. The Cambridge natural history. Zoology. 424 CTENOPHORA a short blind canal, which terminates in an ampulla bearing two statoliths supported by elastic processes from the ampullar epithelium. The sub-umbrellar cavity extends for a distance of about one- half the height of the bell. The mouth (i/), which opens into this cavity, leads into a wide cavity that gives off a short blind canal to the side of each tentacular sheath, and a straight tube that leads straight to the statocyst, where it also ends Fig. 184.—Uydroctena ah, Aboral organ ; M, manubrium ; t, tentacle ; F, velum. (Afte
. The Cambridge natural history. Zoology. 424 CTENOPHORA a short blind canal, which terminates in an ampulla bearing two statoliths supported by elastic processes from the ampullar epithelium. The sub-umbrellar cavity extends for a distance of about one- half the height of the bell. The mouth (i/), which opens into this cavity, leads into a wide cavity that gives off a short blind canal to the side of each tentacular sheath, and a straight tube that leads straight to the statocyst, where it also ends Fig. 184.—Uydroctena ah, Aboral organ ; M, manubrium ; t, tentacle ; F, velum. (After Dawydoff.) There are no radial canals and no ring canal at the margin of the umbrella. There are also no ctenophoral plates. In the absence of any information concerning the position of the genital glands, the character of the epithelium of the tentacles and the development, we are not justified in regarding Hydroctena either as a Ctenophore or as a connecting link between the Cteno- phora and the Hydromedusae. It may be regarded simply as a Craspedote Medusa, probably related to the Narcomedusae, with a remarkable aberrant aboral 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- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
