. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. ' YELLOW hX'—Terchrntula (Opon shell on riglit.) PAKROT-BILL LAMP-SHELL.—iIAyiic/iOHc!;ii piitlacea. SNAKE-IIEAD LAMP-SHELL.—TcrcIirdtoJa caput strptntia. OOOSEBILL.—Linjruto anallm. Our last example of the Pteropoda is the Cymbulia, the large-winged animal placed above the spike-shell. Though greatly resembling the carinaria in general appearance, it is divided from that creature by many important structural
. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. ' YELLOW hX'—Terchrntula (Opon shell on riglit.) PAKROT-BILL LAMP-SHELL.—iIAyiic/iOHc!;ii piitlacea. SNAKE-IIEAD LAMP-SHELL.—TcrcIirdtoJa caput strptntia. OOOSEBILL.—Linjruto anallm. Our last example of the Pteropoda is the Cymbulia, the large-winged animal placed above the spike-shell. Though greatly resembling the carinaria in general appearance, it is divided from that creature by many important structural differences. Its shell is , and in and transluconcy somewhat like the glass-slipper of fairy mythology, the point, or toe, being set forward. Only three species of this genus are known. As group after group of molluscs passes before our notice, each seems to be more extraordinary than its predecessor, and to present us with stranger and more unexpected forms. The molluscs of the next group are the first of the bivalves, but stand alone in many particulars, and evidently form a transition between the gasteropoda and the ordinary bivalves. They are all inhabitants of the sea, and, when adult, are found attaclied to , coral l)ranches, and even other shells ; but in their earlier stages are apparently able to s>vim freely tlirough the water, as is the case with many other moUuscs. In the ordinary bivalves, the two shells correspond with the right and left side of the animal; but in the Brachiopoda, as these creatures are called, the one covers the upper and the other the lower portion, and ar,' called accordingly the dorsal and ventral valves. Of these, the former is snmller than its companion, to which it is jointed by means of certain interior sockets, which receive corresponding hooks in the ventral valve, and lock them together so tightly, that they cannot be separated without something being broken. The ventral valve is large, and is marked by
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Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectmollusks
