philonexidjE : tremoctopus. 27 



Perhaps young of former, no appearance of tubercles beneath, 

 both surfaces alike. 



a, b. South of Europe. In spirits. Presented by P. B. 



Webb, Esq. 



2. TREMOCTOPUS. 



Arms moderate, triangular, upper surface flat, with two serie9 of 

 subcylindrical sessile cups ; two upper pair longest, and webbed 

 nearly to the tip. Aquiferous openings four ; two above between 

 the eyes, and two below, and sometimes six smaller on each 

 side. 



Tremoctopus Belle Chiqje, MS. 1835, quoted by D'Orbigny ; 



Verany, Cat. Anim. Invert. 1848. 

 Tremectopus Gray, Prcc. Zool. Soc. 1847, 205. n. 793. misprint. 

 Philonexis sp. B"Orb. Cephal. Acet. 1838, Moll. Viv. et Fos. i. 



205. 

 Ocythoe sp. Risso, Eur. Merid. iv. 

 Octopus sp. Ferussac, Bang. 

 Phisoniscus Riippell, MS. Brit. Mas. 



* Webs moderate. Lower Arms shorter, free. Head large. 



1. Tremoctopus Quoyanus. 



Body smooth, oblong, large, pointed behind ; white, marked with 

 red. Head large, smooth. Eyes large, prominent, without 

 eyelids, blue above. Water apertures four ; two above between 

 the eyes, and two below. Arms elongated, unequal ; order of 

 length, 1, 2, 4, 3; two dorsal pair longest, and webbed together 

 half their length. 



Octopus (Pbilonexis) Quoyanus TfOrb. Voy. dans VAmer. Merid. 

 Moll. 17. t. 2. f. 6—8. 1835, Mag. de Zool. 1835, 141. 



Philonexis Quoyanus B'Orb. Mon. Ceph. Acet. 96., Poulpes, t. 16. 

 f. 68. 23. 1838, Moll. Viv. et Fos. i. 202. t. 5. f. 1. 1845. 



Octopus semipalmatus Owen, Trans. Zool. Soc. ii. t. 21, f. 12, 13. 

 1836. 



Hab. Middle of South Atlantic Ocean. 



** Arms all webbed. Head moderate, with several small ocular 



aquiferous Apertures. 



2. Tremoctopus violaceus. 



Body rather ovoid, truncated anteriorly, nearly smooth, violet. 

 Head short. Aquiferous apertures four, large ; two above and two 

 below ; and six small ones near each eye. Arms elongated ; order 



C 2 



