belemnitic

[Eng. belemnit(e); -ic.] 1. Pertaining to the belemnite shell; con stituting the fleshy portion of the belemnite. "The belemnitic animal, a dibranchiate eight-arme Cuttle "-Eng. Cyclop., i. 436. 2. Pertaining to the animal enveloping the shell called belemnite. a specimen of a Belemnite in which not only the ink-bag but the rauscular mantle, the head and its crown of arms, are all preserved in connexion with the belemnitic shell."- Owen : shell. " Olwen : Invertebrata (1843). běl-em-nit'-i-dæ, s. [BELEMNITE.] Palæont.: A family of molluscs belonging to the cla Cephalopod a, the order Dibrarchiata, and the section Decapod a. The shell consists of a "pen" terminating posteriorly in a chambered cone, technically called a phrag mocone, from φραγμός (phragmos) = a hedge, fence, paling, fortification, or enclosure, and κῶνος (kōnos) = the mathematical figure termed The phragmocone is sometimes invested with a fibrous guard, and it has air-cells connected by a siphuncle piercing the several chambers close to the ventral side. Dr. S. O. Woodward arranges the Belemnitidæ between a cone. as; expect, Xenophon, exist. ph=L The American Dictionary and Cyclopedia 502 the Teuthidæ, or Calamaries and Squids, on the one hand, and the Sepiadæ or Sepias on the other. In geological time they extend from the Lias to the Chalk. The genera are Belemnites, Belemnitella, Xiphoteuthis, Acanthoteuthis, Belemnoteuthis, and Conoteuthis. The following Belemnitidæ characterise the Lower Lias: B. acutus, B. pencil lat us, B. clavatus . Middle Lias: B. compre us, B. breviformis, B. paxil los us . Upper Lias: B. a cum in at us, B. lævis, B. Ilminsterensis . Midford Sands: B. irregular is . Inferior Oolite B. canaliculatus, B. Gingenis, B. elliptic us . Stones field Slate B. Be inus. Oxford Clay B. has tatus, B. Oweni. Coralline Oolite B. abb rev i at us. Kim me ridge Clay B. exp lan at us. Neocomian: B. jaculum. Gault: B. minimus, B. ultimus . Lower Chalk: Belemnitella plena . Upper Chalk: Belemnitella mucronata .