340 



MOLLUSCA. 



SLirfiire, .mil as it has been even asserterl that ilie ^cvm of this lihcll has I)Ocn seen in the rcr^ of tlie 

 ArgiiDaui ■'', we must s;iy that this opininn is, lo say the most of it, still very jiroijIeinatical.^Pnli, 

 7V'.v/«c. Xviij). iii. ]•- ]0. See also lu^russac, i\fein. df la Soc. d'JIisf. Na(. de Park, ii, p. 100; and 

 Kanzani, hlem. di Sfor. Nat. Lee. i. p. 85. It is the NaulUuv and Poiajjilns of the ancients. — Plin. ix. c. 29. 



We know some species, very like each other botli in the animal juhI ^lll•ll, wliicli Linnaeus confounded together 

 under the name of Argoitaii/a or(/o, vulg'arly called the Paper-nanlihis;. 



It is supposed that we must ascribe to an animal analoi^ous to tin Ar2:oii;uit, tlie Bi-U<Tophoii,—fiy>.^[\ slidls 

 rolled up spirally and symmetrically, and without septa; but thiL'k, not ^n-ou\e(h and \shose last \^ll0^1 is propor- 

 tiMii:ibly shorter. [Soweiby says that licllerojilion is the only fossil that bears any real resemblance to Argonauta, 

 but neither shell, in his opinion, has been formed by a Cephalnpodous animal, but probably hy one nearly like 

 that of Carinaria. The fossils are characteristic of the cartxmilVrous limestone, and the oldest secondary strata : 

 in these the shell is frequently found changed to silex.] 



Tiic Sr,Kii"\'ic-Fisn {Lolifjo, Lam.) — 

 Have in the hack, instead of a shell, a liDrny lamina in tlie sliape of a sword or lancet. Their sac has 

 two lins ; and hrsiides the eit^lit fret, furni\hed witli small pcdirlrd iuckers innrdiiiatcly ari'anged, their 

 head snppoils t\\(.) ai'ins much longer than the feet, ami only aeelihnlerrrous near the ends, which are 

 enlarged. These the animal ein})loys as anchors to fix itself. Their ink-hag is buried in the liver ; 

 ami the glands nf their n\idnets arc very large. They lay their eggs attached together in straight 

 garlands, ;ind in two series ; [and the entire mass somewhat rcseirihles a mop, being coni[)Osed of 

 nnmerous intestine-like lilamcnts tied together in the centre]. 



The fandly is now subdivided from the number and armature of tlie feet, and tlie f(irm cif the tins. T!ie Lul'i- 

 gopsiSy like the <')ctopus, has only eight feet, but our knowledge of the genus lesfs upon figures that are scarcely 

 ti-ustwnrthy f In Loiujo propeiiy so called, the arms have suckers as well as the feet, and the tins are situated 

 towards the end of the sac. AA'e have tliree species in our seas, — the L. vul<ifiri.s iSej'in loli<jo, Linn.) ; L. siniittala^ 

 and L. subulaf a y or ^epia media, Linn. The Omjchotlifuthis, bn-!n.-n-.t, (C///////';, Lcsueur,) have the form of the 

 L'jligo, but the suckers of their arms end in hooked spines. The Se/nijt<i ha\e roumh'd fins, attached, not to the 

 cud, but to the sides of tlie sac. The common Sepiola {Sepia sepiula, Linn.) occurs in our seas. The body is short 

 and obtuse, with small circular fins. It never exceeds three incliesin length ; and its horny lamina is slender and 

 ]ioiiited like a needle. ± The Scpiolheutes, Blainv. (C/io«(^'o*(V)/a, Leukard,) luive the s:ic margined througliout 

 with the fins, as in the .-'epia ; but their shell is horny, as in the Loiigo. 



Thi': Cuttle-fisk, strictly so called (Sej)ia, Lam.), — 

 Possess the tw"0 long arms of Loiigo, and a fle^,hy fm stretched along eaeli side of tlieir sac. Tbenr 

 shell is oval, thick, tumid, and composed of an inlinity of very thin parallel calcareous lamin;c, joined 

 together by thousands of little hollow columns, whieli are placed upright in the spaces between every 

 two lamime. This structure rruders it frial)le, whence it is employed by artists in polishing various 

 works ; and it is given to cage binls to sharpen their beaks upmi. Tluj Se[)ia have the ink-bag separate 

 from the liver, and situated deciier in the alfdiunen. The glands nf tite oviducts arc enormously large. 

 Tliey deposit their eggs attached to one aiiutlier in branched clusters, not 

 unlike acluster of grapes, whence the vulgar have called thetu Sca-r/rapes. 



The species distributed in all our seas {Scj)iii officina!i.s, Linn.) reaches a foot or 

 more in length. Its skin is smooth, whitish, and dotted with red. In the Indian 

 Occau there is one with a skin roughened with UxhttvcM-a (S. (iiherciila(a,'h?i\\).). 



(Aiimiig fiissils we find sotik- liltic bodies armed with a spine, \^luch nrr the 

 cuds 01' a bime of Sepia?. They cimstitute the genus Bfl'-i'frrn nf Doluiyes. 8ee 

 Ann. ill's. Sr. Xdi. ii. XX. 1,'2. Sni lie other fossils, but petrified, appear to liave great 

 relai iiMi til Mirbcaksi.f (lie Se|ii,c. These are W\Q Riiiicholilliesoi iSL Faure Biguet. 

 —See Gadlardot, Ann. Sv. Nal. ii. 48.5, and pi. xxii. ; and U'Orbigny, ib. pi. vi.) 



Linna;us united in one geims — jiij 



N.vuTir.us — 

 All spirally twisted, symmetrical, and chambered shells, — that is to say, 

 several cavities; and he sujiposed them to be inhabited by Cephalopods. One of tbein is, in fact, the 

 shell of a Cephalopod, very similar to a Sepia, but with shorter arms: it is the genus 



Si'iRULA, Lam. — 

 [u the hinder part of tlie bodv of the Cutlle is an interior shell, which, however dissimilar to the 

 Inme of llie Sepia in figure, ilnes tint differ much from it in the manner of its formalion. If we imagine 



divided hy partitions into 



iliL-ir 1,'rciil Iciigih uiid gr 



ve been disproved. — K 

 rlnidL'd to hnvc two .1 



r<nt. ZihA. n. s. iii. p. 33i). &e.— Ku. 

 Ill tlie anatomy of SepioU find L,.lii:n|ii, 

 iij [lie Isl vol. of the Z-ol. Truus.— V.i,. 



