. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. LOBED i??my.â'i:âmpi gnindis. KEYKOI-K-UHClllN.â'/;iioi|.e suhchnisa. 'd/Wn nimpMi ""â i^ wpf lisk -svliicli will ropiv>cnt tlio f;irc of tlie clock, tiimn which arc traced certain lines tli answer to tl at luuiils aim liniircs. IJy rapid decrees, the disk expands and covers tin- gelatinous sul)stance of tlu; animal, and puts on hour by hour more of the Ecliimis ns it loses its former skeleton sha]ic. The latter becomes
. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. LOBED i??my.â'i:âmpi gnindis. KEYKOI-K-UHClllN.â'/;iioi|.e suhchnisa. 'd/Wn nimpMi ""â i^ wpf lisk -svliicli will ropiv>cnt tlio f;irc of tlie clock, tiimn which arc traced certain lines tli answer to tl at luuiils aim liniircs. IJy rapid decrees, the disk expands and covers tin- gelatinous sul)stance of tlu; animal, and puts on hour by hour more of the Ecliimis ns it loses its former skeleton sha]ic. The latter becomes rapidly covered l)y and absorlied into the former, and in due tinu; the framework of long sleialer^'ods, which '^dit also be avcII compared to an artist's casid, or the trijiod stand of a theodolite, is converted into the well-known globular Echinus, with all its complicated apparatus of spines, pedicilliuia', and walking organs. The reader may perhaps have noticeil, that on inspecting a common Echinus, especially from the interior, it exhiliits in a very distinct uianner its close alliance with the well- known star-lishes. Take, for example, a common live-tinger star-fish out of tlie water, lay it on its back, an(l then gather all the live ]ioints together. Xow, supposing tlk- creature to be ], strip the skin from the , leaving it only adherent down the centre, join the edges of the .sti'ips, and there; is a very good in'iitatiou'of the yea-urchin. TllK two curious specimens represented in this illustration also belong to the Shielil- urchins. The , so called l)ecause of its wheel-like shape, is nearly as ''at as a piece nf money, and has a very slight elevation in the centre. It is remarkable for tlu; verv dtvp teeth into which one side; of the disk is cut, giving the creature an as]iect as if it were a cog-wheel in ]. of manufactuiv. Tlic colour of this species is most 1 v slate above, and dull white Ijelow. The under surface is veined
Size: 1801px × 1387px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectmollusks
