22 MALACOZOA. CEPHALOPODA. 



two long tentacula ; the body naked, vsometimes par- 

 tially enclosed in a shell, 



Cephaldpoda Testdcea Monothdlama and Non-testdcea, 

 Lamarck. Kpvnradios, concealed; Bpayx^a, gills* 



Family I. — Sepiina. 



The mantle continuous round the body ; an internal 

 horn or calcareous lamina ; head with eight or ten mus- 

 cular appendages, furnished with acetabula; eyes very 

 large. 



Genus SSpia, Linnaeus. Srjnia, Sepia, Cuttle-fish. 



Dececerata. Blainville. Ae<a, ten; Kepara, horns. 



Genus 1. Sepiola. — Body short, sacciform, rounded 

 behind, with two rounded lobes ; eight sessile arms 

 nearly equal ; two pedunculated arms. Diminutive of 

 Sepia, Cuttle-fish. Leach. 



1. Sepiola UondeUtii. — Body orbicular, natatory lobes 

 round. Named after llondelet, a French naturalist. 



Genus 2. Secia. — Body sacciform, rounded behind, 

 depressed, margined on each side with a narrow mem- 

 brane ; eight triangular fleshy arms, and two pedun- 

 culate arms ; acetabula with entire horny margins ; in- 

 ternal^dorsal sheLi elliptical, lamellar, calcareous. 2r)nia, 

 Sepia, a Cuttle-fish. Linnaeus. 



I. Sepia officinalis. — Body smooth ; pedunculate 

 arms, very long. Named from the bone being sold in 

 officinis, in the shops. 



Genus 3. Loligo. — Body elongated, tapering, mar- 

 gined behind on each side with a broad membrane ; 

 eight loug fleshy arms, and two very long pedunculate 

 arms ; acetabula wi ib denticulate horny margins ; inter- 

 nal dorsal shell elongated, horny. Loligo, a Sleeve-fish 

 or Calmary, Lamarck. 



1. Loligo vulgaris. — Natatory appendages semi- 

 rhomboidal ; tip of the body free. Vulgaris, common. 



