OCTOPIDJE : OCTOPUS. 13 



2, 3, 4, 1, or 3, 2, 4, 1. Cups very large, the first three in one 

 line. Web rather wide, granulated above, extending up the 

 outer side of the arms, especially of the second and third pairs. 

 — Violet brown, beneath white. 



Octopus tuberculatus Blainville, Diet, des Sc. Nat. 1826, p. 6. t. 1. f. 



3. ; Faun. Franc. Moll. 8. t. 1. f. 3. ; D'Orbigny et Ferussac, Mon. 



des Ceph. Acet.38., Poulpes, t. 21. 23. p. 38. ; UOrbigny, Moll. 



des Antilles, 15. n. 2., Moll. Viv. et Fos. i. 170. t. 1. 

 Octopus ruber Rafnesque, Precis des Decouv. Somiol. 28. n. 70. ? 



Hab. Atlantic Ocean, Mediterranean. 



a. Pacific Ocean. In spirits. ? 



21. Octopus poltzenia. 



Body oblong, rounded, short. Head, back of the dorsal arms, and 

 back of body granular, and with a few scattered warts or short 

 beards. Arms slender, outer edge of ventral arms smooth ; 

 comparative length, 4, 3, 2, 1. Web short, rather wider below, 

 Cups large, subequal. 



Hab. Australian seas. 



a. Port Essington. In spirits. Presented by the Earl of 

 Derby. 



22. Octopus membranaceus. 



Body obtuse, granular, provided with a lateral membrane. Head 

 large ; ocular beards three, elongate, granular above and below. 

 Arms short, unequal, quadrangular ; order of their length, 2, 



3, 4, 1. Cups large. Web short, granular. — When alive, white, 

 with a black eyed spot between the bases of the second and 

 third pairs of arms. 



Octopus membranaeeus Quoy $' Gaim. Zool. de Voy. de VAst. ii. 

 89. t. 6. f. 5. ; D'Orbigny et Ferussac, Mon. des Ceph. Acet. 43. 

 Poulpes, t. 10. 28. ; D'Orbigny, Moll Viv. et Fos. i. 181. n. 19. 



Hab. New Guinea. 



2 § Cups of the dorsal Pair of Arms larger than the rest. 



23. Octopus Cuvieri. 



Body oblong, enlarged below, warty above, and with a medial 

 posterior beard ; aperture of moderate size. Ocular beards indis- 

 tinct. Arms very long, slender, unequal; order of length, 1, 2, 

 3, 4; first and third much longest. Web broad. Cups elevated, 

 some on the two upper pair of arms larger. 



