A Manual of Marine Zoology for the British Isles Volume 1 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1855 Excerpt: ...body composed of twelve to thirty-five segments; all furnished with lateral pencils of bristles, but without hooks; inhabiting a membranous tube open at both ends. 0. Fabrioii. 0. Johnstoni. Fig. 147; mag.. Bairdii. amcena. Sabella (Linn.). Gills of many slender, finely pectinated rays, arching outwards, forming a funnel, often arranged spirally: body of numerous segments: inhabiting a tube usually leathery, closed and attached at the base. S. reniformis. infundibulum. vesiculosa. penicillus. carnea. rosea. bombyx. flosculus. Family IV. Serpulad.se. Serpula (Linn.). Body depressed, attenuated behina; segments numerous and close-set; gillthreads many, arranged in two fans. Tube calcareous, irregularly twisted, cemented to submarine bodies. Serpulad.e. 95 S. intricata. S. serrulata. vermicularis. filiformis. triquetra. rugosa. contortuplicata. Fig. 149; n. s. Cordineri. Spirorbis (Lamk.). As Serpula, but with only six gill-threads, which are pinnate, retractile and radiating. Tube coiled in a flat spiral, cemented to seaweeds and other submarine substances. Dextral. S. communis. Fig. 150; mag.. S. incurvatus. spirillum. pervius. granulatus. retortus. carinatus. annulus. corrugatus. heterocliticus. Montagui. tstriatulus. Sinistral. S. heterostrophus. S. lucidus. minutus. reversus. conicus. Filograna (Berkeley). As Serpula, but with only eight gill-threads, of which two bear a funnelshaped obliquely-truncateoperculum. Tube slender, thread-like, crowded into an irregular mass. F. implexa. Fig. 151; n. s. Ditrupa (Berkl.). Gills of twenty-two threads in two sets, not rolled spirally, singly pinnate. Tube free, open at both ends. D. subulata. Fig. 152; mag. f. Tribe II. Mesobranchia. Trunk with no gills, distinct head, eyes, antennae, or jaws Terricolana. Trunk wi...