C E 



[79] 



C E T 



the class, Zoophytes, or animal 

 plants, comprising Gorgonia, Cor- 

 allium, Pennatula, &c. They have 

 a horny axis, covered with a fleshy 

 substance, from the cavities of 

 which polypi occasionally appear. 



CEEEBE'LLUM. (Lat.) Dim. of cere- 

 brum; the little brain situate 

 behind the brain, or cerebrum. 



CE'EEBETIM:. (Lat.) The brain. 



CE'BEBEAI. | (cerebral, Fr. cerebrate, 



CE'EEBBINE. ) It.) Belonging to 

 the brain : relating to the brain. 



CEEIOP'OBA. The name assigned to a 

 genus of zoophytes. 



CEEI'OPOEITE. A fossil ceriopora. 

 Twenty-one species have been de- 

 termined by Goldfuss, as occuring 

 in the cretaceous group ; nine 

 species have been found in the 

 oolite, and six in the grauwacke 

 group. 



CE'EITE. The siliceous oxide of cerium. 



CEEI'THHTM. A turreted or turricu- 

 lated univalve, with an oblique 

 opening. Lamarck has discovered 

 sixty fossil species of the genus 

 Cerithium in the neighbourhood of 

 Paris. The recent cerithium is 

 found at depths varying to seven- 

 teen fathoms, and it is stated that 

 so tenacious of life is at least one 

 species, the cerithium telescopium, 

 that a specimen sent from Calcutta 

 in sea water, lived out of water in 

 a tin-box for more than a week. 

 The recent cerithium has a veil 

 on its head, with two separated 

 tentacula. 



CE'BITHITE. The fossil cerithium. 



CE^BIUH. A metallic substance dis- 

 covered by Berzelius and Hissinger 

 in 1804. It was obtained from a 

 mineral called cerite, which was 

 formerly supposed to be an ore of 

 tungsten; it is also found in 

 allanite. 



CE'EVIX. (Lat.) The neck. 



CEBVI'CAL. (cervicalis, Lat. cervical, 

 Fr. cervicale, It.) Belonging to 

 the neck, as the cervical vertebra?, 



the cervical muscles, the cervical 

 arteries. 



CEBVI'COBRANCHIATA. In the con- 

 chological system of Be Blainville, 

 the name given to an order of 

 shells, comprising the two families 

 Ketifera and Branchifera, and the 

 genera Patella, Fissurella, Emar- 

 ginula, and Parmophorus. 



CESTEA'CION. } InAgassiz'sTa- 



CESTBA'CIONTS. PL. j bular View 

 of the Genealogy of fishes, the 

 Cestracionts, and they only, sweep 

 across the entire geological scale. 

 With this family, so far as is yet 

 known, ichthyic existence first 

 began. Hugh Miller. 



The Cestracions constitute a 

 family of fishes of the placoid order. 

 " It does not appear that on tho 

 globe we inhabit there was ever 

 an ocean, tenanted by living 

 creatures, that had not its ces- 

 tracion". Hugh Miller. 



The first and oldest sub-family 

 of sharks. The cestracionts have 

 only one living representative, the 

 Cestracion Philippi, or Port Jackson 

 Shark. The character of this sub- 

 family of sharks is marked by the 

 presence of large polygonal obtuse 

 enamelled teeth, covering the inte- 

 rior of the mouth with a kind of 

 tesselated pavement. In some 

 species, not fewer than sixty of 

 these teeth occupied each jaw. 

 They are rarely found connected 

 together in a fossil state, in conse- 

 quence of the perishable nature of 

 the cartilaginous bones to which 

 they are attached. They are found 

 abundantly dispersed throughout 

 all the strata, from the carboniferous 

 to the most recent chalk series. 

 Buckland. 



CESTEA'CIONT. Resembling a cestra- 

 cion; pertaining to a cestracion. 

 "This fish belongs to the cettraciont 

 family, of the placoid order." 

 Hugh Miller. 



CETA'CEA. Vertebral, warm-blooded 

 animals, living in the sea; they 



