. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. Till': IIEART-UUeillN. 725 Kcliimjs can soizo its prey with any nl' its ambuhicra, no ' on what portion of the iKitiy they may be sitimtod, and pass it from one to the otlier until it reaches the moutli :ifiiiii |iPrP"'B!i. ^-',.-;//"'. rH'Kli L'UCillX.—ti(/((MS jHiinlliihi. appearance ect is very in onlei', In arc sure tn ;, as , and are especially common in the chalk formations. On the upper right-hand side I'f the illustrati
. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. Till': IIEART-UUeillN. 725 Kcliimjs can soizo its prey with any nl' its ambuhicra, no ' on what portion of the iKitiy they may be sitimtod, and pass it from one to the otlier until it reaches the moutli :ifiiiii |iPrP"'B!i. ^-',.-;//"'. rH'Kli L'UCillX.—ti(/((MS jHiinlliihi. appearance ect is very in onlei', In arc sure tn ;, as , and are especially common in the chalk formations. On the upper right-hand side I'f the illustration is .seen the handsome ruiM' IIkaut-uucuix in a perfect .rtate, with all its array of slender armed spines ; while, on the other side, is a specimen of the Common lli;.\i!T-UKciiix with its spin(>s removed, showing well its peculiar shape. The_shell of this geims is .slight and delicate, and is conqicsed of very large plates, wliieli, in conse(pience, are comi)uratively few in number. There is always a furrow nf greater or less tle])th at the upper end. In the naked specimen the rows of pores tlirough which the andmlacra pass are plainly perceptible, and even in the fossilized ^liceinicus, which have lieen buried in the earth for .so many ages, these pores are still visible, and .so plainly marked, that the genus and species of the dead shell can be made I'll! with little less ease thiui if the animal were just taken out of the water. The Heart-urchins are found in all ])arts of the world, and our own seas contain siK'cimens of these carious In the ]\lediterrancan they are extremely plentiful, and iiiiistly a])pear to live below the sand. They seem to feed on the animal tli;it are mingled with the sand, for M. de Itlaiuville founel, on di,sscctiug many sjiecimens, tliat their digestive organs were always tilled with fine sand. The walls of the digestive cavities are exceedingly delicate, and have been compared to the spider's web. in the lower lef
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Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectmollusks
