PHILONEXIDJE I 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 series 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 Chiaje , MS. 1835, quoted by D’Orbigny ; 
Verany , Cat. Anim. Invert. 1848. 
Tremectopus Gray , Proc. Zool. Soc. 1847, 205. n. 793. misprint. 
Philonexis sp. B' Orb. Cephal. Acet. 1838, Moll. Viv. et Fos. i. 
205. 
Ocythoe sp. Risso , Fur. Merid. iv. 
Octopus sp. Ferussac , Rang. 
Phisoniscus Rilppell , MS. Brit. Mus. 
* 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 (Philonexis) Quoyanus H Orb. Voy . dans VAmer. Merid. 
Moll. 17. t. 2. f. 6—8. 1835, Mag. de Zool. 1835, 141. 
Philonexis Quoyanus D' 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 
