. Elementary text-book of zoology [electronic resource]. Zoology. BLATTA. 223 bread. The body, like that of the Norway lobster, is piano- symmetric, and is encased in a hard exoskeleton This Integu- consists of a chitinous cuticle secreted by the ectoderm, but it differs from that of the lobster in the absence of calcareous matter. Hence the exo- skeleton is tough and somewhat flexible, but not nearly so hard and thick as that of the latter. We can still Fig. 146.—The Common Cockroach (Blatta orientalis). Natural A, Male with the wings of left side expanded. B, Female with vestigial win
. Elementary text-book of zoology [electronic resource]. Zoology. BLATTA. 223 bread. The body, like that of the Norway lobster, is piano- symmetric, and is encased in a hard exoskeleton This Integu- consists of a chitinous cuticle secreted by the ectoderm, but it differs from that of the lobster in the absence of calcareous matter. Hence the exo- skeleton is tough and somewhat flexible, but not nearly so hard and thick as that of the latter. We can still Fig. 146.—The Common Cockroach (Blatta orientalis). Natural A, Male with the wings of left side expanded. B, Female with vestigial wings. C, Wingless young. All are seen from the dorsal aspect. distinguish chitinous sclerites united by softer arthrodial mertibranes. The body is divided into three parts, the head^ the thorax^ and the abdo7ne?i. Of these the head is not segmented, the External ^^^^^^ partially so, but the abdomen is as Features ^^^^^^Y segmented as in the lobster. The head bears one pair of long antennce at the anterior end, and close to them is a pair of compound eyes, not. 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 Masterman, Arthur Thomas; Parsons, John Herbert, Sir, 1868-1957, donor; S. H. Lazarus (Firm); University College, London. Library Services. Edinburgh : E. & S. Livingstone
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1901
