. Dangerous marine animals. Marine animals. 50 DANGEROUS MARINE ANIMALS Venom Apparatus of Sea Urchins. The venom apparatus of sea urchins is believed to consist of their hollow venom-filled spines, and the globiferous pedicellariae. However, usually only one or the other is present within a single species of sea ;. Fig. 23. Top: Black long-spined sea urchin, Diadema setosum (Leske). Bottom left: Sea Urchin, Toxopneustes elegans Doderlein. Bottom right: Sea Urchin, Asthenosoma ijimai Yoshiwara. Part of the outer covering has been removed to show the test beneath. (Kreuzinger) Spine
. Dangerous marine animals. Marine animals. 50 DANGEROUS MARINE ANIMALS Venom Apparatus of Sea Urchins. The venom apparatus of sea urchins is believed to consist of their hollow venom-filled spines, and the globiferous pedicellariae. However, usually only one or the other is present within a single species of sea ;. Fig. 23. Top: Black long-spined sea urchin, Diadema setosum (Leske). Bottom left: Sea Urchin, Toxopneustes elegans Doderlein. Bottom right: Sea Urchin, Asthenosoma ijimai Yoshiwara. Part of the outer covering has been removed to show the test beneath. (Kreuzinger) Spines. The spines of sea urchins vary greatly from group to group. In most instances the spines are solid, have blunt, rounded tips, and do not constitute a venom organ. However, some species have long, slender, hollow, sharp spines, which are extremely dan- gerous to handle. The acute tips and the spinules permit ready entrance of the spines deep into the flesh, but because of their ex- treme brittleness, they break off readily in the wound and are very difficult to withdraw. The spines in Diadema may attain a length. 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 Halstead, Bruce W. Cambridge, Md. , Cornell Maritime Press
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectmarineanimals
