. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. II r DBA 263 from a central one. This is the case, for example, in the bath- sponges. A small bath-sponge is composed of the skeleton of only a single individual, whereas the larger sponges may be com-. Fici. 253. — Stjcon gelatinosum. A portion slighth' nuignified : one c^'linder (that to the right) l:)isected longitudinaUy to show the central stomach- cavity opening on the exterior by the oseulum, and the position of the in- current and radial canals ; the former indicated by the Ijlacl: bands, the latter
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. II r DBA 263 from a central one. This is the case, for example, in the bath- sponges. A small bath-sponge is composed of the skeleton of only a single individual, whereas the larger sponges may be com-. Fici. 253. — Stjcon gelatinosum. A portion slighth' nuignified : one c^'linder (that to the right) l:)isected longitudinaUy to show the central stomach- cavity opening on the exterior by the oseulum, and the position of the in- current and radial canals ; the former indicated by the Ijlacl: bands, the latter dotted, ip. marks the position of three of the groups of inhalant pores at the outer ends of the incurrent canals ; o, oseulum. posed of half a dozen or more zooids, the number of which may be determined by counting the number of large openings in the sponge. The soft living matter may easily be removed from the skeleton, and this is regularly done in preparing the sponges used in commerce. Our common bath-sponges come from. 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 Davenport, Charles Benedict, 1866-1944; Davenport, Gertrude Anna Crotty, 1866- joint author. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1911
