. The Cambridge natural history. Zoology; Zoologia Geral. FK;. 50.—Ectosarc of Ciliata. n-f, from Stentor coeruleus; g, llfilnphfijn discolor, a, Transverse section, showing cilia, pellicle, canals, and inyonenies ; 6, surface view below pellicle, showing myonemes alternating with blue granular streaks ; c, more superficial view, showing rows of cilia adjacent to myonemes ; d, myoneme, highly magnified, showing longitudinal and transverse striation ; e, two rows of cilia ; f, g, optical sections of ectosarc, showing pellicle, alveolar layer (a), myonemes (m), and canals in ectosarc. (From Calk
. The Cambridge natural history. Zoology; Zoologia Geral. FK;. 50.—Ectosarc of Ciliata. n-f, from Stentor coeruleus; g, llfilnphfijn discolor, a, Transverse section, showing cilia, pellicle, canals, and inyonenies ; 6, surface view below pellicle, showing myonemes alternating with blue granular streaks ; c, more superficial view, showing rows of cilia adjacent to myonemes ; d, myoneme, highly magnified, showing longitudinal and transverse striation ; e, two rows of cilia ; f, g, optical sections of ectosarc, showing pellicle, alveolar layer (a), myonemes (m), and canals in ectosarc. (From Calkins, after Metschnikoff, Butschli, and Johnson.) so many owe their marked longitudinal striation on the one hand, and their power of sudden contraction on the other. The appearance of transverse striation may be either due to transverse myonemes, or produced by the folds into which the contraction of longitudinal fibrils habitually wrinkles the pellicles, when it is fairly dense (Peritrichaceae); circular muscular fibrils, however, undoubtedly exist in the peristoinial collar of this group. Embedded in the ectosarc are often found trichocysts,1 analogous 1 See Mitrophanow " Sur les Tnchocystes . . du Paramoecium," Ari'h. J'mtist. v. 1904, p. 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 Harmer, S. F. (Sidney Frederic), Sir, 1862-; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. [London, Macmillan and co. , limited; New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1906
