22 MALAC.OZOA. CEPHALOPODA. 



two long tentacula ; the body naked, sometimes par- 

 tially enclosed in a shell. 



CephaUpoda Testdcea Monothdlama and Non-testdcea, 

 Lamarck. KpuTrra&o?, concealed ; B^ay^m, 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 Sepia, Linnaeus. STjma, Sepia, Cuttle-fish. 



DECECERATA. Blmnville. Ae'*a, ten; Kepara, horns. 



GENUS 1. SEPIOLA. Body short, sacciform, rounded 

 behind, with two rounded lobes ; eight sessile arms 

 nearly equal ; two pedimculated arms. Diminutive of 

 Sepia, Cuttle-fish. Leach. 



1 . Sepiola Rondeletii. Body orbicular, natatory lobes 

 round. Named after Eondelet, a French naturalist. 



GENUS 2. SEPIA. 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 shell elliptical, lamellar, calcareous. 27777/0, 

 Sepia, a Cuttle-fish. Linnaeus. 



I. Sepia officindlis. 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 long fleshy arms, and two very long pedunculate 

 arms ; acetabula with denticulate horny margins ; inter- 

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

 or Calmary. Lamarck. 



1. Loligo vulydris. Natatory appendages semi* 

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



