. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Gladius of the Calamary. Rudimental Shell of the Cuttle-fish. The Sepium or Cuttle-bone (Jig. 229) is a well-known substance, and formerly figured in the Materia Medica as an antacid. It is a light cellular calcareous body, of a peculiar form and structure; and, as it is confined ex- clusively to the genus Sepia, its presence alone serves to characterise that section of Cepha- lopods. Its form is an elongated oval, de- pressed, convex on the dorsal surface, partly convex and partly concave on the opposite side: it termin
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Gladius of the Calamary. Rudimental Shell of the Cuttle-fish. The Sepium or Cuttle-bone (Jig. 229) is a well-known substance, and formerly figured in the Materia Medica as an antacid. It is a light cellular calcareous body, of a peculiar form and structure; and, as it is confined ex- clusively to the genus Sepia, its presence alone serves to characterise that section of Cepha- lopods. Its form is an elongated oval, de- pressed, convex on the dorsal surface, partly convex and partly concave on the opposite side: it terminates posteriorly in a very thin, * " Tr, /txlv otiv (Tuori'ct, xa» -rri TEtifli'Si Hal rm TEu9a> IVTO'C ifi TO. ff-riflii ev -r» TrpavEi" ToD o-ofytetToj, a xa- Xoi/iri TO fjiiV trinrtn, ti 5e £/o?. Sub dorso firma parsSepise Loligini ac Loliocontinetur ; i\\i\lssepi^<m, horum gladium vocant.—Hist. Animal., lib. iv., c. 1. 12mo. Ed. Schneider. dilated, aliform margin (a, a), partly calca- reous and partly horny, which becomes nar- rower as it advances forwards, and is gradually lost in the sides of the shell. As this margin is inclined towards the ventral aspect, it pro- duces at the posterior and ventral side of the shell a wide and shallow concavity, comparable to the chamber of the Nautilus shell which protects the body of that species : if the free margin of the sepium were in like manner produced beyond the previously deposited layers, it would advance from the posterior and lateral aspects of the animal, and cover the ventral surface, as in the Nautilus, leaving the convexity produced by the chambered portion projecting into the back. The thickened part of the sepium (6) which retains that situation, is in fact composed of a series of thin parallel calcareous plates, successively deposited and extending obliquely forwards from the ventral to the dorsal surface : the last formed plate is the most internal and the broadest, but not the longest also, as
Size: 2291px × 1091px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
