. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 3GO EM ATHKLMIS TILES. Es layer of the integument lies a complicated system of canals, filled with a clear fluid containing granules. Beneath the internal layer of the integument, which layer is often very extensive and of a yellow colour, is placed the powerful muscular tunic; it is composed of external transverse and internal longitudinal fibres, and bounds the body cavity. Tiie complicated ramified system of dermal canals, of which two principal longitu- dinal trunks may be recog- nised,
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 3GO EM ATHKLMIS TILES. Es layer of the integument lies a complicated system of canals, filled with a clear fluid containing granules. Beneath the internal layer of the integument, which layer is often very extensive and of a yellow colour, is placed the powerful muscular tunic; it is composed of external transverse and internal longitudinal fibres, and bounds the body cavity. Tiie complicated ramified system of dermal canals, of which two principal longitu- dinal trunks may be recog- nised, is filled with juices, and probably functions as a nutritive apparatus. The portion of this system which extends into two bodies (the lemnisci, fig. 289, Le) project- ing behind the proboscis through the muscular tunic into the body cavity, probably acts as an excretory organ. since the contents of the fre- quently anastomising canals of these lemnisci is usually of a brown colour, and consists of a cellular mass rich in concretions. According to Schneider, the vessels of the lemnisci open into a circular vessel in the integument, and only communicate with the network of canals in the cephalic region, while the other dermal vessels (nutritive apparatus), the contents of Leuckart). which differs from that of the. •B. 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. London, Swan Sonnenschein & co.
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Keywords: ., book, bookcentury1800, bookcollectionbiodiversity, bookdecade1890
