MOLLUSC A. 617 



Jstiopliorus plaliiptcnis. — The Eioad.FiiiiRMi Swoid-Fisli. I'lato Ixi. fig-. 

 8. Described, vol. iii. p. 530. 



Coi-yphccna Hippuris. — The Common ('ory|ilia>uii. Plate Ixi. fij,'. '.\ 

 Of a vivid .silvery hue, with yellow spots; fiiis rich yellow; tail forked. 

 Four feet long. Inhabits the Mediterranean. 



Platax Teira.—Tha Lon^'-Finned Ch.X'todon. Plate Ixi. tier. 10. Sil- 

 very white, with three black bands ; dor.sal and anal tins extremely long and 

 arcuated ; ventral fins black. Inhabits the seas of Arabia and India. 



Equiis Americanus. — The Kuig-ht Fish. Plate Ivi. fig. 9. Back brown ; 

 sides and abdomen yellow ; three oblique black bands ; a narrow one pass- 

 ing over the eyes, the second one, which is greatly broader, commences on the 

 crown and terminates under the throat; the third on the dorsal fin, and is 

 continued to the tip of the caudal fin. Twelve inches long. Inhabits the 

 American seas. 



Aulostomus Chinensis. — The Chinese Gar-Fish. Plate Ivi. fig. 2. De. 

 scribed, vol. iii. p. 521. 



MOLLUSC A. 



INVERTEBRAL ANIMALS. 



Invertebral animals are those which are destitute of a spine, or back bou,>. 

 '1 his great division of animated beings possess few positive characters whicli 

 they have in common. .Some have their bodies protected by a shelly cover- 

 ing ; others have no other defence than a soft and tender skin ; while others 

 liave their members surrounded by crustaceous plates. The nervous and 

 circulating systems are less perfect than in animals with a spine ; and few of 

 them have red blood. The spinal chord is represented in molluscous animals 

 by ganglions of the nervous filaments. None of the invertebral animals pos- 

 sess all the senses ; and the sexes are frequently united in the same indi- 

 vidual ; while, in others, the species is continued by a process somewhat re- 

 sembling vegetation. 



Cuvier arranges inverteliral aninjals into three groat divisions. 1st. Tliov« 

 destitute of a skeleton, which are termed Mol/usca. 2d, Animals wlio'.r 

 trunk is divided into rings, these are called Aitknlata. 3d, Those animals 

 known by the name of Zoophytes, whii li Cuvier calls Radiata. 



DIVISION II.— MOLLUSC.4. 



Class L MoUiisca.— II. Conchifera.~l\\. Ttinicata.—W. C/rn'pichi. 

 DIVISION III.— ARTICULATA. 

 Class V. Anne!idcs.-~Vl. Crusiacea.--V 11. Arc/inirles.—Wll. MijriapoiUi. 



IX. Insccta. 



