MOLLUSCA. 829 



Of this shell the- animal is known from only imperfect figures, and some 

 specimens not entirely perfect. See E. J. GRAY Annals of Nat. Hist. xv. 

 PP- 2 57 2 6o, PI. xv. A mutilated specimen, investigated by OWEN in 

 1848, has afforded, however, by the anatomical particulars of internal 

 structure the certainty that the animal resembles the Sepiacea or Decacera. 

 There are two gills, two lateral or venous hearts, an ink-sac, a membranous 

 tubular siphon, &c. See R. OWEN in Zoology of the Voyage of H. M. S. 

 Samarang, under the command of Capt. Sir EDWARD BEECHER, Mollusca, 

 Part i. London, 1848, pp. 6 17, PL iv. 



Sp. Spirula Peronii LAM., Nautilus spirula L. ; the shell has been several 

 times figured, as in RUMPH. Amb. Rariteltk. Tab. 20, fig. i, D'ARGENV. 

 Conchyl. PI. 5, fig. G, G, &c. 



Sepia LAM. (species from genus Sepia L.). Body sacciform, 

 depressed, margined on each side by a narrow membrane or longi- 

 tudinal fin. A calcareous lamina elongate, dorsal, included in 

 mantle. 



Seiche, Dintenfisch, Sea-cat, Ink-fish, Cuttle-fish. The calcareous plate in 

 the back consists of many laminae. This part, known as os Sepia; is used 

 by miniature-painters for polishing ivory plates and forms a component of 

 some tooth-powders. 



Sp. Sepia officinalis L., BRANDT u. KATZEBURG Mediz. Zool. n. Tab. 31, 

 fig. i ; GUERIN Iconogr., Moll. PI. i. fig. 4, &c. CARUS has given coloured 

 figures from living animals, Nov. Act. A cad. Gees. L. G. Nat. Curios, xn. 

 1824, pp. 313322, Tab. 2832. 



Sepioteuthis BLAINV., Chondrosepia LEUCK. 



Loligo LAM. Body elongate, pinnate posteriorly on each side. 

 An elongate, narrow, horny, lamina at the back, covered by mantle. 



Sp. Loligo vulgaris, Sepia loligo L., BLAINV. Malacol. PI. 3, fig. 2, CARFS 1. 1. 

 Tab. 29, fig. i, &c. 



Ommastrephes D'ORB., Ommatostrephes LOVEN. 



Onychoteuthis LICHTENST. The longer or all the arms armed with 

 horny hooks. 



Onychoteuthis Fabricii MOELLER, Sepia loligo FABR., Fauna Grcenl. ; 

 Loligo Banksii, Loligo leptura, Loligo Smithii LEACH in TUCKEY'S Expedi- 

 tion to the River Zaire. 



Sepiola LEACH. 



Sp. Sepiola Rondcletii, Sepia sepiola L., BLAINVILLE Malacol. PI. n. fig. 3- 

 Coinp. R. E. GRANT on the anatomy of Sepiola vulgaris LEACH, &e. 

 Transact, of the Zool. Soc. T. 1833, pp. 77 86, PI. IT. 



