. An introduction to zoology, with directions for practical work (invertebrates). ECHINODERMA TA 61 which prevents it from being confused with the smaller, stiff starfish, Henricia, which is almost equally common. All these Starfishes live on the sea-floor, Dorsal Sulfas crawling over the rocks and sand amongst the seaweed. In essential structure all starfishes are very similar. The body consists of a central disc-like portion with five radiating arms, which are all alike both in. Fig. 30.âAsterias miens (life-size). Dorsal view: one arm is raised to show the tube-feet, tf, on the ventral surf
. An introduction to zoology, with directions for practical work (invertebrates). ECHINODERMA TA 61 which prevents it from being confused with the smaller, stiff starfish, Henricia, which is almost equally common. All these Starfishes live on the sea-floor, Dorsal Sulfas crawling over the rocks and sand amongst the seaweed. In essential structure all starfishes are very similar. The body consists of a central disc-like portion with five radiating arms, which are all alike both in. Fig. 30.âAsterias miens (life-size). Dorsal view: one arm is raised to show the tube-feet, tf, on the ventral surface ; â md, madreporite. external and internal structure, and all of which are equally capable of moving forwards and dragging the rest of the body after them. The surface of the body feels rough to the touch, for in the body-wall are embedded very numerous small calcareous plates or "ossicles," which protect the body and yet do not impede its motion, as they can move freely one on another. Many of these plates bear small simple spines, and amongst these may be seen small pincer-like bodies mounted on short stalks; these are known as "pedicellariae" ( 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 Lulham, Rosalie Blanche Jermaine. London, Macmillan
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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1913
