is as it were stellated at the margins (r,) by which the air penetrates the body and gets into the t tracheae. These tracheae are ana- logous in struc- ture and
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. ARACHNIDA. 205 Fig. gins of which adhere to the horny circle or peritrema of the stigma before described. We here subjoin figures copied from those of Professor Mu'ller of Berlin, which represent these parts in a scorpion. Fig. 86. an infinite num- ber of small holes, between which in the centre we may remark a larger circular plate (6.) Each little aperture is as it were stellated at the margins (r,) by which the air penetrates the body and gets into the t tracheae. These tracheae are ana- logous in struc- ture and posi- tion to those of in sects; they are elastic, ramify after the man- ner of vessels in the interior of the body, and penetrate to even the minutest organs. With regard to the internal respiratory organs of the Pulmonary Arachnidans they have a very different character; presenting the ap- pearance of membranous sacs formed by la- mellse applied to one another like the leaves of a book, each of these little receptacles opens into a common cavity, the membranous mar-. 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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